Granny Flat Builder Kellyville — From $150K Fixed Price
Fixed-price granny flat construction in Kellyville 2155. 1-bed from $150K, 2-bed from $185K. CDC approval, The Hills Shire Council compliant. No hidden extras.
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MBA NSW0476 300 300Quick Answer
A granny flat in Kellyville costs $150,000–$300,000+ depending on size and finishes. 1-bed from $150K, 2-bed from $200K. CDC fast-track approval in 10–15 business days. Buildana manages design, The Hills Shire Council approval and fixed-price construction.
Building Granny Flats in Kellyville
Kellyville is master-planned Hills — 500 to 800m² blocks, contemporary brick and rendered homes from the 1990s and 2000s, and a Metro station right in the suburb. That last part matters: the Metro turned Kellyville into a genuine commuter suburb, and a well-built granny flat here has a real rental market behind it.
The blocks are a reasonable size, so most suit a second dwelling comfortably. On the tighter end near 500m², once you count the existing house, its setbacks and the required separation, space gets snug — so on those I let the survey settle it rather than promising a layout blind.
The ground is Wianamatta Shale, reactive, so the slab is engineered off a geotech. Standard Hills discipline.
Fixed price with the survey and soil sorted first. Licence HBL 487805C.
Buildana manages the full granny flat process in Kellyville — from site assessment and CDC fast-track approval through to fixed-price construction and handover. We build studio, 1-bedroom, and 2-bedroom designs up to the NSW maximum of 60m².
Read our Complete Granny Flat Guide or explore granny flat builds across Sydney.
- Granny flats in Kellyville from $150K
- CDC fast-track approval (10–15 business days)
- 500–800m² blocks — most qualify for 60m² granny flat
- Kellyville zoned R2 Low / RU2 Rural Landscape (acreage belt) / R1/R3 (Sydney Metro Northwest precincts)
- Fixed-price contract — design to handover
- M — engineered slab included
- Rental yield $520–$780/week (large lots support generous siting) in Kellyville
- Free site assessment — near Kellyville (Sydney Metro Northwest, in suburb) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
The Metro makes the case
Before the Metro, Kellyville was a car-dependent estate suburb. Now it's a commuter address, and that changed the granny flat maths — a tidy flat here lets to people who want the train, not just the space. The family demand was always strong; the Metro added the rental layer.
On the standard 500 to 800m² blocks there's room to place the flat with its own access and yard. It's a straightforward, well-understood build in this suburb.
Where the survey decides
On the tighter master-planned blocks near 500m², the numbers get close — the existing house, its setbacks and the separation the second dwelling needs can eat the yard fast. Rather than promise a layout that might not fit, I get the survey done and let the block tell us what's real.
The Wianamatta Shale is reactive, so the slab is stiffened and designed off a geotech. Getting the ground right first keeps the fixed price honest. I won't quote a weekly rent I can't back, but the demand off the Metro is strong.
Granny flat builder in Kellyville — key facts
- Suburb
- Kellyville, NSW 2155
- Council / LGA
- The Hills Shire Council (The Hills)
- Primary zoning
- R2 Low
- Typical lot size
- 500–800m²
- Soil class
- M
- Median house price
- $1.8M–$2.6M
- Home era
- 1990s–2010s
- Typical price range
- $150,000 – $300,000+
- Typical timeline
- 4–6 months design to handover
- Approval pathway
- CDC via NSW Affordable Rental Housing SEPP (10–15 days)
Want a real number for YOUR block — not a generic estimate?
Free site assessment, fixed-price contract, line-itemised quote within 48 hours. No high-pressure sales — just a real builder talking real numbers.
Cost Guide
| Item | Estimated Range |
|---|---|
| Attached granny flat | $160,000 – $220,000 |
| Detached granny flat | $190,000 – $270,000 |
| Above-garage granny flat | $230,000 – $310,000 |
| Premium detached (upgraded finishes) | $270,000 – $330,000 |
Prices are indicative for Western Sydney (2025). Actual costs depend on site, specifications, and approvals.
How It Works
From First Call to Final Key
Most Kellyville blocks support a granny flat — the question is where it sits, how it accesses the street, and how it shares the yard with the main house. We work that out on site, with the existing house and existing services in front of us.
⏱1-bed or 2-bed floor plan designed for your Kellyville block — up to the NSW maximum of 60m². Layout, window placement, kitchen and bathroom positioning optimised for liveability and rental appeal.
⏱We lodge your CDC application with all required documentation — BASIX, plans, site analysis, stormwater. Private certifier approval in 10–15 business days. CC issued and you're ready to build.
⏱12-week typical timeline for a 60m² 2-bed: slab pour week 1, frame stand weeks 2–3, lock-up week 5, internal fit-out weeks 6–10, finishes and external works weeks 11–12. We provide the dated programme upfront so you can plan move-in or tenant placement.
⏱OC issued, defect-free inspection completed, keys handed over. Your granny flat is ready to occupy or lease. Well-finished 2-bed units near Kellyville (Sydney Metro Northwest, in suburb) station are achieving $520–$780/week (large lots support generous siting) per week.
⏱Our Team
Oliver Alameri
Founder / Director / Builder · MPropDev · PhD Student
Ahmad Alameri
Accounts Manager
Claire Wendell
Project Manager
Estimate Your Build Cost
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Still got questions? Talk to Oliver directly.
30-min free call — bring your block, your brief, your budget. We'll map out feasibility, timeline, and realistic cost. No sales pitch.
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
Headquartered in Western Sydney's Fairfield. Active across all 28 metropolitan Sydney LGAs — from Penrith to the Eastern Suburbs, the Hills to the Sutherland Shire.
Last updated: 1 July 2025
Granny Flat on Your Kellyville Block
Free site assessment for Kellyville 2155. We'll check your block, recommend the best design, and provide a fixed-price quote.
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Other Buildana services in Kellyville
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Kellyville 2155. The Hills Shire Council regulations and local controls are covered on each page.