Granny Flats · Eastern Suburbs
Granny Flat Builders Eastern Suburbs.
Secondary Dwellings, Built Properly.
Secondary dwellings across the Eastern Suburbs, built to the same standard as the main house rather than as a shed with a kitchen.
About Ossher Design and Build
Secondary dwelling builders in the Eastern Suburbs.
A secondary dwelling, commonly called a granny flat, is one of the few ways to add genuine value and flexibility to an Eastern Suburbs block without touching the main house.
Under the NSW Affordable Rental Housing SEPP, a compliant secondary dwelling of up to 60 square metres can often be approved as a Complying Development Certificate, which is far faster than a DA.
The requirements are specific: a minimum 450 square metre lot, setback and site coverage compliance, and separate private open space. Many Eastern Suburbs blocks qualify; plenty don't, and we'll tell you which yours is early.
We build these to house standard, with proper insulation, acoustic separation, metered services and a finish that matches the main dwelling, because in this market that's what they need to be.
Fully licensed · Fully insured · Free consultation
Book a free consultation →Recent Work
Recent projects in the Eastern Suburbs.
Services
Secondary dwelling services.
Detached granny flats, garage conversions, attached secondary dwellings and studio outbuildings.
Custom Home Builders
Bespoke new builds tailored to your block, lifestyle, and brief.
Home Renovations
Considered renovations that add liveability and long-term value.
Home Extensions
Additions that integrate seamlessly with your existing home.
Second Storey Additions
Add space and light without leaving the suburb you love.
Knockdown & Rebuild
Start fresh on the block you already own and love.
Duplex Builders
Maximise the potential of your block with a smart duplex.
Kitchen Renovations
Modern, practical kitchens with custom joinery and finish.
Bathroom Renovations
Hardwearing bathrooms built for the coastal lifestyle.
Get in Touch
Thinking about a granny flat?
Give us your address and block size and we'll tell you honestly whether a secondary dwelling is viable before you spend on plans.
the Eastern Suburbs and the Eastern Suburbs, NSW.
Ossher Design and Build · Fully licensed · Fully insured
Send an Enquiry
Tell us about your project
Local Knowledge
Granny flat feasibility in the Eastern Suburbs.
Eastern Suburbs blocks are smaller than the state average, so feasibility hinges on a few numbers.
Lot Size & Coverage
A minimum 450 square metre lot and compliant site coverage are the first tests. We check them against your title before anything else.
CDC vs DA
A compliant scheme via CDC can be certified in weeks. Non-compliant designs need a DA and take months, so it's worth designing to the code where possible.
Access & Services
Getting materials to a rear yard on a narrow Eastern Suburbs block, and running separately metered water, power and sewer, is where the real cost sits.
Testimonials
What our clients say.
"Excellent standard of work, consistently delivered beyond expectations. Adam's ideas transformed our water-damaged living area into a bigger space with improved views, with quality finishes delivered on time and on budget."
"I've worked with Adam for over five years. His attention to detail is exceptional, communication is clear and reliable, and he consistently delivers high-quality work."
"Working with Adam was a genuinely great experience. The process was organised and far less stressful than expected, and the final quality and attention to detail were outstanding."
Why Ossher Design and Build
Why choose Ossher for a secondary dwelling.
- Experienced local builders who know the Eastern Suburbs's blocks, council, and challenges
- Fully licensed and insured
- End-to-end project management
- Eastern Suburbs build expertise with materials selected for the local environment
- Heritage experience across Federation and Edwardian homes
- Clear communication at every stage of your build
Service Areas
Areas we service across the Eastern Suburbs.
We build secondary dwellings across the Eastern Suburbs, subject to lot size and council requirements.
Not sure if we cover your area? Get in touch →
FAQs
Frequently asked questions.
Expect $180,000 to $320,000 for a quality 50 to 60 square metre secondary dwelling here, higher than outer Sydney because of access constraints, excavation and finish expectations.
You need either a CDC from a private certifier or a DA from council. A compliant design under the Affordable Rental Housing SEPP usually takes the CDC pathway.
Yes. Secondary dwellings approved under the SEPP can be rented independently of the main house, which is the main reason most clients build them.
No. Secondary dwellings cannot be subdivided from the primary dwelling. If separate title is your goal, a duplex or dual occupancy is the right structure instead.
Yes. We hold a current NSW contractor licence and carry full public liability and home warranty insurance on every project.
Founder Adam Ossher runs every project personally, from feasibility through to handover. You deal with the person accountable for the build, not a rotating site manager.
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