A sloping back garden in Melbourne often comes with an old timber sleeper wall that leans a little further every winter, and sooner or later someone has to decide whether to patch it or replace it. Before anything is built, the questions are how high the wall will be, whether it needs a building permit, and who is responsible where it meets the neighbour’s land. This piece works through each of those for Victoria.

Why retaining walls are treated differently from garden walls

In Britain, a low brick wall around a front garden or a raised bed is rarely a regulatory matter, and most people only think about permission for walls near a road or in a conservation area. A retaining wall is a different animal. It holds back a mass of soil, often saturated after rain, and the forces involved grow quickly with height. When one fails it can push into a house, a driveway or the property next door.

That is why Victorian rules focus on what a wall is holding back rather than how it looks. A wall that simply edges a flower bed is treated very differently from one cut into a slope to create a level lawn or a building platform.

Heights and building permits in Victoria

As a general guide, a retaining wall in Victoria that is more than 1 metre high is likely to need a building permit. A lower wall can also need one if it supports a surcharge load, such as a driveway, a building or a pool near the top, or if it could affect the stability of a building or adjoining land, including land over the boundary. The detail sits in the Victorian building regulations and the way they are applied can depend on the specific site.

A building permit is issued by a registered building surveyor, either at your council or in private practice. Separately, some properties sit under planning overlays, for example for heritage, vegetation or land subject to inundation, which can bring their own requirements. Speak to your council’s planning and building departments early, describe the wall honestly, and get a clear answer in writing before work starts.

Where a permit is needed, the wall will usually have to be designed or certified by a structural or civil engineer. Engineering is worth having on taller walls even where the rules are unclear, because the cost of a failed wall dwarfs the cost of a design.

Drainage behind the wall

Most retaining walls that fail do so because of water rather than weight of soil alone. When rain soaks into the ground behind a wall and cannot escape, it adds enormous pressure. Melbourne’s clay soils, particularly across the western and northern suburbs, hold water and swell, which makes drainage even more important.

A properly built wall normally has a slotted agricultural drain, known locally as ag pipe, laid along the base at the back, surrounded by free-draining gravel and wrapped in a geotextile fabric to stop fine soil clogging it. That drain needs somewhere legal to discharge, usually the property’s stormwater system. Weep holes through the face of block or concrete walls are common too. If a quote does not mention drainage, ask why.

Sleepers, blocks or concrete

Treated pine sleepers between steel or timber posts are the cheapest and quickest option, and they are everywhere in Melbourne gardens. The timber must be treated to a level suitable for ground contact, and even then it has a finite life, as the leaning walls in many back gardens show. Hardwood sleepers last longer but cost more.

Concrete sleepers slotted between galvanised steel posts have become very popular because they do not rot and come in a range of colours and textures. Segmental concrete blocks, which interlock and are often laid with a slight backward lean, suit curved walls and moderate heights. Reinforced concrete or core-filled masonry walls are usually reserved for taller structures or walls near buildings, and are almost always engineered.

The right choice depends on height, soil, access and budget. A good way to get a feel for the trade-offs is to talk to experienced retaining wall builders in Melbourne who can look at your site, explain which systems suit it, and tell you where permits and engineering are likely to come in.

Boundaries and neighbours

Walls on or near a boundary cause more friction than almost any other garden project. As a broad principle, the owner who changed the natural ground level is often expected to retain it, but the history of a site is not always clear, and an old wall may predate both current owners. Victoria’s fencing laws deal mainly with dividing fences, and a retaining wall is not the same thing, even when a fence sits on top of it.

Before building near a boundary, confirm exactly where the boundary is, which may mean engaging a licensed land surveyor, and talk to the neighbour early. Footings and drainage can extend beyond the face of the wall, and excavation can undermine the neighbour’s side. If an agreement cannot be reached, the Dispute Settlement Centre of Victoria offers free mediation, and legal advice may be needed for anything more serious.

Questions readers ask

Can I replace an old sleeper wall like for like without a permit?

Not necessarily. If the replacement exceeds the height threshold or supports a load, it may need a permit even though a wall was already there, so check with a building surveyor first.

Who pays for a retaining wall on a shared boundary?

It often depends on who altered the ground level and when. Where that is unclear, owners commonly negotiate a split, and mediation is available if they cannot agree.

How long does a treated pine sleeper wall last?

It varies with treatment level, drainage and soil moisture. Expect considerably less life than a concrete or masonry wall, and inspect posts for rot regularly.

In the UK, a garden pond needs no fence and a private swimming pool is a rarity. In Australia, backyard pools are common and every state treats the barrier around them as a legal safety requirement, not a design choice. This article explains what buying a house with a pool commits you to, and where the rules vary between states.

Why the rules are so strict

Drowning is a leading cause of accidental death among young children in Australia, and home pools feature heavily in those figures. The response, built up over several decades, is a system of compulsory barriers, regular checks in some states, and obligations that pass to each new owner. Once you buy the house, compliance is your responsibility, whether or not the previous owner kept on top of it.

The rules apply to swimming pools and, in most states, to spas and other structures capable of holding water above a certain depth. That can include some above-ground and inflatable pools, which surprises many people.

The technical standard

Barrier design is based on the Australian Standard for swimming pool safety barriers, AS 1926.1, published by Standards Australia, though each state decides which version applies and adds its own legislation on top. Which version you need to meet can depend on when the pool was built, so an older pool may be assessed differently from a new one.

The broad principles are consistent. The barrier must be a minimum height, with no gaps a small child can squeeze through and no footholds or climbable objects nearby. Gates must be self-closing and self-latching, open outwards away from the pool, and have the latch out of a child’s reach. Many older homes used a wall of the house as part of the barrier, with doors or windows opening into the pool area; that arrangement is now heavily restricted, and windows may need locks or security screens.

The most common failures are mundane: a gate that no longer swings shut on its own, a pot plant, barbecue or garden chair placed against the fence, a tree branch hanging over it, or soil built up at the base so the effective height drops.

How the states differ

Every state and territory has its own framework, and these details change, so treat the following as an orientation only and check the current rules with your state government or local council.

• New South Wales: pools must be registered on a state register, and a compliance or relevant certificate is generally needed when a property with a pool is sold or leased. The NSW Government’s building and renovating information is a starting point for the state’s requirements.
• Queensland: a pool safety certificate is generally needed when selling or leasing, and there is a state register of pools.
• Victoria: pools and spas must be registered with council, with periodic compliance certificates lodged by the owner.
• Western Australia: local governments carry out periodic inspections of private pools.
• South Australia, Tasmania and the territories: have their own arrangements, often tied to when the pool was built or the property sold.

Buying a house with a pool

Ask early whether the pool is registered and whether there is a current compliance certificate, and ask your conveyancer what the sale contract says. In some states, a property can be sold without a certificate on the basis that the buyer will fix the problems within a set period, which shifts the cost and work to you.

A pre-purchase inspection may note obvious barrier issues, but it is not a pool compliance inspection. Our guide to reading a building and pest report explains what those inspections do and do not cover. If certification matters to the purchase, a separate inspection by an accredited pool safety inspector or certifier is more reliable.

Fixes range from cheap, such as adjusting gate hinges or moving a planter, to substantial, such as replacing a non-compliant boundary fence or reworking a house wall that forms part of the barrier. Get a proper assessment before you set a budget.

Living with a pool

Make checking the barrier part of your routine. Test that the gate closes and latches from any open position, keep the area outside the fence clear of anything climbable, and trim plants that grow towards or over it. Never prop the gate open, even briefly. If you change the fence, landscaping or any structure near the pool, the barrier may need reassessing, and some works need council approval.

Rules also apply during construction or major renovation, when temporary fencing is usually required if the pool holds water.

Questions readers ask

Does an inflatable pool need a fence?

In many states, a pool able to hold water above a set depth must have a compliant barrier, even if it is portable. Check your state’s threshold before filling one.

Can a boundary fence form part of the pool barrier?

Often yes, provided it meets the height and non-climbable requirements on the pool side. Shared fences need care, as changes on the neighbour’s side can affect compliance.

What happens if my pool fails an inspection?

You will usually be given a list of defects and a period to fix them. Councils can issue fines or directions if work is not done.

An English lawn is mostly a matter of mowing: the rain, the clay and the cool summers do the rest. A Perth lawn is the opposite, because almost everything that makes grass grow has to be supplied by you. This piece explains why Perth sand behaves so differently, which grasses suit it, and how to set a new lawn up so it survives its first summer.

Why Perth sand is not like garden soil at home

Most of metropolitan Perth sits on the Swan Coastal Plain, a broad strip of ancient coastal dunes. In many suburbs the “soil” is pale, coarse sand that drains almost instantly and holds very few nutrients. Water and fertiliser that would sit in a British loam for days can pass through Perth sand in hours.

The second surprise is water repellence. Sand grains pick up a waxy coating from decomposing plant material, and once the surface dries out properly it can shed water rather than absorb it. You will see it after a hot spell: the sprinkler runs, the water beads and runs off to the lowest point, and a few centimetres down the sand is bone dry. Gardeners call this hydrophobic soil, and it is the main reason lawns go patchy in a regular, almost geometric way.

Neither problem is fatal. Both are managed rather than cured, which is a mindset worth adopting early.

Warm-season grasses instead of ryegrass

The UK lawn is built on cool-season grasses such as perennial ryegrass and fescues, which grow in mild, damp weather and sulk in heat. In Perth those conditions describe a few weeks of the year at best. The grasses that cope are warm-season species that grow hard through summer, slow down in winter and spread by runners, so they knit back together after damage.

Winter colour is the trade-off that most British arrivals notice. Couch in particular can look straw-coloured from June to August. That is dormancy, not death, and the lawn greens up again as the soil warms in spring.

Preparing the ground before the turf goes down

Because the sand is so poor, preparation matters more than the grass variety. The usual approach is to remove weeds and old runners, level the area, and work a soil improver into the top layer. Composted organic material helps the sand hold water and nutrients; some products also include clay or other minerals for the same reason. A wetting agent applied at this stage helps water penetrate evenly from the start.

Roll-on turf is the norm in Perth rather than seed, largely because seed struggles in loose, fast-drying sand and wind. Turf gives you a cover from day one, and it ties the surface together before summer arrives. Timing matters: spring and early autumn are generally the kindest windows, when the grass is actively growing but the heat is not yet relentless. Laying in midsummer can work with very careful watering, while laying in the depths of winter means the turf sits there without rooting until it warms up.

The sequence of preparation, product and timing varies from block to block, especially on new estates where builders’ sand has been brought in. For that reason it is worth talking to a firm that does lawn installation in Perth about what your particular ground needs, rather than relying on a general rule.

Watering rosters and summer survival

Perth has permanent restrictions on garden watering. Households on scheme water are generally assigned specific sprinkler days each week according to their address, with a ban on sprinkler use through the coolest winter months. Bore water users have their own roster. Times of day are also restricted to avoid the heat of the afternoon. The details are set by the state and the Water Corporation and do change, so check the current rules for your address rather than assuming last year’s.

Within those limits, a few habits make a large difference:

• Water deeply and less often, so roots follow the moisture downwards instead of staying near the surface.
• Reapply wetting agent as recommended, usually before summer, to keep repellence in check.
• Mow a little higher in summer. Longer leaves shade the soil and reduce evaporation.
• Feed lightly and regularly in the growing season rather than with one heavy dose, since sand will not hold it.
• Check sprinkler coverage. Dry arcs near the edges are often a nozzle problem, not a grass problem.

Adjusting your expectations

A Perth lawn will not look like a striped Cotswolds green, and trying to make it do so wastes water. Many households keep a modest area of warm-season turf where children and pets actually play, and use native planting, mulch or paving elsewhere. That approach suits the roster, the sand and the heat, and it leaves less to mow in February.

Questions readers ask

Can I bring ryegrass seed from the UK and sow it in Perth?

Australia’s biosecurity rules restrict importing seeds, so packets from home are likely to be seized or need declaring. Even if it were allowed, cool-season ryegrass would struggle through a Perth summer on rostered watering.

Why does my new lawn have dry patches when the sprinkler covers them?

The most common cause is water-repellent sand, where water runs off rather than soaking in. A wetting agent and a slower, deeper watering cycle usually help, alongside checking that the sprinklers overlap properly.

Is it normal for the lawn to go brown in winter?

Yes, for several warm-season grasses, particularly couch. They slow down or go dormant when the soil cools and recover in spring.

In much of Britain a patio is used on a handful of summer evenings, then left to the moss. On the Sunshine Coast, the outdoor area is often the busiest room in the house for most of the year. This article covers what goes into building one well: the slab, the finish, the roof over it and the ground underneath, which near the beach is rarely what a British homeowner expects.

The alfresco is a room, so plan it like one

Australians use the word alfresco for a covered outdoor living space, usually attached to the house and opening from the kitchen or family room. On the Sunshine Coast it typically holds a dining table, a barbecue and somewhere to sit out of the sun, and for many households it is where meals happen from September to May.

That changes the priorities. Size matters more than in a British garden: a table for six with chairs pulled out, plus space to walk around it and a barbecue that is safely clear of the eaves, takes up more room than most people guess. Shade matters more than sun. And the link to the indoors matters, because a step down, a lip or a door track in the way becomes a daily irritation.

Many newer homes are designed with the alfresco floor at, or very close to, the internal floor level. That looks good and is easier to live with, but it means drainage at the threshold has to be thought through carefully so that a summer storm does not drive water under the sliding doors.

Falls, drainage and the summer storm

South-east Queensland gets heavy summer rain, often arriving as short, intense afternoon storms. Any slab beside the house needs a fall, a gentle slope, that carries water away from the building rather than towards it. The fall is subtle enough that you will barely notice it on a dining table, but it has to be built in from the start; it cannot be added later.

Where the slab meets the house, check that it sits below any weep holes in the brickwork and does not bridge the termite protection or the damp-proof arrangement at the base of the wall. A slab poured too high against a wall is a common way for water and termites to find a path into a home. Grated drains at the threshold and a lawful connection to stormwater finish the job.

Sand, salt and what lies beneath

Close to the beach, from Caloundra up through Mooloolaba and Coolum to Peregian, many blocks sit on sand. Sandy ground does not swell and shrink like the reactive clays found further inland and in the hinterland, which is helpful, but it needs proper compaction before concrete goes on it. Loose sand under a slab will settle unevenly and cause cracking.

Some low-lying parts of the coast also contain acid sulfate soils, which can release acid when they are dug up and exposed to air. If your project involves significant excavation, such as for a pool, the council may require these soils to be identified and managed. The Sunshine Coast Council’s mapping and your builder or certifier can tell you whether that applies to your block.

Salt air is a factor for anything metal. Reinforcing steel needs adequate concrete cover, and exposed fixings, brackets and roof framing near the water should be rated for a coastal environment. Galvanised or stainless options cost more upfront and save money later.

Finishes for bare feet and wet pool decks

An outdoor area on the coast is walked on barefoot, often with wet feet coming straight from the pool. Two things follow. The surface needs to grip when wet, and it should not get scorchingly hot in direct sun. Dark-coloured concrete and some pavers can become unpleasant to stand on in January.

Popular choices include exposed aggregate, which has natural texture; honed concrete with an anti-slip treatment; and broom or textured finishes for purely practical areas. Pool surrounds have additional rules: the area around a pool forms part of the barrier arrangements, so check fencing clearances and gate positions before the slab layout is fixed.

Because the right choice depends on the soil, the exposure and how the space will be used, it helps to look at local work and to speak with experienced concreters on the Sunshine Coast who pour on sand and near salt water routinely. Ask to see jobs that are a few years old, not only freshly sealed ones.

Roofs, footings and approvals

A patio roof over the alfresco is almost standard. It might be insulated sandwich panels, a skillion attached to the existing roofline or a freestanding gable. Whatever the style, the posts need proper footings, and those footings are designed for both the soil and wind uplift. In a storm, a roof wants to lift, and the footings and fixings hold it down.

In Queensland, many patio roofs need building approval through a private building certifier, and some also need council approval because of boundary setbacks or overlays. Work above a modest value must be carried out by a contractor licensed with the Queensland Building and Construction Commission, so check the licence before paying a deposit.

It is usually simpler to design the slab and roof together. Footings can be placed in the right spots before the concrete goes down, and the fall of the slab can be coordinated with where the roof drains discharge.

Questions readers ask

Do I need approval just for a concrete slab?

A plain slab at ground level often does not, but drainage, overlays or proximity to boundaries can change that. A roof over it is far more likely to need approval, so check with a certifier or the council.

Should I seal an outdoor slab?

Sealing helps resist staining from barbecue fat and leaf tannins. Choose a sealer with an anti-slip additive for any area that gets wet.

Are pavers better than concrete on sand?

Pavers laid on a well-compacted base cope well with small movements and are easy to lift for repairs. Concrete gives a seamless surface and is often cheaper over large areas.

Australian seasons run six months out of step with Britain’s, and they start on the first day of the month: summer is December to February, autumn March to May, winter June to August and spring September to November. That much is easy to learn; the harder adjustment for a British gardener is that the calendar is not simply flipped, because most of Australia’s populated areas are warmer, drier and sunnier than anywhere in the UK, and the gardening year changes shape as a result.

Flipping the months is only the start

A first attempt usually involves taking the familiar British routine and adding six months. Sow sweet peas in March instead of September; plant bulbs in April instead of October. As a starting point that works surprisingly often in the cooler south. It breaks down quickly further north, and it ignores the biggest difference of all: in much of Australia, summer is the hard season for plants, not winter.

In the UK, winter is when gardens rest because of cold and short days. In Perth, Adelaide, much of Sydney and the inland, summer heat and drought do the same job. Many plants slow or stop through January and February, and the most productive periods in the vegetable garden are autumn and spring rather than high summer.

Know your climate zone

Australia spans tropical, subtropical, temperate, Mediterranean and arid climates, and the right calendar depends on which one you are in. The Bureau of Meteorology’s climate information lets you look up long-term averages for rainfall, temperature and frost for your nearest weather station, which is far more useful than a national planting chart.

The season-by-season shape

Autumn (March to May)

For many British arrivals, autumn becomes the busiest time. Soil is still warm, the heat has eased, and the first rains in southern regions bring things back to life. It is a good time to plant trees and shrubs so they establish roots before the next summer, and to sow brassicas, broad beans, peas and many herbs.

Winter (June to August)

Away from frost-prone areas, winter is a mild growing season. Lettuce, spinach, onions and garlic do well, and roses are pruned much as they would be in the UK, just in July rather than February. In the subtropics, winter is the time for the vegetables that struggle in humid summers.

Spring (September to November)

Spring is when tomatoes, beans, cucumbers and zucchini (courgettes, as you know them) go in across most of the south. It is also the time to feed lawns and apply mulch ahead of the heat.

Summer (December to February)

Summer is mostly about keeping things alive. Mulch heavily, water deeply in the early morning, provide shade cloth for vulnerable plants and accept that some things will pause until March. Christmas is often spent picking tomatoes rather than reading seed catalogues by the fire.

Water, soil and a changing climate

Water is the constraint British gardeners underestimate most. Many cities have permanent water-efficiency rules, and restrictions can tighten in dry years. Our guide to water restrictions and rainwater tanks explains how they work and how a tank can extend what you can grow.

Soils vary as much as climate: deep sand in Perth, heavy clay in parts of Sydney and Melbourne, and generally lower organic matter than an established British garden. Adding compost and mulch every year helps almost everywhere. Conditions are also shifting. CSIRO publishes research on Australia’s changing climate, including warmer temperatures and changing rainfall patterns, which is worth reading before planning a long-lived garden or orchard.

Questions readers ask

Can I grow the same plants I grew in England?

Many will grow in the cooler south, especially in Tasmania and the Victorian hills. Further north, plants that need a cold winter, such as some apples, rhubarb and tulips, can struggle or need special varieties.

When should I plant spring bulbs?

In cooler southern areas, plant them in autumn, around March to May. In warm climates, some bulbs such as tulips need chilling in the fridge before planting or are treated as annuals.

Can I bring my seed collection with me?

Australia’s biosecurity rules are strict about seeds and plant material. Many seeds are restricted or prohibited, so check the import conditions before packing any.

Hosepipe bans in Britain are occasional and newsworthy. In much of Australia, rules about when and how you can water the garden are a permanent part of life, and a rainwater tank in the back garden is ordinary rather than eccentric. This article explains how water restrictions work, why they differ so much between cities, and what to know about installing and using a tank.

Why the rules exist even in wet years

Australia’s big cities draw on dams, groundwater and, increasingly, desalination plants. Rainfall is far more variable than in the UK, and long droughts are part of the climate. After severe dry spells in the 2000s, several water authorities replaced emergency bans with permanent, lower-level rules that apply all the time, then tighten them when storage falls.

These rules are set by the water authority or state government, not by your council. They change, so check the current position with your local water supplier rather than relying on what a neighbour remembers.

Two cities, two approaches

Perth is a good example of a strict regime. The city has a dry summer climate and relies heavily on groundwater and desalination. Water Corporation in Western Australia runs a sprinkler roster that limits scheme-water sprinklers to set days, allocated by address, and a winter sprinkler switch-off in many areas. Bores have their own rules. For a British gardener used to watering whenever the lawn looks thirsty, the roster takes some getting used to.

Sydney takes a lighter approach in normal times. Sydney Water publishes its everyday Water Wise Rules, which concentrate on watering in the cooler parts of the day, using a hose with a trigger nozzle rather than leaving it running, and not hosing down hard surfaces. Tighter restriction levels can be introduced when dam levels drop, as happened during the drought around 2019 and 2020.

Melbourne, Brisbane, Adelaide and regional towns each have their own versions. Fines exist, though in practice most authorities favour warnings and education.

Rainwater tanks: the basics

A rainwater tank collects water from the roof through the gutters and downpipes. Tanks come in polyethylene, steel and concrete, from slimline units that fit down a side passage to large round tanks on rural blocks. Many newer homes already have one, because some states require water-saving measures in new houses. In New South Wales, for example, the BASIX sustainability scheme often leads builders to include a tank.

Points worth understanding before you buy or use one:

• Approval: small tanks are often exempt from council approval, but size, height, position near boundaries and heritage or flood overlays can change that. Check with your council.
• Plumbing: connecting a tank to toilets or the washing machine, or installing a pump with a mains switch-over, is plumbing work that must be done by a licensed plumber.
• Water quality: first-flush diverters, leaf guards and mesh screens keep debris, animal droppings and mosquitoes out. Most authorities advise against drinking tank water in town if mains water is available.
• Rebates: some state governments, water authorities and councils have offered rebates for tanks or connections from time to time. Availability changes, so check before buying.
• Restrictions: in many places tank water is exempt from watering restrictions, but rules may still apply to how it is used. Your water authority can confirm.

Sizing and using a tank sensibly

The useful size depends on roof area, rainfall pattern and what the water is for. A small tank fills quickly in a storm and empties within a week of garden watering, so it helps most in climates with regular rain through the year. In a dry-summer city such as Perth or Adelaide, a tank fills over winter and runs low in summer, just when the garden needs it, which is an argument for a larger tank or for planting that needs less water.

Plumbing the tank to the toilet and laundry makes better use of it, because those uses run all year and draw down the tank so it can refill with the next rain. A pump that switches to mains water automatically when the tank runs dry saves a lot of fiddling.

Garden design matters as much as the tank. Mulch, drip irrigation on a timer and plants suited to the local climate all reduce demand. The seasons themselves are reversed, too, so our upside-down gardening calendar is useful when planning when to plant and when to expect the driest weeks.

Maintenance

Clean gutters and leaf guards regularly, empty and clean the first-flush diverter, check screens for holes, and have the tank inspected for sediment every few years. A neglected tank is a mosquito breeding ground and can smell. Most of the work is the same kind of gutter-clearing a British homeowner already knows, just more often.

Questions readers ask

Can I fill my pool from a hose during restrictions?

It depends on the restriction level and your water authority. Some allow it with conditions, others require a permit or ban it at higher levels.

Do renters have to follow watering rules?

Yes. Restrictions apply to whoever uses the water, whether owner or tenant.

Can I install a tank in a strata property?

Usually only with the owners corporation’s or body corporate’s approval, since it may affect common property or external appearance.