£500–£3,000 for small structural work, £15,000–£80,000+ for extensions and conversions
This is the UK guide range. Final quotes in Coventry vary based on demand, access, parking/logistics, property type, and service scope.
Typical timeline: 2–4 weeks for small projects, 3–6 months for extensions and conversions
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Coventry's post-war rebuilding created a distinctive housing stock alongside surviving older properties. Many homeowners are now modernising mid-century homes with extensions, rewiring, and energy efficiency improvements.
Better scope detail means fewer vague quotes and faster shortlist decisions.
Check for a proven track record with similar-scale projects in your area
Ask for references and visit completed projects where possible
Confirm they carry public liability insurance (minimum £2 million)
Verify they understand local building regulations and planning requirements
Get a detailed written quotation with a fixed timeline and payment schedule
Many single-storey rear extensions fall under permitted development rights. However, if your property is in a conservation area, is listed, or the extension exceeds size limits, you will need planning permission. Always check with your local planning authority before starting work.
Look for verified customer reviews, proof of public liability insurance, membership of trade bodies like the FMB or NHBC, and ask to see examples of completed projects. A reliable builder will provide a detailed written quotation and a realistic timeline.
Builders handle the above-ground structure — walls, roofs, and finishes. Groundworkers prepare the site, dig foundations, install drainage, and lay services. Many extension or new build projects require both.
A typical loft conversion takes 6–10 weeks depending on the type (Velux, dormer, or mansard). The structural work takes 2–3 weeks, followed by plastering, electrics, plumbing, and finishing.
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