Small Bathroom Renovations Sydney: Layouts and Budgets

What counts as a small bathroom, and what does it cost to renovate in Sydney?

A small bathroom is usually a room of about 3 to 4 m², such as a 1.8 m by 2.0 m apartment bathroom, an ensuite or a narrow terrace bathroom. As of October 2026, a full renovation of one in Sydney typically costs from about $11,500, according to What’s The Damage.

Source: What’s The Damage, small bathroom renovation cost Sydney (updated October 2026). Indicative only; not a quote.

The same guide prices an example 3.2 m² Sydney apartment bathroom, fully stripped out with the same layout, porcelain tiles and a frameless screen, at about $15,880 for the priced parts. That figure leaves out electrical work and project management, which are quoted separately.

National figures run lower. hipages figures reported by Savings.com.au (January 2026) put a budget or cosmetic bathroom job at about $8,000 to $15,000 across Australia. Sydney labour usually costs more than the national average, so treat that as the floor, not the target.

For a full breakdown of bathroom prices of every size, read our guide Bathroom Renovation Cost Sydney: 2026 Price Guide. This guide focuses on what is different about small rooms.

Why does a small bathroom cost so much per square metre?

Small bathrooms cost more per square metre because most of the work is a fixed job, not an area rate. What’s The Damage notes that certified waterproofing to AS 3740 costs much the same whether the floor is 3 m² or 8 m², and that each trade often needs a minimum half-day on site, however small the room.

A small room still needs demolition, a plumber, an electrician, a waterproofer, a tiler and a fit-off. Each one turns up, sets up and cleans up. That is why a 3 m² ensuite rarely costs half as much as a 6 m² family bathroom.

The good news is that tiles and fittings are a smaller share of the bill. You can often afford a better tile or tapware in a small room because you need so little of it.

Which layouts work best in a small bathroom?

The best small-bathroom layout is usually the one you already have, tidied up. Moving a toilet or floor waste means new drainage, new falls and new waterproofing, and in an apartment it can mean cutting into the slab.

Layout notes are general guidance. Your designer, plumber and waterproofer will confirm what suits your room.

A single-wall layout keeps all the pipes in one wall, which is simpler to plumb and often cheaper. A walk-in shower with no hob and a fixed panel makes a small room feel bigger, but the floor must fall to the waste correctly. The NCC Housing Provisions set falls to a floor waste of between 1:80 and 1:50.

Should you keep the layout or move the plumbing?

Keep the layout if it works, because moving fixtures is the most expensive change in a small bathroom. What’s The Damage puts plumbing rough-in in Sydney at about $2,300 to $5,750, and moving fixtures also adds re-waterproofing.

Moving plumbing can still be worth it if the current layout is unsafe or unusable, for example a toilet that blocks the door. Ask your plumber to price both options in writing.

• Houses: moving a toilet on a timber floor is often easier than on a concrete slab, but it may need new framing.
• Apartments: drains usually run through the slab into the unit below. Any new penetration can affect common property, so speak to your strata manager first.
• All homes: plumbing must be done by a licensed plumber at any value.

What space-saving choices make the biggest difference?

The choices that save the most space in a small bathroom lift fixtures off the floor and remove door swings. These are the options trades most often suggest:

• Wall-hung vanity: shows more floor, which makes the room look bigger and is easier to clean. A shallow-depth vanity gives back elbow room.
• In-wall cistern with a wall-faced toilet: saves depth, but needs a framed wall and an access panel for servicing.
• Frameless fixed panel or walk-in shower: no door swing and fewer frames to block the view.
• Recessed niche: storage for bottles without a shelf sticking out. It only works where the wall framing allows, and the niche must be waterproofed with the rest of the shower.
• Cavity sliding door: frees the space a hinged door needs, but the wall must be clear of pipes, wiring and structure.
• Recessed mirror cabinet: storage without losing basin space.
• Larger tiles: fewer grout lines can make a room feel bigger. Large-format tiles need a flatter surface and careful falls on floors, so ask the tiler what preparation is included.
• Good ventilation: an exhaust fan ducted outside helps a small room dry out and reduces mould.

Do you need strata or council approval for a small bathroom renovation?

In an apartment, yes: NSW strata rules treat a bathroom renovation, and any change that requires waterproofing, as a major renovation. Only the owners corporation can approve it, by special resolution at a general meeting. The work is approved if no more than 25 per cent of the value of the votes cast are against it.

Strata approval often comes with conditions. What’s The Damage notes that strata commonly ask for a copy of the waterproofing certificate and limit work to set hours. Ask your strata manager for the by-laws and any renovation application form before you book trades.

In a house, a like-for-like internal bathroom renovation rarely needs council approval, according to What’s The Damage. Approval questions come up if you move walls, change the structure or the home is heritage listed. Some internal alterations can be approved as complying development, according to the NSW Planning Portal. Check with your council or a private certifier if you are unsure.

What makes small apartment and terrace bathrooms harder in Sydney?

Access, old materials and neighbours make small Sydney bathrooms harder than the floor area suggests.

• Apartments: lift bookings, restricted hours and carrying waste through common areas can slow the job. What’s The Damage says apartment jobs can take longer for these reasons.
• Terraces and older houses: timber floors, uneven walls and old pipes are common. The NCC Housing Provisions require timber-based floors outside the shower to be waterproof, not just water resistant.
• Upstairs bathrooms: a leak shows up in the ceiling below, so waterproofing and flood testing matter even more.

Which NSW rules apply to a small bathroom renovation?

Even a small bathroom renovation usually crosses the $5,000 line where NSW rules start to apply.

• Licence: in NSW, residential building or trade work worth more than $5,000 in labour and materials (including GST) needs a contractor licence for that type of work. This includes waterproofing, wall and floor tiling, and kitchen, bathroom and laundry renovation.
• Plumbing and electrical work must be done by a licensed plumber or electrician, whatever the value of the job.
• Contract: jobs over $5,000 including GST need a written contract. Jobs over $20,000 need a more detailed contract and give you a cooling-off period of five clear business days.
• Deposit: the most you can be asked to pay as a deposit is 10 per cent of the contract price.
• Insurance: for work over $20,000, the contractor must give you a Home Building Compensation (HBC) certificate before taking any money.
• Warranties: NSW statutory warranties run for 6 years for major defects and 2 years for other defects. The Building Commission NSW lists waterproofing as an example of a major defect.
• Licence check: look up every trade on Verify NSW (verify.licence.nsw.gov.au). Check the name, licence class, expiry date and status match the business on your quote.

Get quotes for your small bathroom

Describe your bathroom to MyTradeCrew: the size, what stays, what moves, and whether you are in a house or an apartment. We’ll send it to up to three vetted, licensed and insured local trades from our crew. They quote and contract with you directly, and it is free for homeowners.

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