Granny Flat Double Bay — Design, Approval, Build, Connection
Complete granny flat delivery in Double Bay 2028: design, CDC or Woollahra Municipal Council approval, separate services connection, engineered slab, full build and handover under one fixed-price contract.
HIA Member
MBA NSW0476 300 300Double Bay Secondary Dwellings
I'll be straight about a granny flat in Double Bay: it depends heavily on the block, because this is a mix of harbourside apartments, inter-war flats and grand freestanding homes on 250 to 1,000m² blocks. Much of it is strata or too tight for a detached secondary dwelling — but the larger freestanding lots clear the 450m² Housing SEPP threshold and can take a guest studio or multigenerational space.
Where it works, it's a premium build. Heritage Conservation Areas cover most streets, so a secondary dwelling almost always goes through a full DA rather than the fast CDC path, and the sandstone ground with substantial harbour fall means engineered foundations and often rock work.
So the honest first step is the survey and title check — is it a freestanding lot clearing 450m², or strata and tight? I'll tell you plainly before you spend on design.
We build to the standard the address demands, fixed-price, licence HBL 487805C.
Buildana manages the full granny flat process in Double Bay — 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 Double Bay from $150K
- CDC fast-track approval (10–15 business days)
- 250–1,000m² blocks — most qualify for 60m² granny flat
- Double Bay zoned R2 Low / R3 Medium / R4 / B2/B4 mixed
- Fixed-price contract — design to handover
- M — engineered slab included
- Rental yield $700–$1,400/week in Double Bay
- Free site assessment — near Edgecliff (1 km, ferry to Circular Quay) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Depends on the block
Double Bay mixes harbourside apartments, flats and grand freestanding homes on 250 to 1,000m² blocks — much of it strata or too tight, but the larger freestanding lots clear the 450m² Housing SEPP threshold.
On those, a guest studio or multigenerational space works. The survey and title check come first.
Premium where it works
Heritage Conservation Areas cover most streets, so a secondary dwelling almost always goes through a full DA.
The sandstone ground with substantial harbour fall means engineered foundations and often rock work, scoped off a real geotech.
Granny flat builder in Double Bay — key facts
- Suburb
- Double Bay, NSW 2028
- Council / LGA
- Woollahra Municipal Council (Woollahra)
- Primary zoning
- R2 Low
- Typical lot size
- 250–1,000m²
- Soil class
- M
- Median house price
- $4.5M–$15M
- Home era
- 1900s–1940s + apartments
- 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 Double Bay 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. Assessment is the most important hour you'll spend on the project. Get the position, orientation, and access right and the build runs clean. Get them wrong and you're chasing certifier RFIs for months. Buildana checks every constraint before recommending a position. We design your granny flat to maximise the 60m² allowance within Woollahra Municipal Council's setback and POS requirements. Floor plan, elevations, and 3D render provided. Studio, 1-bed, or 2-bed configurations available.
⏱The Double Bay construction phase. Fixed price, programmed, supervised. CDC pathway exists specifically for compliant granny flats — use it. No neighbour notification, no Woollahra Municipal Council planner queue, no committee politics. Certifier checks the design against the code; if it complies, it approves. 10–15 business days, every time. Fixed-price build: slab (Class M engineered), frame, roof, fit-out, connections. 10–16 weeks depending on size. Minimal disruption to your existing home.
⏱The job isn't done when the site's clean; it's done when you have keys, certificates and warranties. Walk through your finished granny flat, collect keys. Occupation Certificate, 6-year structural warranty, and maintenance guide provided. List for rent immediately — typical demand in Double Bay fills vacancies fast.
⏱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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