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Buildana — Custom Home Builders Sydney

Granny Flat Builder — Western Sydney

Secondary dwellings built CDC-fast, with rental yield modelled before you sign.

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Granny Flat Builder across Western Sydney

Granny flat demand across Western Sydney has shifted from 'somewhere for the in-laws' to a serious income strategy as mortgage rates and household costs hold high. A well-built secondary dwelling on a Fairfield, Liverpool or Bankstown block is currently producing $380–$560 per week in gross rental — usually paying off the build inside 7–10 years on borrowed money. Buildana models that yield against your specific suburb's rental data, your block's CDC eligibility, and your borrowing position before any concept design — so you're not building blind.

Scope covers feasibility and CDC pathway check, full design and documentation, structural engineering for the soil class on your block (Class M, H or higher across the LGAs we work in), BASIX, Complying Development Certificate lodgement, all construction trades, separate metering, separate waste service, parking allocation if required, and final occupation certificate. We build attached and detached secondary dwellings from 60m² to the 60m² CDC max, with one and two-bedroom configurations and full kitchen-laundry-bathroom layouts.

Why Buildana for your build

CDC-compliant by design

Setback dimensions, height, parent-dwelling separation, BASIX and parking are all engineered to clear CDC in 10–15 business days. We don't lodge ambitious designs that bounce back after weeks of certifier RFIs.

Yield modelled, not guessed

We pull recent comparable rentals for your suburb (CoreLogic / market sources) and model gross yield, vacancy allowance, agent fees and depreciation before you commit to the build cost.

Fixed price, no allowance games

Tile, tap, oven, rangehood, flooring, paint colour, electrical points and joinery are all specified and signed off before contract. The price you sign is the price you pay.

Tenanted-property build sequencing

If your main dwelling is tenanted we run the programme to minimise disruption — site access timing, noise hours, and connection isolations all coordinated with you and your property manager.

How the process runs

Granny flat programme: 1–2 weeks feasibility (yield model, CDC eligibility, soil and survey), 3–4 weeks documentation pack, 10–15 business days CDC issue, 1 week Construction Certificate, then 10–16 weeks construction depending on size and site access. Most CDCs we lodge clear in 12 business days clean. From signed contract to tenant in place, realistic envelope is 5–7 months. We give you a dated programme and weekly written progress through the build.

Suburbs we build in

Buildana works across five Western Sydney LGAs. Pick your suburb to see local feasibility notes, council process, soil class, and indicative cost ranges relevant to your block.

Common questions

Is my block eligible for a granny flat under CDC?

Most R2 and R3 blocks above 450m² in Western Sydney are eligible if the parent dwelling has a clean separation envelope, side and rear setbacks meet the SEPP, and there's space for a parking bay. Heritage blocks, flood-prone land, and very narrow frontage lots sometimes need a DA pathway instead. We check your block in the first feasibility call.

How much does a 60m² granny flat cost in Western Sydney 2026?

Indicative range $180K–$240K turnkey for a 60m² two-bedroom build on a standard site, including demolition of any small existing structure, slab on Class H soil, separate metering and connection upgrades. Class S or P sites push the lower end down; difficult access or significant tree clearing pushes the upper end up. We quote fixed-scope after site investigation.

What rental yield should I expect?

Across the suburbs we work in, two-bedroom granny flats are currently leasing at $380–$560 per week depending on suburb (Auburn, Lakemba, Bankstown trend higher; outer Blacktown LGA lower). Gross yield typically 9–13% on the build cost. We model this for your specific suburb before contract.

Will it affect my home's resale value?

Generally yes — positively. Investor buyers value the income stream and owner-occupiers value the multi-generational option. The lift varies by area and how integrated the build looks against the main dwelling. Poorly designed grannies can hurt resale; ours are designed to add value.

Do I need a separate water meter and electrical?

We separate meter all our builds — separate water, separate electrical, often separate gas where available. That's the cleanest setup for tenant billing, future subdivision considerations, and dispute avoidance. Costs around $4–$8K depending on existing connections.

Ready to talk through your block?

Free, no-obligation feasibility — fixed-scope quote within 7 days.

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