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Our Package

Granny Flats

Do you need a custom design for your new home, granny ﬂat, duplex or dual occupancy project? Here we can work with you closely to ﬁnd our your brief and requirements. We will then prepare a custom design concept plan so that you can get quotes from your builder.

Product Description

Would you love a nice little home studio, a rumpus space for the teenagers or a self-contained accommodation for family, tenants or an air BnB?

Building a Granny Flat could be a perfect fit for you, and it’s never been easier or more affordable in NSW.

Also referred to as a ‘secondary dwelling’, a granny flat can be certified as a complying development without the need for a development application, thanks to the State Environmental Planning Policy (Affordable Rental Housing) passed in 2009. According to NSW Planning & Environment , a granny flat may be approved within an amazing 20 days if it meets the design provisions.

In NSW, site requirements include a lot size of at least 450 sq/m, within the maximum footprint of 60sq/m for the granny flat. Boundary setbacks, environment, heritage and strata restrictions still apply, so it’s a good idea to bring building design experts on board to make sure your certification goes through smoothly.

Duplex Building Design’s team not only design and draft modern and functional granny flats tailored to our clients sites and needs, but produce the plan drawings required and assist with the council approval process to make sure it’s as quick and stress free as possible.

Stage 1

Stage 2

Stage 3

Stage 4

SITE PLAN FULLY DETAILED
SITE ANALYSIS PLAN
DETAILED FLOOR PLAN (proposed and existing)
DEMOLITION PLAN (if required)
ELEVATIONS DETAILED AND NOTED
SECTION AND DETAILS
WINDOW AND DOOR SHCEDULES
SHADOWS DIAGRAM (for 2 storey development)
STROM WATER DRAINAGE CONCEPT PLAN
SITE WASTE MANAGEMENT PLAN
BASIX CERTIFICATE
STATEMENT OF ENVIRONMENTAL EFFECTS
SITEMENT AND EROSION CONTROL PLAN
SLAB SETOUT OR FLOOR FRAMING PLAN
ROOFING PLAN
GENERAL SPECIFICATION
CONSULTANT LIAISON ALLOWANCE
LODGE AND MANAGE DA/CDC PLOEESS WITH COUNCIL OR PRIVATE CERTIFIER
DEALING WITH INFORMATION REQUESTS FROM COUNCIL/CERTIFIER

TESTIMONIALS

WHAT OUR CLIENTS SAY

We found Nathan and the team at Duplex Building Design great in bringing all our ideas into the design of our home in a timely and professional manner. We found them to be ﬂexible in their approach and informative in relation to council building requirements as well as recommending products that suited our house plans and design. On the success of our house design we also used Duplex to design our small townhouse development and they were fantastic in all facets of the planning process

We used Nathan and his team at Duplex Building Design for our dual occupancy design at Oak Flats, we were very pleased with how professional Nathan was, he listened to our ideas and was able to gain approval in council with minimal fuss. The whole process was professional and smooth and will be coming back for our next investment project.

We were blown away by Nathan and the way he helped us with our renovation design and granny ﬂat on our property at Cronulla. We had a bad experience with the previous designer so came into this process nervous, Nathan was professional and easy to communicate with, he helped us through each stage of the process from the initial design through to the council approvals. Our project is approved and we are looking forward to starting. We can’t recommend Nathan and his staﬀ more highly enough.

This was the ﬁrst time we had plans drawn up and was not sure what to expect. Nathan was prompt and listened to what we wanted with our unit development and provided exactly what we asked for as well as two other options to show what could be achieved. We needed one small revision which was completed within 4 hours and we are extremely happy with the service. We will deﬁantly use Duplex Building Design again in the future.