House Extension
in Shoreham by Sea
Compare quotes from vetted Shoreham by Sea 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 Shoreham by Sea?
Real prices from completed projects in Shoreham by Sea 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 →Shoreham by Sea 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 Shoreham by Sea and South East. Always get at least 3 written quotes before committing to any builder.
House Extension Specialists Who Know Shoreham by Sea
Shoreham-by-Sea is one of the UK's most active home renovation markets. With a diverse range of properties across the area, from period homes to modern new builds, local builders need to be versatile, skilled, and reliable.
BestBuilders vets every builder in our Shoreham-by-Sea network. We check for public liability insurance, relevant trade qualifications (CIOB, FMB, Gas Safe, NICEIC), and a minimum of five verified customer reviews before any builder can appear on our platform.
Whether you are planning a rear extension, a loft conversion, or a full kitchen renovation in Shoreham-by-Sea, we will connect you with the right specialist within 24 hours. All quotes are free and there is no obligation to proceed.
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What Shoreham by Sea Homeowners Say About Our House Extension Specialists
Larger Permitted Development extension on our 1970s detached in Shoreham-by-Sea. 36m² split between dining space and a snug, with a window seat over the new radiators. Total project £91480 across 15 weeks. Party wall agreement handled by their consultant - smooth process.
Compared four extension builders through BestBuilders for the Shoreham-by-Sea job. Selected on the depth of the spec - 28 pages versus the cheapest at 4 pages. Foreman walked the spec sheet through with us before any digger arrived. £103030 over 18 working weeks, no surprise extras. Daily 5pm site walk with the foreman, weekly progress on the spreadsheet.
Through a full freeze-thaw winter, no movement around the new openings. Builder we found via BestBuilders in Shoreham-by-Sea designed-in concealed downlights so the ceiling has no visible fittings. Total £82140. Insurance happy with the building control completion certificate.
House Extension in Shoreham by Sea — FAQs
Plan Your house extension Project in Shoreham by Sea
Whether you're researching costs, checking planning rules, or comparing approaches before you commit, our editorial team has produced these guides to help Shoreham by Sea 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 Shoreham by Sea
We also connect homeowners with vetted house extension specialists in towns surrounding Shoreham by Sea.
Planning Your House Extension in Shoreham by Sea
Before you compare quotes, it's worth understanding the full UK price picture for house extension and how Shoreham by Sea 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 Shoreham by Sea
Find out whether your house extension needs planning permission in Shoreham by Sea, 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.