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

What this guide covers

• In nearly every Australian scheme the balcony structure is common property, even where the resident has exclusive use of its floor area. The slab, waterproofing membrane, balustrade and external wall almost never belong to the lot.
• Balcony waterproofing failure is regularly among the largest strata insurance and defect claims in Australia. Composite decking or raised tiles installed without engineering review can damage a membrane designed to last about 25 years.
• BBQ smoke, planter weight, falling objects, gas bottle storage, smoking drift, balustrade gaps and air-conditioning condensers are everyday balcony issues governed by codes, standards or tribunal cases.
• Most balcony alterations need owners corporation approval. The exceptions are narrower than residents assume, and an approved screen on lot 12 can set a precedent for the building.
• Rules that work focus on safety, drainage, smoke and structural load. Rules that fail try to police taste.

Anyone who's chaired a BBQ vote knows how strongly people feel about balconies. For many residents, it is their only outdoor space. It is also one of the building's most complex pieces of common property. The slab carries the unit above, the membrane below the tiles keeps water out of the apartment beneath, and the balustrade and facade affect everyone who lives nearby.

Most balcony complaints come back to the same four things: smoke, water, weight and appearance. Rules built around those issues are more likely to hold up than rules about whether plants are tasteful.

Why the balcony is a strata pressure point

There are three main 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 major strata insurers regularly rank balcony waterproofing among the leading causes of building-defect claims and major repair levies. A quick decking approval can leave the building with a problem long after the committee has changed.

The balcony boundary: lot vs common property

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

Element	Usual position	Why it matters
Floor surface (tiles, paint)	Lot in some schemes, common property in others; check the plan	Determines who repairs cracked tiles vs membrane below
Waterproofing membrane	Common property in nearly every scheme	Governed by AS 4654; failure affects the lot below
Structural slab	Common property	AS 1170 loads; planter and decking weight are committee concerns
Balustrade (glass, metal, masonry)	Common property	NCC D2.16 height and non-climbable zone rules apply
External wall and soffit	Common property	Drilling, mounting, painting almost always needs approval
Drainage outlets and downpipes	Common property	Blocking or covering them shifts liability sharply
Air-conditioner condenser bracket	Often common property even where the unit is the lot owner's	Brackets penetrate the facade or sit on common slab

For committees, the working rule is simple: if work touches a slab, membrane, balustrade, facade element or drainage point, treat it as a common-property alteration and require written approval.

What you can do without approval (the short list)

The list is short. 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.
• Everyday use, such as sitting, eating and reading.

That is about it. Fixed planters, decking, tiles, screens, awnings, hooks, BBQs, AC condensers, glazing and child-safety modifications usually need approval.

What needs approval (most things)

Each state has its own approval pathway for balcony alterations.

• NSW (SSMA 2015, sections 108 to 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".

If you plan to drill, fix, lay, load or screen anything on a balcony, write to the committee first. Retrospective approval is harder to obtain, and an order to remove unauthorised work is an expensive way to settle the issue.

1. 01
   Resident plans balcony change
2. 02
   Check plan: lot vs common property
3. 03
   Submit written approval request
4. 04
   Committee assesses safety and load
5. 05
   Conditions and by-law recorded
6. 06
   Photos taken at install and inspection

BBQs: smoke, gas bottles, fire risk

BBQs are a recurring balcony dispute. The answer turns on smoke, gas storage and fire safety.

Smoke and the nuisance threshold

There is no national ban on gas BBQs on apartment balconies. NCAT and VCAT decisions tend to treat repeated, heavy smoke drifting into another lot as a nuisance breach of the standard "not to use the lot in a way that causes nuisance or hazard" by-law. A single occasional use rarely meets that threshold. Regular weekend use may, particularly where neighbours record smoke entering their living room.

Tribunal cases usually turn on photographs, a complaint log, evidence of smoke entering windows and a documented attempt at resolution before the application. Committees with that evidence win these orders more often than committees relying on verbal complaints alone.

Gas bottles: AS/NZS 1596 and the NCC

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 some buildings, particularly Class 2 apartment buildings 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 that reason.

A by-law limiting bottles to 9 kg, allowing an in-use cylinder only, and requiring it to be upright, secured and at least 1 m from an opening into another lot follows the standard. A blanket ban without an engineering or fire-safety basis is more likely to be challenged.

Electric BBQs

Electric BBQs avoid gas-bottle issues and most open-flame risks. Heavy use can still create a smoke nuisance. Many balcony rules distinguish electric from gas, permitting electric BBQs subject to nuisance conditions while restricting gas BBQs by size and storage.

Plants and planters: weight, drainage, falling objects

Plants create three often-overlooked balcony risks.

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 leave a constant wet patch above the membrane. Self-watering pots can do the same when they overflow. Drip trays help only if they are emptied. Otherwise water finds the lowest point of the membrane, often the ceiling of the lot below.

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 can be reasonable where balconies look directly into the next lot's living room. Consider the following.

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 often create 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 addresses visibility without preventing residents from drying clothes on the balcony.

Decking and tiles: the waterproofing trap

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 can damage the system.

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

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 condition helps avoid membrane damage.

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

Smoking on balconies

Smoke drift between balconies is a common strata complaint. Both the NSW SSMA and Victorian OC Act allow tribunals to treat persistent smoke drift as a breach of the standard nuisance by-law. NSW schemes can also adopt a smoking ban by special resolution using a model by-law structure.

See Smoking on Balconies in Strata: What Tribunals Have Decided for more detail. The balcony rules should cross-reference the smoking by-law, if there is one, alongside the BBQ and laundry rules.

Pets, bird-feeding and food residues

Two everyday issues often go without a written rule until there is a problem.

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 on balconies are common. They are heavy, can vibrate and drain water, and often attach to common property. The balcony rule should refer to the AC approval pathway rather than duplicate it. Bracket type, condensate drainage, noise and visual screening belong in the AC by-law where 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 requirements matter here.

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

Jurisdiction	Primary instrument	What to read first
NSW	SSMA 2015 + Schedule 3 standard by-laws	By-laws 4 (laundry), 5 (objects on balconies) and 14 (cleanliness); ss 108 to 110 on alterations; s 118 window restrictors
Vic	OC Act 2006 + model rules	Rules on common-property use, alterations and behaviour; balcony external surfaces as common property
Qld	BCCMA 1997 + Standard / Accommodation Module	Improvements to a lot affecting common property; appearance and nuisance by-laws
WA	STA 1985, as amended in 2020	Schedule 1 and 2 by-laws; "garden, lawn, balcony or veranda" provisions
SA	Strata Titles Act 1988 / Community Titles Act 1996	Articles or scheme description; common property and exclusive use
Tas	Strata Titles Act 1998	Schedule of by-laws; alteration approvals
ACT	Unit Titles (Management) Act 2011	Default rules; common-property use
NT	Unit Titles Act 1975 / Unit Title Schemes Act 2009	Scheme statement and management module

Use the table to check that the committee's balcony rules have the right statutory basis and do not impose obligations the Act does not 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 or landlord policy may also respond. Both insurers will look at whether the planter was secured. An unsecured pot left out during a wind warning is different from one hit by a freak gust.

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.

The balcony structure is usually common property

Occupation of a balcony feels private. Ownership of the structure usually is not. In a typical building-format plan the slab, the waterproofing membrane, the balustrade, the external face and the drain body sit on the common-property side of the line. The owners corporation must keep those elements working. In New South Wales that is section 106 of the Strata Schemes Management Act 2015. In Victoria it is section 46 of the Owners Corporations Act 2006. Queensland’s Body Corporate and Community Management Act 1997 often treats balcony membranes as body corporate on a building-format plan. Western Australia’s Strata Titles Act 1985 follows the registered boundary. Read the plan before anyone is told “it’s your balcony, you pay.”

A privacy screen, composite decking, a through-wall condenser or a new colour on the balustrade is an alteration. In NSW that generally needs more than a committee nod. Waterproofing work is not a section 110 minor renovation. Changing appearance engages section 108. If future maintenance of the new membrane is to sit with the renovating owner, pair the approval with a section 142 by-law. Victoria uses section 52 for a significant change of appearance.

Window safety devices on relevant NSW windows are a scheme duty under section 118. A screen or restrictor that a renovator removes is a defect the next inspection will find.

BBQ smoke and hanging laundry are by-law problems. Enforce with a section 146 notice, a Victorian section 155 notice, or a Queensland section 182 notice. A one-off Sunday steak is unlikely to reach the tribunal threshold; weekly smoke that fills the lot above may. The smoking post is the companion. Gas bottles have their own storage limits, even where a by-law does not mention them.

A failed membrane that stains the ceiling below is a section 106 file in NSW if the membrane is common property. Vickery confirmed damages under section 106(5). The waterproofing guide is the state-by-state split. Do not recarpet downstairs while the balcony above is still open.

Keep the approval, the waterproofer’s letter and the install photos in the building’s own records. Balcony arguments ten years later are won on that file.

How UnitBuddy fits

Balcony approvals need a durable record. An owner may install composite decking on lot 14, then three years later the lot below has a stained ceiling and nobody can find the approval, waterproofer's letter or installation photos. That is how a $4,000 decking job can become a $60,000 special-levy dispute.

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.

Many buildings do not have this record. The next committee then inherits a precedent without the documents behind it. A new owner buying lot 14 can see what was approved, when and on what basis. A waterproofer inspecting level 6 can check the history of decking approvals for that stack before lifting a tile. A buyer's lawyer can see the building's actual balcony policy rather than infer it from a 90-page by-law pack.

UnitBuddy supports committees and the strata managers who advise them. The strata manager calls meetings, issues notices and advises on by-laws. UnitBuddy keeps the per-lot record of approvals, photos, conditions and precedents so future committees can find the decisions already made for the building.

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.

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