House Extension
in Redhill
Compare quotes from vetted Redhill extension builders for single-storey, double-storey and rear extensions. Transparent pricing from £19,500. Free, no-obligation quotes — results in 24 hours.
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How Much Do House Extension Cost in Redhill?
Real prices from completed projects in Redhill and the surrounding area. Costs vary by size, specification and access — use these as a starting guide, then get 3 free quotes for your specific project.
The most popular choice for UK terraces and semis. Adds a kitchen-diner or extra living space at ground level. Typically 3–5m deep, completed in 10–14 weeks.
Get quotes for this →Maximum space gain in a single build — adds a ground-floor room and a bedroom above. Strong ROI in most UK property markets. Requires full planning permission.
Get quotes for this →Ideal for terraced homes with a narrow side alley. Transforms a cramped kitchen into a full-width open-plan space. Often combined with a rear extension.
Get quotes for this →Costs depend on size, spec and access. The best way to know your exact price is to compare 3 quotes from vetted local specialists.
Get free quotes →Redhill pricing note: South East England prices run 15–25% above the national average, particularly in Surrey, Kent and areas within commuter distance of London. Strong demand and limited contractor availability in peak season push costs higher. Prices shown are indicative ranges for Redhill and South East. Always get at least 3 written quotes before committing to any builder.
House Extension Specialists Who Know Redhill
Home renovation activity in Redhill continues to grow year on year. The area's varied housing stock, from older stone-built properties to new-build estates, means there is always strong demand for skilled, experienced local builders.
Before any builder appears on our Redhill platform, we carry out a full vetting check covering public liability insurance, trade qualifications, company registration and verified customer feedback. Only builders who pass every stage are listed.
Our Redhill builder network covers extensions, loft conversions, kitchens, bathrooms, roofing, driveways and more. Get up to 3 free, no-obligation quotes within 24 hours and choose the builder that best fits your project and budget.
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What Redhill Homeowners Say About Our House Extension Specialists
Single-storey rear extension on our 1970s detached in Redhill. 24m² rear with structural opening through to the existing kitchen and a steel beam above. Total project £87080 across 15 weeks. FMB-credentialed builder, structural calcs done in-house.
Compared four extension builders through BestBuilders for the Redhill job. Quotes ranged from £42k to £71k - went with the £58k mid-tier on detail. Foreman walked the spec sheet through with us before any digger arrived. £74340 all-in, including all internal finishes. Moved out for two weeks during the demolition and steel install, the rest was bearable.
Two years post-completion the extension still feels like part of the original house. Builder we found via BestBuilders in Redhill designed-in concealed downlights so the ceiling has no visible fittings. Total £77940. Decided to stay rather than move - the extension solved the space problem entirely.
House Extension in Redhill — FAQs
Plan Your house extension Project in Redhill
Whether you're researching costs, checking planning rules, or comparing approaches before you commit, our editorial team has produced these guides to help Redhill homeowners make informed decisions about their house extension project.
House Extension Cost Guide
Detailed UK price ranges, regional adjustments and worked examples for house extension projects.
Read House Extension Cost Guide →All House Extension Specialists
Browse our nationwide network of vetted house extension contractors covering all 519 UK towns.
Browse House Extension Specialists →All Cost Guides
Compare prices across extensions, lofts, kitchens, bathrooms, roofing, driveways and solar projects.
View All Cost Guides →Planning your house extension project? Read these guides:
House Extension Near Redhill
We also connect homeowners with vetted house extension specialists in towns surrounding Redhill.
Planning Your House Extension in Redhill
Before you compare quotes, it's worth understanding the full UK price picture for house extension and how Redhill sits within it. The guides below cover average costs, what affects your quote, and how to choose a builder you can trust.
UK House Extension Cost Guide
Full price ranges, worked examples and the factors that move your quote — drawn from real project data across 519 UK towns.
Read the house extension cost guide →House Extension Across the UK
Browse house extension services nationwide, see what's typical in your region, and request quotes from any UK location.
Visit the UK house extension hub →Planning Permission for House Extension in Redhill
Find out whether your house extension needs planning permission in Redhill, what Permitted Development limits apply, and how rules differ in conservation areas, Article 4 zones, and listed-building settings.
Read the house extension planning rules →More homeowner resources: all UK building guides, cost guides, planning permission, comparisons, how-to guides and industry insights.