Granny Flat Builders Sydney — Sydney’s Secondary Dwelling Specialists
Custom granny flats up to 60m². CDC approved in 10–15 business days. Fixed price, across Sydney. 1, 2 & 3 bedroom designs from $120K.
HIA Member
MBA NSW0476 300 300Quick Answer
Granny flat builders in Sydney: 1-bed from $120,000, 2-bed from $160,000, 3-bed/master from $210,000. CDC approval in 10–15 business days. Construction 12–16 weeks. Buildana builds across Sydney on fixed-price contracts with no hidden costs.
The Fastest Way to Add Value, Income & Space to Your Property
Granny flat builders who know Sydney inside out. Whether you're building for rental income ($380–$520/week across Sydney), for aging parents who want to stay close, or for adult children who need their own space — Buildana designs, approves and builds granny flats on a fixed-price contract with no surprises.
Under SEPP (Housing) 2021 Part 2 Division 2, you can build a secondary dwelling up to 60m² on residential lots of 450m² or more. Most granny flats qualify for CDC approval through a private certifier — 10–15 business days, no council queue, no neighbour notification. Buildana manages the entire process across Sydney — including Fairfield, Liverpool, Cumberland, Canterbury-Bankstown and Blacktown.
We handle everything: free block eligibility check, custom floor plan, CDC or DA lodgement, construction, separate metering, and handover. Every granny flat comes with a 6-year structural warranty under the Home Building Act 1989. The price in your contract is the price you pay.
- CDC fast-track approvals — 10–15 business days
- 1-bed from $120,000 · 2-bed from $160,000 · 3-bed/master from $210,000
- Self-contained with kitchen, bathroom, laundry & separate metering
- Rental returns $380–$520/week across Sydney
- 12–16 week construction from slab to keys
- Fixed-price contracts — no hidden costs, no variations
- BASIX and NCC 2022 compliance included
- Free block eligibility check within 24 hours
Granny Flat Gallery
Explore recent granny flat builds — modern designs, quality finishes, built to last.
NSW Granny Flat Rules — What You Need to Know
Under SEPP (Housing) 2021 Part 2 Division 2, secondary dwellings (granny flats) are permitted on residential land across NSW. Here are the key rules that determine what you can build.
| Requirement | Standard |
|---|---|
| Minimum lot size | 450m² with 12m street frontage (CDC pathway) |
| Maximum floor area | 60m² internal habitable area |
| Rear setback | 3m minimum |
| Side setback | 0.9m for lots ≤900m² |
| Eligible zones | R1, R2, R3, R4, RU5 |
| Dwellings per lot | 1 secondary dwelling per residential property |
| Approval pathway | CDC (10–15 days via private certifier) or DA |
| Governing legislation | SEPP (Housing) 2021 Part 2 Division 2 |
DA pathway is available when CDC requirements aren't met — for example, blocks under 450m², heritage conservation areas, or flood-affected land. Buildana manages both pathways and advises which applies to your property before any design work begins.
Buildana provides a free block eligibility check — we confirm whether your property qualifies for a granny flat within 24 hours.
Granny Flat Designs — 1, 2 and 3 Bedroom Options
1-Bedroom Studio
35–45m² · From $120,000
Open-plan living, kitchen and dining. Separate bedroom. Full bathroom. Perfect for singles, couples, or rental yield. Compact but comfortable — suits smaller backyards and tighter setbacks.
- Open-plan living/kitchen/dining
- Separate bedroom with wardrobe
- Full bathroom with shower
- Covered entry or verandah
- Internal laundry
2-Bedroom Standard
50–60m² · From $160,000
The most popular granny flat design in Sydney. Two bedrooms, open-plan living and kitchen, full bathroom, separate laundry. Suits families, multi-generational living, or strong rental returns.
- 2 bedrooms with built-in wardrobes
- Open-plan living/kitchen/dining
- Full bathroom with bath or shower
- Separate internal laundry
- Covered outdoor area
3-Bedroom / Master
55–60m² · From $210,000
Maximum use of the 60m² allowance. Three bedrooms or two plus a study. Master granny flat designs command higher rents — $500–$650/week in high-demand suburbs.
- 3 bedrooms or 2 bed + study
- Open-plan living/kitchen/dining
- Full bathroom
- Separate laundry
- Covered entry and private outdoor area
All Buildana granny flat designs include accessible/adaptable options for clients who need step-free access, wider doorways, or grab rails. We also design for specific block constraints — narrow rear yards, sloping sites, and properties with existing trees or structures that need to be worked around.
Granny Flat Rental Income — The Numbers for Sydney (2025)
Granny flats are one of Sydney's strongest property investment plays. Low build cost, high rental demand, and genuine capital value uplift.
| Granny Flat Type | Weekly Rent | Annual Income |
|---|---|---|
| 1-bed studio | $320–$420 | $16,640–$21,840 |
| 2-bed standard | $420–$520 | $21,840–$27,040 |
| 3-bed / master | $500–$650 | $26,000–$33,800 |
Investment Return
A 2-bed granny flat costing $180,000 renting at $450/week delivers ~13% gross return. That's significantly higher than any other property investment in Sydney.
Capital Value Uplift
Granny flats typically add $150,000–$280,000 to property value in Sydney. That means your build cost is often recovered immediately through increased equity.
Suburbs near train stations — Cabramatta, Fairfield, Canley Vale, Liverpool, Bankstown, Seven Hills — command the highest rents. Properties close to hospitals, schools and shopping centres also attract strong tenant demand.
Granny Flat Builders Across Sydney — Your LGA, Your Council
Fairfield LGA
Fairfield has some of Western Sydney's strongest granny flat demand. Established suburbs like Cabramatta, Bonnyrigg, Smithfield, Canley Heights, Wetherill Park, Bossley Park, Edensor Park, Prairiewood, Carramar, and Villawood have large residential lots (600m²+) well-suited to secondary dwellings. Fairfield LEP 2013 permits granny flats in R2 and R3 zones. Buildana has built extensively across Fairfield City Council — we know the setback requirements, stormwater expectations, and CDC standards specific to this LGA.
Liverpool LGA
Liverpool's growth corridor — Edmondson Park, Middleton Grange, Austral, Leppington — features newer housing stock on lots that typically meet the 450m² minimum. Established suburbs like Liverpool, Casula, Prestons, Moorebank, Hinchinbrook, Cecil Hills, West Hoxton, Green Valley, and Lurnea offer strong rental markets close to Liverpool CBD, hospital and train station. Liverpool LEP 2008 applies. Some flood-affected areas along Georges River require DA pathway.
Cumberland LGA
Cumberland's older housing stock in Merrylands, Guildford, Auburn, Granville, Wentworthville, Greystanes, Pemulwuy, Berala, Girraween, Regents Park, Lidcombe, and Pendle Hill means generous block sizes ideal for granny flats. Cumberland LEP 2021 applies. Some heritage conservation areas in Granville restrict CDC eligibility — Buildana advises on DA alternatives where needed.
Canterbury-Bankstown LGA
High rental demand around Bankstown, Campsie, Lakemba, Greenacre, Padstow, Revesby, Punchbowl, Yagoona, Chester Hill, Condell Park, Panania, and East Hills. Canterbury-Bankstown LEP 2023 applies. Metro TOD precincts around Bankstown and Campsie stations are seeing rezoning — granny flats on properties near these precincts can attract premium rents.
Blacktown LGA
Blacktown is Sydney's largest LGA with varied housing. Established suburbs like Seven Hills, Quakers Hill, Doonside, Rooty Hill, Kings Langley, Woodcroft, and Marayong have older homes on large lots suitable for granny flats. Newer areas like Marsden Park, Schofields, Stanhope Gardens, and The Ponds have smaller lots — some meet the 450m² threshold, others don't. Blacktown LEP 2015 applies. Some properties in northern Blacktown have bushfire risk overlays.
Granny Flat Builders by Suburb
Suburb-specific granny flat guides — local lot sizes, council requirements, and construction costs.
Have a question about your project?
Talk to our team — free site assessment and fixed-price quote.
How It Works
From First Call to Final Key
We visit your property within 48 hours and check eligibility: lot size (minimum 450m²), zoning (R1, R2, R3, R4, RU5), setbacks, access, services distance, and any LGA-specific requirements.
⏱Custom floor plan designed to maximise space, natural light, and function within the 60m² limit. 1, 2 or 3 bedroom layouts. 3D renders and elevations included.
⏱BASIX certificate, structural engineering, soil report coordination, stormwater plan, and all certifier documentation prepared by Buildana.
⏱Lodged with an accredited private certifier. Typical turnaround 10–15 business days. No council queue, no neighbour notification. DA pathway available if CDC is not eligible.
⏱Slab, frame, lock-up, fit-out and finishing. Most granny flats complete within 12–16 weeks. Weekly progress updates from your project manager.
⏱Final inspection, Occupation Certificate, keys, 6-year structural warranty, maintenance guide. Move-in or rent-ready from day one.
⏱Our Team
Oliver Alameri
Founder / Director / Builder
Ahmad Alameri
Accounts Manager
Claire Wendell
Project Manager
Estimate Your Build Cost
Use our free calculator to get an instant cost estimate for your project
Cost Guide
| Item | Estimated Range |
|---|---|
| Studio / 1-bedroom (35–45m²) | $120,000 – $160,000 |
| 2-bedroom standard (50–60m²) | $160,000 – $200,000 |
| 2-bedroom quality finishes | $200,000 – $250,000 |
| 3-bedroom / master granny flat | $210,000 – $270,000 |
| CDC approval & certifier fees | $3,000 – $8,000 |
| Site preparation & services | $8,000 – $20,000 |
| Separate metering (elec + water) | $3,000 – $6,000 |
Prices are indicative for Western Sydney (2025). Actual costs depend on site, specifications, and approvals.
Ready to take the next step?
Free consultation — no obligation, no pressure.
Frequently Asked Questions
“Buildana built our granny flat in just 12 weeks. Fast approvals, great communication, and a beautiful final product. Highly recommend.”
Fatima Al-Rashid
Liverpool, NSW
We Build Across Sydney
Buildana builds across greater Sydney — with deep roots in Western Sydney's Fairfield, Liverpool, Cumberland, Canterbury-Bankstown, and Blacktown LGAs.
Last updated: 1 July 2025
Get Your Free Granny Flat Site Assessment
Block eligibility check within 24 hours. We'll tell you what you can build, what it costs, and how fast we can get it approved.
Start Your Project