A one stop solution, from design to council approval.
We design your project to the requirements of the NCC and BCA, then take it through to the council.
Soil classification, BAL assessment, engineering report, Certificate of Design Compliance (BA3) and council submission are all handled by one studio in Western Australia.
From first idea to council submission
Concept
We listen to your brief, study your site and sketch the first ideas.
Site assessment
We arrange your soil classification and BAL assessment, so the design starts from the facts.
Design to NCC and BCA
We develop the plans to meet the National Construction Code and Building Code of Australia.
Engineering report
The structure is designed and documented in an engineering report.
Certificate of Design Compliance (BA3)
We provide the certificate that shows your design complies.
Council submission
We prepare and lodge your application with the council.
Good architecture starts with the ground it stands on.
Read the site first
Soil, slope, sun and bushfire risk shape a building before the first line is drawn. We assess them early so the design is built on facts.
Say it simply
Fewer lines, fewer materials, fewer surprises. A clear plan is cheaper to build and easier to live in.
Design for the west
Strong sun, long summers and open bush. We draw for the climate we live in.
Have a site and an idea? Talk to one studio, from design to council.
Services
Everything from design to council submission, from one studio.
Design to NCC and BCA
We design your project to the requirements of the National Construction Code (NCC) and the Building Code of Australia (BCA) from the first sketch. That keeps the plans ready for approval and avoids redesign later.
Site Classification
A site classification tells the engineer and builder how much the ground moves with moisture. It sets the footing and slab design. In Australia it follows AS 2870.
| Class | Ground type | Expected surface movement |
|---|---|---|
| A | Most sand and rock sites, little or no movement | Negligible |
| S | Slightly reactive clay | 20 to 40 mm |
| M | Moderately reactive clay or silt | 40 to 60 mm |
| H1 | Highly reactive clay | 60 to 75 mm |
| H2 | Highly reactive clay | 75 to 100 mm |
| E | Extremely reactive clay | Over 100 mm |
| P | Problem sites, such as fill, soft soils or mine subsidence | Needs engineered design |
A soil test by a geotechnical engineer confirms the class. This page is a guide only.
BAL Assessment
The Bushfire Attack Level (BAL) measures how much radiant heat, flame and ember attack a building may face. It sets the construction requirements under AS 3959.
| Level | Radiant heat | What it means |
|---|---|---|
| BAL-LOW | Minimal risk | No special construction requirements |
| BAL-12.5 | Up to 12.5 kW/m² | Ember attack |
| BAL-19 | 12.5 to 19 kW/m² | Ember attack and some radiant heat |
| BAL-29 | 19 to 29 kW/m² | Higher radiant heat and ember attack |
| BAL-40 | 29 to 40 kW/m² | Very high heat, embers and some flame contact |
| BAL-FZ | Over 40 kW/m² | Direct flame contact, the most severe level |
Your BAL depends on vegetation, slope and distance from the bush. A bushfire assessment confirms it.
Engineering Report
Structural design and an engineering report for your project, such as footings, slab, framing and retaining walls where needed. It forms part of your approval documents.
Certificate of Design Compliance (BA3)
The Certificate of Design Compliance, known as BA3, shows that your design complies with the building requirements. It is submitted with your building permit application.
Council Submission
We prepare your documents, lodge your application with the council and respond to questions from the assessor, so you do not have to chase the process yourself.
Not sure which service you need? Tell us about your site.
About Us
CDD Studio, short for Concept Design Develop, is an architecture and design practice in Western Australia.
We are a one stop solution from design to council approval. We keep our drawings clear and our process simple. Tell us about your site and what you want to build, and we will take it from there.
Find us
1/4 Mountain ViewKelmscott
Western Australia
Start your project
Tell us about your site and what you want to build. We will reach back to you.