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Structural & Civil Engineers in Perth

Planning a renovation, extension, new home or development in Perth? QED Engineers works as both a residential and commercial structural engineer across the Perth metropolitan area and the South West — from single-storey extensions and retaining walls to unit developments and industrial buildings. Our team delivers clear, buildable, compliant designs and moves fast, with a fee proposal typically back to you within 24 hours. We work with homeowners, architects, builders and developers to get projects through permit approval and built without surprises.

Engineering for Perth's ground conditions

Perth's ground conditions change sharply from the coast to the hills, and good footings start with understanding which profile you are on. Across the Swan Coastal Plain you will find Bassendean, Spearwood and Quindalup sands — generally stable and often classifying as Class A or S — alongside Guildford Formation clays and, as you move east toward the Darling Scarp and the foothills, reactive clays that shrink and swell with moisture and commonly classify Class M to H. Getting the site classification right (to AS 2870 — Class A, S, M, H1/H2, E or P) is what protects your slab from cracking and your budget from over-engineering. Perth projects also regularly involve shallow limestone, sandy excavations that need careful retaining and battering, high termite risk requiring management to AS 3660, coastal exposure and durability near the ocean, and bushfire-prone land (BAL) on the urban fringe. We design with these local realities in mind so your documentation clears your permit authority the first time.

Building engineer registration in Western Australia

Western Australia is phasing in mandatory registration for building engineers under the Building Act 2011 and the Building Services (Registration) Regulations 2011, administered by the Building Services Board through DEMIRS. Registration opened for structural and fire safety engineers from 1 July 2024 and for civil and mechanical building engineers from 1 July 2025, and becomes mandatory on 1 July 2027 for prescribed areas of building engineering work. An accepted pathway for assessment is listing on the National Engineers Register (NER). If your WA project is heading toward a building permit, talk to us early about who will carry out and sign off the engineering.

Our credentials:

  • Listed on the National Engineers Register (NER)
  • RPEQ via the Board of Professional Engineers Queensland (for QLD projects)
  • NSW Design & Building Practitioner (registered, for NSW Class 2 projects)

Areas we serve across Perth & Western Australia

We support projects across the Perth metropolitan area, including the CBD, Fremantle, Cockburn, Melville, Canning, Victoria Park, Bayswater, Stirling, Joondalup, Wanneroo, Swan Valley, Armadale, Gosnells, Rockingham and Mandurah — plus regional Western Australia including Bunbury, Busselton and the South West on suitable projects.

Who we work with

  • Homeowners — clear advice for renovations, extensions and additions, in plain English.
  • Architects & building designers — collaborative structural input that respects the design intent.
  • Builders — responsive documentation and on-time turnaround to keep sites moving.
  • Developers — multi-residential and commercial expertise with compliant, buildable designs.

How it works

Compliant structural and civil design, ready for your permit authority and building surveyor.

Frequently asked questions

Yes. Removing or altering a load-bearing wall changes how loads travel through your home, so a structural engineer must design a suitable beam and support to carry the load safely. We provide the design and documentation your builder and (where required) your council or certifier will need.
It depends on the scope — a single beam design for a wall removal is very different from a full two-storey home or a multi-residential development. Simple residential jobs are usually a fixed fee, while larger projects are quoted on scope. Send us your plans and we'll return an itemised fee proposal, typically within 24 hours, so there are no surprises.
WA is phasing in a building engineer registration scheme under the Building Act 2011. Registration opened for structural engineers from 1 July 2024 and for civil engineers from 1 July 2025, and becomes mandatory on 1 July 2027 for prescribed building engineering work. Our engineers are listed on the National Engineers Register, which is an accepted assessment pathway under the scheme.
A site classification (to AS 2870) assesses your soil's reactivity — how much it moves with moisture — and drives your footing design. Perth sites range from stable coastal sands, often Class A, to reactive clays through the foothills and Guildford Formation that can classify Class M or H. Classification is essential to design footings that will not crack or over-spend. We can arrange or work from your geotechnical or soil report.
Turnaround depends on complexity and current workload. Straightforward residential documentation is usually 5–10 business days larger or multi-residential projects take longer. We'll confirm a realistic timeframe with your fee proposal.
Yes. Sloping blocks are common through the Perth foothills and along the Darling Scarp, and sandy or limestone profiles bring their own retaining challenges. We regularly design retaining walls, drainage and footing solutions tailored to the slope, soil and groundwater conditions of your specific site.

Ready to start your Perth project?

Send us your plans for a fast, no-obligation fee proposal from an experienced structural and civil engineering team.
QED Engineers civil and structural engineers logo

Civil and Structural Engineering solutions across residential, commercial and industrial sectors in New South Wales, Queensland, Western Australia & Tasmania.

Service areas: NSW, QLD, WA & Tasmania
Monday to Friday
8:00 am – 5:30 pm AEST
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