House Extension
in Eastbourne
Compare quotes from vetted Eastbourne 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 Eastbourne?
Real prices from completed projects in Eastbourne 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 →Eastbourne 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 Eastbourne and South East. Always get at least 3 written quotes before committing to any builder.
House Extension Specialists Who Know Eastbourne
Eastbourne has a thriving home improvement market driven by a strong local economy and a mix of Victorian terraces, post-war housing and contemporary developments. Finding the right builder is key to any successful project.
Every builder in our Eastbourne network is thoroughly vetted before joining BestBuilders. We verify insurance cover, check trade memberships with bodies such as the FMB and CIOB, and require a minimum of five real customer reviews.
From a small bathroom refurbishment to a major double-storey extension, our vetted Eastbourne builders cover the full range of residential projects. Request your free quotes today and compare options before making any decisions.
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What Eastbourne Homeowners Say About Our House Extension Specialists
Wraparound extension on our 1950s pebbledash semi in Eastbourne. 15m² snug added with a feature gable end and exposed steel detail. Came in at £98150 with bi-folds and lantern. Trial pit done day one to confirm foundation depth was workable.
Compared four extension builders through BestBuilders for the Eastbourne job. Highest-priced quote actually had the cheapest spec - the breakdown made it obvious. CCTV drain survey on day one, no surprises with hidden services. Came in at £50760 over 14 weeks, no surprise extras. EPC went up two bands thanks to the new spec.
A year in, the underfloor heating runs the new space at zero heating cost from solar. Builder we found via BestBuilders in Eastbourne persuaded us into a wider opening to the original house - the flow is so much better. Total £82140. Stamp duty saved by extending out rather than moving up.
House Extension in Eastbourne — FAQs
Plan Your house extension Project in Eastbourne
Whether you're researching costs, checking planning rules, or comparing approaches before you commit, our editorial team has produced these guides to help Eastbourne 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 Eastbourne
We also connect homeowners with vetted house extension specialists in towns surrounding Eastbourne.
Planning Your House Extension in Eastbourne
Before you compare quotes, it's worth understanding the full UK price picture for house extension and how Eastbourne 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 Eastbourne
Find out whether your house extension needs planning permission in Eastbourne, 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.