Building Guides
Clear project information helps homeowners make better decisions before building work begins. These guides explain common parts of planning, quotations, contracts and construction in practical language for people considering an extension, refurbishment or structural alteration in Cambridge and Cambridgeshire.
The articles are general information rather than project-specific legal, planning or engineering advice. Requirements vary with the property, drawings, site conditions, approvals and contract.
Choose a planning, Building Regulations or quotation guide
Select the topic you need, then click the guide title or the “Read guide” link to open the full guide.
House Extension Costs in Cambridge and Cambridgeshire
A practical 2026 budgeting guide with current per-square-metre benchmarks, worked 20m² and 30m² examples, VAT, planning fees, common exclusions and the local factors that can change a quotation.
Read the House Extension Costs guide →
Planning Permission for House Extensions in Cambridge
A practical guide to when a Cambridge extension needs permission, local restrictions, the householder application process, drawings, conditions and approvals before building.
Read the Cambridge Extension Planning guide →
Permitted Development Guide and Process
A practical guide to householder permitted development rights, extension and loft limits, local restrictions, prior approval, lawful development certificates and the checks needed before building.
Read the Permitted Development guide →
Building Regulations for House Extensions in Cambridge
A practical guide to approval routes, design information, 3C Building Control inspections and completion certificates for Cambridge house extensions.
Read the Cambridge Building Regulations guide →
What should a builder’s quotation include?
A detailed checklist covering scope, exclusions, VAT, allowances, programme, stage payments, variations, insurance and written contract terms.
Read the Builder’s Quotation guide →
Use the guides with real project evidence
A useful guide should connect general advice with work that can be inspected. See our building project portfolio, including the Clay Street extension and refurbishment in Histon and the Herons Close extension in Cambridge.
You can also explore our services for house extensions, property refurbishment, brickwork and blockwork and structural alterations.
Discuss a proposed project
If you have a postcode, drawings, planning status, intended start period and an approximate budget, Start Your Project Enquiry. A site visit can then clarify access, the existing property and the proposed scope before a detailed quotation is prepared.
Guides are reviewed periodically. Always use the current requirements and obtain appropriate professional advice for your property and project.