Land & Engineering
As-Built & Completion Surveys
What was actually built, against what was designed. The final measured record that closes a job out, supports handover, and proves compliance with a permitted drawing.
Typical accuracy · ±15mm on as-built positions of constructed features, tied to ±10mm control.
When you need it
- →Completion needs demonstrating against a planning condition.
- →Handover documentation requires a final measured record.
- →You need to know whether the built position matches the design.
- →A defect claim needs an independent record of the finished work.
What you get
- As-built drawings with design and actual overlaid
- Dimensional deviation schedule
- Final control and as-built coordinates
- Point cloud of the completed works
- Statement of compliance with the stated requirements
How it runs
- 01
Obtain the approved drawings and the site control used during construction.
- 02
Survey the completed works before demobilisation.
- 03
Compare to design and quantify every deviation.
- 04
Issue the as-built record for handover and compliance.
- Horizontal control
- ±10mm typical
- Vertical control
- ±8mm typical
- Datum
- OSGB36 · EPSG:27700
- Area covered
- Norfolk base · 6 regions
Questions we get asked
Is an as-built survey the same as a completion certificate?
No. It is the measured evidence behind one. A building control body or approved inspector still issues the certificate; we provide the survey that supports it.
Often needed alongside
Where we cover
Norfolk based, working nationwide. Site-based surveying, so distance is rarely the constraint.
Most requested in Lincolnshire & the Midlands.
Every town, district and borough we cover is listed in full on each region page. See the full service area.
All 18 other services
Start here
Send the address and what it is for.
You will get a straight answer on whether this survey is the right one, and what it should cost. If it is not, we will say so.
info@prospaplans.com · Norfolk, Kent, London, East Anglia and the Midlands