What Is an As Constructed Survey? Everything You Need to Know

When a construction project wraps up, the real work of compliance, documentation, and certification begins. One of the most critical components of this final stage is the As Constructed Survey — a detailed survey that verifies that everything built aligns with approved plans.

Whether you're a builder, developer, or project manager, understanding how As Constructed Surveys work is vital to avoid delays, fines, or rework.

In this article, we break down what these surveys involve, why they’re essential for council approvals and legal compliance, and how local professionals like Perth Surveying ensure your project ends as accurately as it began.

‍

Why As Constructed Surveys Are Essential for Compliance and Project Sign-Off

An As Constructed Survey (also called a "As Built Survey") is conducted after construction is complete. Its purpose is to capture the exact dimensions, locations, and elevations of all constructed features — including buildings, retaining walls, drainage systems, roads, kerbing, and underground services.

✅ Why is this important?

• Confirms that construction matches the design drawings
  
  
• Supports compliance with local council and government regulations
  
  
• Is often required for final inspections and occupancy certificates
  
  
• Reduces liability for both contractors and clients
  
  
• Essential for infrastructure handover to local authorities
  
  

Without a verified As Constructed Survey, your project could face delays in certification — or worse, costly modifications if elements fall outside approval tolerances.

‍

What’s Included in an As Constructed Survey Report?

A comprehensive As Constructed Survey doesn’t just take a few points — it maps and verifies the entire site. Perth Surveying uses advanced survey-grade equipment, 3D modelling, and digital data capture to produce clear, engineer-ready reports that meet all regulatory standards.

Common inclusions in an As Constructed Survey:

• Lot boundaries and property lines
  
  
• Structural elements: buildings, slabs, retaining walls, paving
  
  
• Levels and elevations (finished floor levels, site grading)
  
  
• Stormwater systems and drainage points
  
  
• Roadworks, kerbs, footpaths, crossovers
  
  
• Utilities (where exposed or known), such as water, gas, electrical pits
  
  
• Landscaping elements like fences or garden walls (if required)
  
  

These surveys are delivered in DWG/PDF format, ready for submission to councils, engineers, or legal representatives.

‍

As Constructed Surveys in Perth: How Local Surveyors Ensure Accuracy

If you're building in Western Australia, working with a licensed local land surveyor is crucial. Councils, such as the City of Perth, Joondalup, Stirling, and Canning, all require specific formatting, accuracy, and submission protocols.

At Perth Surveying, we’ve supported a wide range of residential and commercial projects with detailed As Constructed Surveys across:

• Urban infill developments
  
  
• Greenfield subdivisions
  
  
• Apartment complexes
  
  
• Civil infrastructure upgrades
  
  
• Mining and regional accommodation facilities
  
  

We understand the standards required by both planning authorities and construction teams — and we tailor our process to suit both.

What our clients say:

“Great service, went above and beyond to provide a particularly detailed feature survey. Nice personnel.”
— Mitchell W., Residential Developer

With responsive turnaround times, digital reporting, and council-ready submissions, we help clients avoid red tape and finalise projects smoothly.

‍

Key Takeaways

• As Constructed Surveys are required at the end of most building or infrastructure projects
  
  
• They verify all constructed works match approved design plans
  
  
• They're essential for compliance, final inspections, and asset handover
  
  
• Perth Surveying delivers detailed, council-compliant reports with fast turnaround
  
  
• Local expertise ensures smoother project closeouts and long-term risk reduction
  
  

‍

FAQ – As Constructed Surveys

Do I need an As Constructed Survey for my home renovation or extension?

Yes, especially if the project affects drainage, property lines, or structural footprint. Councils may require it before issuing a Certificate of Occupancy.

How is an As Constructed Survey different from a setout survey?

A setout survey is done before and during construction to position elements on-site. An As Constructed Survey is done after construction to verify what was actually built.

How long does an As Constructed Survey take?

This depends on the size and complexity of the site, but for most standard residential lots, surveys can be completed within a few days, with reports delivered within 5–7 business days.

Do councils accept digital reports?

Yes. Perth Surveying provides digital files (.DWG and .PDF) formatted to council and engineering standards.

‍

Final Thoughts: Build It. Survey It. Sign It Off — The Right Way.

From residential subdivisions to complex infrastructure builds, an As Constructed Survey is the final step that ensures everything built is legally compliant, safely constructed, and ready for handover.

At Perth Surveying, we make that final step smooth, accurate, and stress-free.

‍