Granny Flat Builder Terrey Hills — From $150K Fixed Price
Fixed-price granny flat construction in Terrey Hills 2084. 1-bed from $150K, 2-bed from $185K. CDC approval, Northern Beaches Council compliant. No hidden extras.
HIA Member
MBA NSW0476 300 300Granny Flat Builder in Terrey Hills
Terrey Hills is acreage — 1 to 5 hectare-plus RU2 holdings in the bush, equestrian and horticultural in character. A granny flat here is a rural second dwelling, and the constraints are the serious rural ones: universal bushfire, deep sandstone, on-site servicing, and a drinking-water-catchment overlay on parts of the western edge.
On RU2 land the second dwelling generally goes through a development application, and the assessment carries real weight because of the environmental overlays. On acreage there's endless room to site it well — the process, not the space, is the work.
The bushfire rating is universal and often severe — BAL-29 up to Flame Zone — so the RFS building requirements shape the whole design. The sandstone is deep, so rock excavation can run $80,000 to $200,000-plus, and off sewer the flat needs an on-site wastewater system.
I build these fixed-price with the DA, bushfire, rock, servicing and any catchment controls all worked out first. Licence HBL 487805C.
Buildana manages the full granny flat process in Terrey Hills — 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 Terrey Hills from $150K
- CDC fast-track approval (10–15 business days)
- 1–5ha+ acreage (RU2) blocks — most qualify for 60m² granny flat
- Terrey Hills zoned R2 Low / R3 Medium (Manly, Dee Why, Brookvale, Mona Vale, Avalon town centres) / RU2 Rural Landscape (Ingleside, Terrey Hills, Duffys Forest, Oxford Falls) / E3/E4 Environmental on bushland fringe
- Fixed-price contract — design to handover
- Hawkesbury Sandstone — engineered slab included
- Rental yield $620–$900/week (beach proximity + Northern Beaches Hospital staff demand drives premium) in Terrey Hills
- Free site assessment — near Bus to Mona Vale (8 km) / St Ives (3 km) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Bushfire drives the whole design
Terrey Hills carries some of the most serious bushfire ratings you'll deal with — BAL-29 to Flame Zone is normal out here. That shapes everything: the construction, the materials, the defendable space, the firefighting water supply. The RFS building requirements aren't a formality, they're the design, and I'd rather you understand that from the start than meet it at DA stage.
There's a drinking-water-catchment overlay on parts of the western edge too, which adds to the assessment. I check whether your block is affected before I quote.
Deep rock, off-grid servicing
The sandstone out here is deep, so rock excavation can be a heavy cost — $80,000 to $200,000-plus on some blocks. I get a proper geotech bore, because on acreage a guess on the rock is a guess on tens of thousands of dollars.
Off sewer, the flat runs on tank water and an on-site wastewater system sized for the load, with vehicle access that suits both the build and emergency services. I sort all of it before the fixed price is set.
Granny flat builder in Terrey Hills — key facts
- Suburb
- Terrey Hills, NSW 2084
- Council / LGA
- Northern Beaches Council (Northern Beaches)
- Primary zoning
- R2 Low
- Typical lot size
- 1–5ha+ acreage (RU2)
- Soil class
- Hawkesbury Sandstone
- Median house price
- $3.5M–$8M+ acreage
- Home era
- 1970s–1990s rural + premium contemporary homesteads
- 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.
Quality Promise
Our Terrey Hills granny flat builds run on CDC fast-track where eligible. 10–15 business days to approval, 12 weeks to handover, fixed price.
How It Works
From First Call to Final Key
Everything that has to be right before we touch the ground. Free on-site assessment of your Terrey Hills property. We measure setbacks, check existing services, assess access, and confirm your 1–5ha+ acreage (RU2) block meets Northern Beaches 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.
⏱The Terrey Hills construction phase. Fixed price, programmed, supervised. CDC fast-track through a private certifier — typically approved in 10–15 business days. Terrey Hills is zoned R2 Low. Construction Certificate issued before works start. Your granny flat is built from slab to keys in a single programme. Engineered slab for Class Hawkesbury Sandstone soil, frame, lock-up, fit-out, painting, flooring, and external works. Quality inspections at every stage.
⏱The job isn't done when the site's clean; it's done when you have keys, certificates and warranties. 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. The unit is rental-ready, not project-paperwork-ready.
⏱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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Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Terrey Hills 2084. Northern Beaches Council regulations and local controls are covered on each page.