Licensed Granny Flat Specialist North Kellyville
NSW licensed builder delivering SEPP-compliant granny flats across North Kellyville 2155. BASIX, engineered slab (Class M), full certifier sign-off and 6-year structural warranty.
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MBA NSW0476 300 300Quick Answer
A granny flat in North 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.
Granny Flat Builder in North Kellyville
North Kellyville is one of the newest master-planned pockets in The Hills — 350 to 650m² blocks built through the 2010s, contemporary homes, and a young-family demographic sitting right against the Box Hill growth corridor. Granny flats work here, but as with all the newer estates, the block size does the deciding more than anything else.
On the blocks up near 650m² there's usually a comfortable footprint for a second dwelling once the house and setbacks are counted. On the tighter 350 to 450m² lots, a modern home already takes most of the block, so what's left for a compliant flat with proper separation can be tight — which is exactly why I survey before I promise a layout.
The ground is Wianamatta Shale, reactive, so the slab is engineered off a geotech. Standard Hills discipline, done properly rather than assumed.
Fixed price, survey-led on the tight blocks, licence HBL 487805C.
Buildana manages the full granny flat process in North 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 North Kellyville from $150K
- CDC fast-track approval (10–15 business days)
- 350–650m² blocks — most qualify for 60m² granny flat
- North 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 North Kellyville
- Free site assessment — near Bus to Kellyville Metro (3 km) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Block size is the deciding factor
North Kellyville is new and fairly tightly planned. On the larger 650m² blocks a second dwelling sits comfortably with its own yard. On the smaller 350 to 450m² lots, the modern house takes the lion's share, and once setbacks and the required separation are added, the remaining space can be marginal.
I won't sketch a layout on a tight block I haven't measured. I get the survey, work out what genuinely fits, and tell you straight — whether that's a clean one-bedroom, a compact build, or a recommendation to save your money. That's more useful to you than an optimistic promise.
Young-family market, tested ground
This is a young-family estate with the Metro a short bus ride away at Kellyville, so a second dwelling suits either a rental or accommodation for extended family. I build it to match the newer homes around it rather than dropping a cheap box in the yard.
The Wianamatta Shale is reactive, so the slab is stiffened and designed off a geotech report. Getting the ground right first is what keeps the fixed price stable once we start.
Granny flat builder in North Kellyville — key facts
- Suburb
- North Kellyville, NSW 2155
- Council / LGA
- The Hills Shire Council (The Hills)
- Primary zoning
- R2 Low
- Typical lot size
- 350–650m²
- Soil class
- M
- Median house price
- $1.4M–$1.9M
- Home era
- 2010s+ contemporary
- 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.
How It Works
From First Call to Final Key
Free on-site assessment of your North Kellyville property. We measure setbacks, check existing services, assess access, and confirm your 350–650m² block meets The Hills Shire Council's requirements for a secondary dwelling.
⏱60m² sounds tight on paper but designs well — high ceilings, good cross-ventilation, smart storage, and proper bedroom proportions make a 2-bed feel generous. We design for daily liveability, not just floor plan compliance.
⏱CDC fast-track through a private certifier — typically approved in 10–15 business days. North Kellyville is zoned R2 Low.
⏱Your granny flat is built from slab to keys in a single programme. Engineered slab for Class M soil, frame, lock-up, fit-out, painting, flooring, and external works.
⏱Defect-free inspection means we don't hand over a list to chase — every snag is fixed before keys move. Final clean, electrical and plumbing tested, smoke alarms certified, BASIX commissioning verified.
⏱Quality Promise
Every Buildana granny flat in North Kellyville is built under a fixed-price contract with full North Kellyville council compliance and a 6-year structural warranty.
Cost Guide
| Item | Estimated Range |
|---|---|
| Rental income model (North Kellyville 1-bed) | $180,000 – $230,000 |
| Family member (dependent living) | $200,000 – $270,000 |
| Teenager retreat / adult child | $170,000 – $220,000 |
| Home office / short-stay | $160,000 – $210,000 |
| Future main dwelling (build granny first, big house later) | $210,000 – $280,000 |
Prices are indicative for Western Sydney (2025). Actual costs depend on site, specifications, and approvals.
Our Team
Oliver Alameri
Founder / Director / Builder · MPropDev · PhD Student
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
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
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