Balcony Rules in Strata: BBQs, Plants, Privacy Screens, Laundry and the Waterproofing Trap

Balcony Rules in Strata: BBQs, Plants, Privacy Screens, Laundry and the Waterproofing Trap

What this guide covers

• In nearly every Australian scheme the balcony is structurally common property, even where the resident has exclusive use of the floor area. Slab, waterproofing membrane (governed by AS 4654), balustrade and external wall almost never belong to the lot.
• Balcony waterproofing failure is consistently in the top three sources of strata insurance claims and building defects in Australia. A composite deck or layer of raised tiles installed without engineering review is one of the fastest ways to break a membrane that should have lasted 25 years.
• BBQ smoke, planter weight, falling objects, gas bottle storage, smoking drift, balustrade gaps and air-conditioning condensers are all everyday balcony issues with codes, standards or tribunal cases sitting behind them, not just preferences.
• Most balcony alterations need owners corporation approval. The exceptions are narrower than residents assume, and a quietly approved screen on lot 12 sets a precedent the committee will defend or repudiate for the next decade.
• Rules that work focus on safety, drainage, smoke and structural load. Rules that fail try to police taste.

Anyone who's chaired the BBQ-versus-no-BBQ vote knows a balcony is the part of an apartment owners feel most strongly about. It's the only outdoor space many residents have. It's also the most complicated piece of common property in the building. The slab carries the load of the unit above. The membrane below the tiles keeps water out of the apartment beneath. The balustrade keeps people inside, and the facade keeps the building looking like one building rather than thirty different ones.

Almost every balcony complaint is downstream of one of those four things going wrong. Smoke, water, weight, appearance. Committees that write rules around those four words tend to produce balcony by-laws that survive a tribunal. Committees that write rules about whether plants are tasteful tend not to.

Why the balcony is a strata pressure point

Three structural reasons.

The boundary is unintuitive. A resident standing on their balcony assumes they own everything they can see. The strata plan usually disagrees. In most NSW, Victorian and Queensland schemes the balcony floor surface is part of the lot, but the slab beneath, the waterproofing membrane between them, the balustrade, the external wall and any drainage outlets are common property. Some plans go further and treat the entire balcony as common property with exclusive-use rights for the owner.

The interface is dense. A 12 m² balcony can sit directly above another lot, beside two more, below a fourth, and form part of the public-facing facade. One decision, whether that's a heavy planter, a tiled-over membrane, a hooded BBQ or a smoking habit, can reach four or five other lots within minutes.

The economics are asymmetric. A failed waterproofing membrane can cost $25,000 to $80,000 to remediate once tiles, screed and membrane are removed. The original installation might have cost $4,000. Lannock Strata Finance and the major strata insurers consistently rank balcony waterproofing in the top three causes of building defect claims and major repair levies. The kicker is that the committee approving a quick decking job can produce a problem that outlives them.

The balcony boundary: lot vs common property

Before any rule, any approval, any enforcement step, read the plan.

Practical rule for committees: if the work touches a slab, a membrane, a balustrade, a facade element or a drainage point, treat it as a common property alteration and require a written approval pathway.

What you can do without approval (the short list)

Genuinely small. In most schemes:

• Free-standing potted plants that don't damage tiles, don't block drainage, aren't at risk of falling and sit within the slab's design load.
• Portable, lightweight outdoor furniture that can be brought inside in a wind warning.
• A portable, freestanding clothes airer that isn't visible above the balustrade and isn't fixed to common property.
• A single small windchime or decoration that isn't attached to the facade.
• The obvious things: sitting, eating, reading.

That's roughly the list. Almost everything else, fixed planters, decking, tiles, screens, awnings, hooks, BBQs, AC condensers, glazing, child safety modifications, sits in approval territory.

What needs approval (most things)

Each Australian state treats balcony alterations as some form of by-law-controlled change.

• NSW (SSMA 2015 ss 108–110). Cosmetic work is generally permitted; minor renovations need a general meeting resolution; major changes affecting common property need a special resolution and often a registered by-law. Most balcony alterations sit in the "minor" or "major" category.
• Victoria (OC Act 2006). Owners corporation rules govern alterations affecting common property. Even where the balcony floor is part of the lot, external surfaces are typically common property and require OC consent.
• Queensland (BCCMA Standard / Accommodation Modules). Improvements to a lot that affect common property require body corporate approval; some improvements need committee approval, others a general meeting.
• WA (STA 1985 as amended 2020). Schedule by-laws give the strata company authority over alterations to common property and use of "garden, lawn, balcony or veranda".

The headline message for residents is the same everywhere. If you're about to drill, fix, lay, weight or screen anything on your balcony, write to the committee first. Retrospective approval is harder than a prospective one, and a tribunal application to remove unauthorised work is the most expensive way to resolve it.

BBQs: smoke, gas bottles, fire risk

This is the perennial balcony fight, and the answer's more nuanced than "ban them" or "it's my balcony".

Smoke and the nuisance threshold

There is no national rule banning gas BBQs on apartment balconies. There is a consistent NCAT and VCAT pattern, though. Where a gas BBQ produces repeated, heavy, directed smoke that drifts into another lot, tribunals have been willing to treat it as a nuisance breach of the standard "not to use the lot in a way that causes nuisance or hazard" by-law. Single occasional uses rarely meet the threshold. Twice-weekly weekend use with neighbours documenting the smoke entering their living room often does.

The pattern in the cases is consistent: photographs, a complaint log, evidence of smoke entering windows, and a documented attempt at resolution before the tribunal application. Committees that hold this evidence win these orders. Committees with verbal complaints alone usually don't.

Gas bottles: AS/NZS 1596 and the NCC

Here's the part that most residents and many committees don't know.

AS/NZS 1596 governs the storage and handling of LP gas. For residential settings it sets quantity limits, ventilation requirements and separation distances. The practical effect on balconies:

• A 9 kg LPG cylinder is the largest size typically permitted on a residential balcony, and only where there's adequate ventilation. An open balcony usually qualifies. A fully enclosed winter garden often doesn't.
• Spare cylinders are generally not permitted to be stored alongside the in-use cylinder on a balcony in many schemes; the standard treats stored cylinders differently from connected ones.
• Cylinders must be upright, secured against falling, away from ignition sources and not in a position where a leak would pool against an opening.

The NCC adds fire-rating considerations for buildings of certain classes, particularly Class 2 buildings (apartments) where the balcony forms part of a fire-rated separation between sole-occupancy units. Some bodies corporate restrict gas BBQs on balconies under 2 m wide for this reason.

A by-law that says "no gas bottles over 9 kg, in-use cylinder only, secured upright, not within 1 m of any opening into another lot" tracks the underlying standard and tends to be enforceable. A by-law that says "no BBQs ever" without engineering or fire-safety basis tends to be challenged successfully.

Electric BBQs

Electric BBQs avoid the gas-bottle issues and most of the open-flame ones. They don't avoid the smoke-nuisance issue if used heavily. Most balcony rules now distinguish electric from gas, and a building wanting a workable middle path often permits electric BBQs subject to nuisance conditions while restricting gas BBQs by size and storage.

Plants and planters: weight, drainage, falling objects

Plants are the most underestimated balcony risk. Three reasons.

Weight. A 60 L planter at full saturation weighs roughly 80 kg. Three of them along a balustrade is a quarter-tonne point load on a slab edge. Balcony slabs are designed to AS 1170 with a residential live load typically around 2 kPa (200 kg/m²) plus an edge load allowance. Concentrated planters on a cantilevered edge are not what the engineer modelled. The committee that allows a row of 60 L olive trees on a 1990s balcony has changed the slab's loading assumption without engineering review.

Drainage. Pots that drain straight onto tiles produce a constant wet patch directly above the membrane. Self-watering pots that overflow do the same. Drip trays solve this if they're emptied. More often than not, they aren't. The water finds the lowest point of the membrane, which is usually the lot below's ceiling.

Falling objects. Planters fall. The Victorian and NSW pattern over the past decade includes multiple cases of pots blowing, knocking or tipping from balconies, sometimes onto cars, occasionally onto people. Public liability under the strata insurance policy and the lot owner's contents policy both come into play, and the lot owner who placed the planter is generally the first port of call for a personal-injury claim. A by-law that requires planters above a certain size to be on the inside line of the balustrade, secured against tipping, is a low-cost reduction in everyone's exposure.

A practical planter rule looks like:

• Pots over 30 L must sit on the inside line of the balustrade, not on or over it.
• Drip trays are required and must be emptied.
• No planter is to be hung on the outside face of the balustrade.
• Pots cannot block drainage outlets.
• Total planted weight on the balcony must not exceed [scheme-specific limit] without engineering certification.

Privacy screens and facade changes

Privacy screens are reasonable. Apartment balconies often look directly into the next lot's living room. Three considerations.

Cost and standard. Privacy screen panels run $300 to $1,200 per linear metre installed depending on material (timber batten, aluminium slat, perforated metal, frosted glass). Powered or fixed external awnings run $1,500 to $5,000. A scheme that approves screens should publish a single approved standard, covering material, colour, height, attachment method, so that the next ten applications can be processed quickly and the facade remains coherent.

Facade and approval. Anything attached to the external wall, balustrade or soffit is on common property and needs approval. A screen that adds wind load to a balustrade not designed for it is also a structural issue worth checking, particularly on higher floors where wind pressures rise sharply.

Wind uplift. Solid screens act as sails. A screen that's fine on level 3 may overload its fixings on level 14. Engineering certification for screens above a certain area is reasonable on tall buildings.

Drying laundry: visibility and by-law compliance

Laundry rules are an area where committees produce more friction than they need to.

The standard by-laws that exist in most schemes (NSW Schedule 3 By-Law 5 "obstruction", By-Law 4 in older schemes restricting laundry visibility, Vic OC model rules on appearance, Qld accommodation module by-laws) generally allow drying laundry within the lot but restrict the visibility of laundry above the balustrade line or hung on the facade.

A workable rule:

• Portable airers permitted, must sit below the balustrade line and not be visible from the street or other lots.
• No items hung over balustrades.
• No permanent lines fixed to common property without approval.
• No dripping water onto lots below. Wring items out before hanging.

That deals with the visibility concern without making the balcony unusable for residents who actually need to dry clothes there.

Decking and tiles: the waterproofing trap

Here's where the most expensive balcony decisions get made.

Balcony waterproofing is governed by AS 4654 (waterproofing of external walls and balconies) and the tile bedding by AS 3958. Together they specify falls, drainage, membrane laps, edge details and the relationship between the membrane and the wall. A correctly installed system has a design life of around 25 years.

Two common owner improvements break it.

Composite decking laid over tiles. Composite decking on a balcony runs $120 to $280/m² supplied and installed. Laid correctly, with a proper drainage layer and pedestal system that preserves the membrane and the falls, it's fine. Laid incorrectly, screwed through the tiles into the slab, blocking the falls, trapping water against the perimeter, it destroys the membrane within a few years. The lot below sees the result first, usually as a stained ceiling.

Raised tiles on pedestals. Same pattern. Raised tile systems can work on balconies, but they change the floor level above the membrane, alter the relationship with thresholds and door frames, and can block drainage if not designed properly.

The NCAT and OC tribunal pattern on unauthorised decking is consistent: orders to remove the decking at the lot owner's cost, plus contribution to any membrane remediation found necessary on inspection. A scheme that approves decking should require:

• Pedestal-mounted, removable system (no penetrations into the slab or membrane).
• Engineer or waterproofer's letter confirming the system doesn't compromise AS 4654 falls and drainage.
• Owner accepts responsibility for removing the decking when next membrane inspection or repair is needed.

This single approval condition saves more money than most other balcony rules combined.

For the underlying water risk picture, see Water Leaks From Above.

Smoking on balconies

Smoke drift between balconies is one of the fastest-growing complaint categories in Australian strata. The legal pattern is well established now. Both NSW SSMA and the Vic OC Act allow tribunals to treat persistent smoke drift as a breach of the standard nuisance by-law, and bans are now possible by special resolution in NSW with a model by-law structure.

We have a separate, fuller treatment of this. See Smoking on Balconies in Strata: What Tribunals Have Decided. For balcony rule purposes, the cross-reference to the smoking by-law (or its absence) should be in the same document as the BBQ and laundry rules so residents see the whole picture.

Pets, bird-feeding and food residues

Two everyday issues that rarely get a written rule until something goes wrong.

Pet faeces. Balcony pet toileting, dogs, cats, occasionally rabbits, produces drainage and odour problems and is usually a breach of the standard "cleanliness" by-law (NSW Schedule 3 By-Law 14 or its state equivalents). A specific rule covering it is unnecessary. Reminders that the existing by-law applies are enough.

Bird-feeding. Feeding pigeons, seagulls or cockatoos from a balcony attracts flocks, droppings, noise and occasionally structural damage from cockatoo chewing. Council public-health rules often already prohibit this in apartment areas, and most strata schemes can act under the nuisance by-law.

Food residues from BBQs. Grease running off a BBQ tray onto tiles and into drainage outlets is both a fire and a drainage issue. The BBQ rule should cover it.

Air-conditioning condensers

Condenser units mounted on balconies are now standard. They're also heavy, vibrating, water-emitting, common-property-attached objects. The balcony rule should cross-reference the AC approval pathway, not duplicate it. Bracket type, drainage of condensate, noise levels and visual screening all sit under the AC by-law if the building has one.

For the heat-and-ventilation picture, see Apartment Heat and Ventilation: Summer Readiness for Strata Buildings.

Child safety: window restrictors and balustrade gaps

Two specific obligations.

NCC Volume One Part D2.16 (residential balustrades) sets the minimum heights and the non-climbable zone:

• Minimum balustrade height: 1 m above the finished floor level.
• For floors more than 4 m above the ground or surface below, the minimum height rises to 1.2 m and a non-climbable zone applies between 150 mm and 760 mm above the finished floor (no horizontal elements that allow climbing).
• Openings in balustrades must not allow a 125 mm sphere to pass through.

Older buildings often have balustrades that no longer comply with current code. The committee isn't required to retrofit on demand, but where the original construction was below the code applicable at the time, or where alterations have reduced effective height (a deck raising the floor), retrofit may be required. A balcony deck that raises the floor by 50 mm reduces a 1 m balustrade to 950 mm and may push the building below code.

NSW window-restrictor law (SSMA 2015 s118). Owners corporations in NSW must ensure that windows in lots accessible to children have safety devices preventing the window opening more than 12.5 cm where the window is more than 2 m above the surface below. Several tribunal decisions have extended the analysis to balcony doors with low rails or sliding windows that function as access points. Where a balcony has a sliding stacker door with a child-sized opening, the safer position is to treat it as a window for restrictor purposes.

Glass balustrades and framing

Glass balustrades must be Grade A safety glass under the NCC and AS 1288. Two ongoing issues:

• Spontaneous breakage. Toughened glass can fail spontaneously due to nickel sulphide inclusions. The risk is low but not zero. A scheme with frameless glass balustrades should know whether the glass was heat-soaked at manufacture, which dramatically reduces this risk.
• Etching and cleaning. Some cleaning products and pool chemicals etch glass balustrades. The committee's cleaning specification matters.

Replacement of a frameless glass panel currently runs $800 to $2,500 depending on size, access and whether the surrounding system is bespoke.

State-by-state by-law starting points

The point of this table isn't "go read the act". It's to make sure the committee's balcony rule references the right statutory base and doesn't invent obligations the act doesn't support.

Insurance: who pays when something falls or fails

Three quick scenarios.

A planter blows off a balcony and damages a car. Strata insurance public liability often responds, and the lot owner's contents/landlord policy may also respond. Both insurers will look at whether the planter was secured. To be honest, an unsecured pot in a wind warning isn't a sudden and accidental event in the same way a freak gust is.

A waterproofing membrane fails and the lot below has ceiling damage. The strata policy generally responds to the building damage if the failure was sudden (e.g. a pipe burst) or accidental. Long-running membrane failure can fall into "wear and tear" exclusions, which is why the committee's maintenance and inspection records matter. The lot below's contents policy covers their damaged contents.

A glass balustrade panel spontaneously fractures. Generally a strata policy claim. The committee should confirm whether the glass was heat-soaked at original install, because that affects future risk discussions with the insurer.

For the broader water-damage picture, Flexi Hoses: The $80,000 Apartment Claim Almost Everyone Could Prevent covers the wear-and-tear exclusion in detail. The same logic applies to balcony membranes.

Common objections and extra checks

"It's my balcony, so it is private." Fair enough on the feeling, but the structure, membrane, facade, balustrade and drainage are often common property. The committee should separate private occupation from legal ownership before answering any request.

"The by-law is old, so everyone ignores it." A stale by-law is still a risk if the committee enforces it selectively. If the building has tolerated plants, screens or BBQs for years, the better path is usually a reset policy with a transition period, not sudden enforcement against one resident.

Check wind exposure and falling-object risk. The same planter or screen that's harmless on level 2 can become dangerous on level 18. Approval conditions should reflect height, prevailing wind, fixing method and whether anything can fall outside the lot.

Record photographs at approval and after installation. Balcony disputes often turn on whether the approved item changed later. A photo set at approval, completion and inspection gives the next committee evidence rather than a memory contest.

Committee checklist

1. Confirm the balcony boundary on the registered plan for a representative sample of lots.
2. Identify which surfaces and elements are common property.
3. Read the existing by-laws against the items in this article: BBQs, gas bottles, planters, screens, decking, smoking, AC condensers, child safety.
4. Publish a single approved standard for privacy screens and external attachments.
5. Require pedestal-mounted, non-penetrating systems for any approved decking, with a waterproofer's letter on file.
6. Set a planter weight and placement rule that reflects slab loading and falling-object risk.
7. Cross-reference the smoking by-law if one exists; cross-reference the AC by-law.
8. Schedule a balcony membrane inspection program. Every 5 to 7 years is the maintenance industry's typical recommendation.
9. Record every balcony approval with date, conditions, photographs and the by-law authority relied on.
10. Treat smoke, water and weight as evidence issues, not opinion issues.

Cross-references for residents

• Apartment Renovations in Strata: What Needs Approval in 2026: the broader approval framework that balcony alterations sit inside.
• Smoking on Balconies in Strata: What Tribunals Have Decided: the tribunal pattern and the model by-law options.
• Water Leaks From Above: what to do when a balcony membrane fails.
• Apartment Heat and Ventilation: Summer Readiness for Strata Buildings: AC condensers and balcony shading.
• Flexi Hoses: The $80,000 Apartment Claim Almost Everyone Could Prevent: the wear-and-tear exclusion that also applies to membranes.

How UnitBuddy fits

Balcony approvals are the kind of decision that haunts a building for a decade. One owner asks for composite decking on lot 14. Three years later the lot below has a stained ceiling, the membrane needs lifting, and nobody can find the original approval, the waterproofer's letter, or the photos taken at install. In practice, that's how a $4,000 decking job becomes a $60,000 special levy fight.

For balconies specifically, UnitBuddy holds:

• A per-lot balcony approval register covering privacy screens, decking, fixed planters, awnings, BBQ types, gas-bottle storage and AC condensers, with the by-law reference, the approved specification, the conditions and the photographs attached.
• The waterproofing record for each balcony stack, including original construction certificates, AS 4654 membrane inspection reports, leak history, repair quotes and claims correspondence, visible at the unit and the stack level.
• The smoking and nuisance complaints log, with timestamps, photos where lawful, and the by-law steps taken, ready for tribunal if escalation is needed.
• The structural-load record for heavy planter installations or decking changes, with the engineer's letter and any AS 1170 sign-off.
• Insurance correspondence relevant to balcony incidents such as falling objects, planter water damage, BBQ fires and balustrade glass failures, held alongside the renewal file.
• The standard balcony approval pack the committee issues to every applicant, so the same rules, conditions and evidence requirements apply consistently to lot 14 and lot 41.

You'd think a building would already have this. Most don't. The next committee inherits the precedent rather than reconstructing it from a former chairperson's inbox. A new owner buying lot 14 can see what was approved on that balcony, when, and on what basis. A waterproofer arriving for a membrane inspection on level 6 can pull the history of decking approvals on the affected stack before lifting a single tile. A buyer's lawyer doing strata diligence can see the building's actual balcony policy rather than reading a 90-page by-law pack and guessing how it has been applied.

UnitBuddy is built to support committees and the strata managers who advise them. The strata manager calls the meetings, issues the notices, advises on the by-laws. UnitBuddy holds the per-lot operational record, the approvals, the photos, the conditions, the precedent, that turns balcony rules from a fight every committee re-runs into a stable set of decisions the building has already made.

Further reading

• ACT: Can strata rules prevent clothes drying on apartment balconies? — via LookUpStrata
• QLD: Can balcony rules differ within the same building? — via LookUpStrata

Last updated: 6 May 2026. UnitBuddy publishes general information for Australian strata owners and committees. It is not legal, fire safety or engineering advice.