SDA Structures

What SDA Structures does

SDA Structures Pty Ltd is a specialist structural and civil engineering design studio founded in 1999 by Andrew Simpson and headquartered in Rozelle, Sydney, Australia. The firm provides structural engineering consulting services for projects ranging from small residential extensions to complex public buildings valued up to A$100m+ (with some engagements up to A$200m), working across houses, multi-residential developments, public buildings, heritage sites, educational facilities, commercial properties, urban spaces, and art installations. Its core technology stack comprises Building Information Modelling (BIM) with Revit (adopted in 2008), Computer Aided Drafting (CAD), and advanced engineering analysis software, applied across timber, steel, concrete, glass, and composite materials with integrated sustainable design (ESD) principles.

SDA Structures operates as a sales-led, relationship-driven professional services firm, acquiring projects through direct collaboration with architects and clients. The firm's customer base is diversified across architectural practices (its primary segment, including Durbach Block Jaggers, Neeson Murcutt + Neille, and Tonkin Zulaikha Greer), government and institutional clients (Waverley Council, City of Sydney, Surf Life Saving NSW), cultural institutions (Museum of Contemporary Art, Australian Museum), and high-end residential clients. Services are billed on a project basis, with no publicly disclosed pricing. The firm differentiates through direct director involvement on all projects, award-winning multi-material expertise, and 25+ years of brand reputation, with approximately 30 staff across directors, associate directors, engineers, drafting, and operations. There is no external institutional investment, no subsidiaries, and no disclosed revenue, and the firm is in a founder succession transition as Andrew Simpson moves toward retirement.

Name

SDA Structures

Legal name

SDA Structures Pty Ltd

Website

https://sdastructures.com.au

Company type

Private

Founded year

1999

Operating status

Operating

Headcount range

11–50 employees

Short description

SDA Structures is a specialist structural and civil engineering design studio in Sydney, Australia, founded in 1999. It serves architects, government, cultural institutions, and high-end residential clients with BIM-enabled engineering design for projects ranging from small homes to A$100m+ public buildings.

Ownership category

akta.pro rank

Product category

Structural Engineering Services

NAICS

Drafting Services (541340)

SIC

Services-Engineering Services (8711)

akta.pro primary industry

Civil & Structural Engineering Consulting (BPAHAIAA)

Keywords

• Structural engineering design
• Civil engineering consulting
• Heritage building refurbishment
• BIM structural documentation
• Sustainable building design

Headquarters

HQ city

Rozelle

HQ country

Australia

HQ region

Oceania

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Structural Engineering Consulting Services: Professional services revenue generated through structural engineering design and consulting for architectural projects. Services are billed on a project basis, typically as part of construction projects ranging from small residential to large commercial developments valued up to $100m+.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

SDA Structures is a specialist structural and civil engineering design studio that delivers professional engineering consulting services for buildings ranging from small residential extensions to $100m+ public buildings. The firm collaborates with architects, government clients, and private clients to engineer complex project outcomes spanning houses, multi-residential developments, public buildings, urban spaces, heritage refurbishments, educational facilities, sustainability and timber projects, commercial buildings, and art installations. All documentation is digitally produced using BIM and CAD, with Revit capabilities since 2008.

Product overview

SDA Structures is a specialist structural and civil engineering design studio that provides professional engineering consulting services. The firm offers structural engineering design and analysis services across diverse building types including residential houses, multi-residential developments, public buildings, heritage projects, educational facilities, commercial properties, and art installations. The company collaborates with architects and clients to achieve complex structural outcomes. Services are delivered through a team of qualified engineers and utilize Building Information Modelling (BIM) and Computer Aided Drafting (CAD) documentation. As a consultancy rather than a software product company, SDA Structures does not offer discrete software products or modules—their offering consists entirely of professional engineering services.

Differentiator

Problem solved

Functional benefit

Products and services

• Structural Engineering Design Services Specialist structural engineering design and consulting services for buildings ranging from small residential extensions to $100m+ public buildings. Includes structural analysis, design, and documentation using BIM, CAD, and Revit. For architects, government clients, and private clients across all building types.

Quantifiable outcome

• 25+ years of structural engineering excellence with multi-award recognition
• +1 more outcomes

Named customers6 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Partnerships

One partnership is on record.

• Various Architectural FirmscoreStrategic or Co-development PartnerSDA Structures works in close collaboration with architectural firms on all projects. Key partners include Durbach Block Jaggers, Neeson Murcutt + Neille, Tonkin Zulaikha Greer Architects, CHROFI, Andrew Burns Architecture, and many others. These collaborations result in award-winning projects across residential, commercial, public, and heritage categories.

Scale indicators3 records

Recent moves5 records

Expansion highlights10 records

Direct peers

• BG&E: Australian multi-disciplinary engineering consultancy with a strong structural engineering practice serving buildings, infrastructure, and resources sectors. Closest mid-sized Australian peer in scope, with comparable project scale and architectural collaboration model.
• Engenium: Australian structural and civil engineering consultancy with comparable size and architectural project focus. Direct niche competitor for mid-sized architecturally complex commissions across Australia.
• Northrop Consulting Engineers: Australian engineering consultancy with a sizable structural division serving buildings, education, and heritage projects. Comparable mid-size peer with similar architect-led delivery model and project complexity profile.
• Taylor Thomson Whitting (TTW): Long-established Australian structural and civil engineering consultancy with deep heritage and architectural project portfolio. Highly comparable in terms of award-winning project pedigree and architect collaboration model.
• Henry and Hymas Consulting Engineers: Sydney-based specialist structural engineering firm with comparable size and focus on architecturally complex projects. Direct niche competitor working with leading Australian architects on residential and public buildings.
• Calibre Engineering Group: Australian engineering consultancy with structural capability serving buildings, infrastructure and resources. Comparable mid-tier competitor with overlapping architectural project work in NSW and Victoria.
• SGL Consulting Group: Australian structural and civil engineering consultancy focused on architecturally driven projects across residential, commercial and institutional sectors. Closely comparable in positioning around design-led engineering delivery.

Broad incumbents

• Arup: Global engineering and design consultancy with significant Australian structural engineering presence, including major cultural, educational, and infrastructure projects. Broader portfolio than SDA but competes for architecturally significant commissions.
• Aurecon: Large Australian-headquartered engineering consultancy with structural buildings capability. Larger scale and broader service offering, competing for institutional and architectural commissions across the same architect network.

Regional players

• SCP Consulting Engineers: UK-based structural and civil engineering consultancy with strong heritage and architecturally complex project portfolio. Comparable firm size and specialist positioning, though serving UK market primarily.

Market position

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights7 records

Customer concentration

• Xx.com/sda_structures
• LinkedInlinkedin.com/company/sda-structures
• Instagraminstagram.com/sdastructures

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about SDA Structures