HARPER LATTERARCHITECTS020 7183 0590

A clearer starting point

Understand your property's potential

A combined site and cost report brings together your property's planning context, relevant history and an indicative construction cost guide where the information supports one. It is an initial review, not a planning decision or a contractor quotation.

What happens next

01

Tell us about your property

Start with the address and your idea below. Add cost details only if you know them.

02

Review the context

Review site records and cost evidence separately, with scope, assumptions and missing details made clear.

03

HLA checks the report

HLA reviews the combined report before any report or advice is issued.

A submission does not appoint a consultant or authorize any paid work. No delivery time, construction price or planning outcome is promised. .

Start with the place.
Then shape the possibilities.

A combined site and cost report can help you understand:

  • The council, planning history and published designations.
  • Relevant policies, guides and matters needing further checks.
  • Application documents and specialist advice that may be needed.
  • An indicative cost range where the scope and evidence support it, with assumptions and exclusions kept clear.
HLA contemporary extension in Wimbledon, with garden-facing glazing

HLA project: contemporary extension in Wimbledon. Illustrative design reference, not a prediction for your property.

A report is an initial review, not planning permission, a measured survey, a contractor quotation or confirmation that a proposal can be built. Coverage depends on the available records. Any gaps should be clear.

Your enquiry
Add details for a cost guide Optional

Use estimates if that is all you have. Leave areas blank if unknown; they will need checking before a cost range can be useful.

New floor area means the total new internal area across all proposed storeys, not just the footprint. Refurbished area is separate from existing area; we will not infer it.

Unknown scope will be flagged, not filled with a guessed rate. An indicative construction cost range uses researched published guide rates, not a fixed site calculator. It is not a quotation or a commitment to paid work.

You can enquire without floor areas or a specification. If there is not enough information for a useful cost range, that section will say what is still needed.

Your enquiry is sent through Web3Forms to HLA's research assistant for preparation and HLA review. The service can store submissions for up to 3 years. There is no automatic report or visitor reply. See the privacy notice. Do not include sensitive information or private documents.