The issue on this job
The rear plot had a narrow side return and no reliable service drawings, so there was a real risk of opening trial holes in the wrong place. The boundary line also sat close to neighbouring runs, which made cautious planning essential.
Because the extension programme was already fixed, the client needed the utility information quickly enough to avoid pushing back the dig date.
How we handled it
We delivered a utility survey in Chiswick using detection and trace work along the proposed dig corridor, then tied the findings into the site plan so the contractor could sequence excavation safely.
The survey highlighted where the line could proceed as planned and where offsets or hand-dig controls were needed close to the boundary.
What the result was
Output
CAD / Planning-ready drawings
Delivery
Kept the programme moving
Programme
a short site visit before the groundworks start
The contractor went into the excavation phase with a defined dig strategy instead of guessing from partial records. That reduced strike risk and helped the client keep the extension programme intact.
If you are dealing with unknown buried services before drainage and foundation excavation on a rear garden extension site, the next step is a clear scope and quote.
Check survey availabilityWhen this kind of work is needed
This type of survey is normally worth doing before any excavation where service records are weak, rear access is tight, or the dig line sits close to boundaries and existing drainage.
Related services in this area
If the design also needs finished levels and hard detail, combine utility survey in Chiswick with topographical survey in Chiswick.
Topographical Survey in Chiswick, Measured Building Survey in Chiswick, Utility Mapping Survey in Chiswick.
What Survey Do I Need for Planning Permission?, Do I Need a Survey Before Building an Extension?.
If you need utility survey in Chiswick, we can review the job, confirm the constraints, and price the right route.
Check survey availability