House Extension
in Horsforth
Compare quotes from vetted Horsforth extension builders for single-storey, double-storey and rear extensions. Transparent pricing from £15,000. Free, no-obligation quotes — results in 24 hours.
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How Much Do House Extension Cost in Horsforth?
Real prices from completed projects in Horsforth 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 →Horsforth pricing note: Yorkshire and Humber offers some of the most competitive building prices in England, typically 5–10% below the national average. Good contractor availability across Leeds, Sheffield, Hull and surrounding areas. Prices shown are indicative ranges for Horsforth and Yorkshire. Always get at least 3 written quotes before committing to any builder.
House Extension Specialists Who Know Horsforth
Home renovation activity in Horsforth 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 Horsforth 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 Horsforth 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 Horsforth Homeowners Say About Our House Extension Specialists
Two-storey side extension on our 1970s detached in Horsforth. Side return infill of 12m² brought the kitchen into the new space and added a utility. Job done for £120500 over 16 weeks. Permitted Development under the larger home extension scheme - no full planning application.
Compared four extension builders through BestBuilders for the Horsforth job. Picked the team that took the time to come back twice with revised drawings. Trial pit confirmed foundation depth on day two, no over-engineering. £85390 over 18 working weeks, no surprise extras. Snagging list closed within 14 days of completion handover.
Eighteen months on, the bi-folds open every weekend and have not dropped on the runners once. Builder we found via BestBuilders in Horsforth recommended an in-floor zone control - underfloor heating runs only where needed. Total £71220. Already used them again for the loft.
House Extension in Horsforth — FAQs
Plan Your house extension Project in Horsforth
Whether you're researching costs, checking planning rules, or comparing approaches before you commit, our editorial team has produced these guides to help Horsforth 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
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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 Horsforth
We also connect homeowners with vetted house extension specialists in towns surrounding Horsforth.
Planning Your House Extension in Horsforth
Before you compare quotes, it's worth understanding the full UK price picture for house extension and how Horsforth 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 Horsforth
Find out whether your house extension needs planning permission in Horsforth, 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.