Shanklin ยท House Extension

House Extension
in Shanklin

Compare quotes from vetted Shanklin extension builders for single-storey, double-storey and rear extensions. Transparent pricing from ยฃ17,500. Free, no-obligation quotes โ€” results in 24 hours.

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Local Shanklin Experts
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House Extension Specialists in Shanklin
4.9
Average Star Rating
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Projects Completed in Shanklin
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How Much Do House Extension Cost in Shanklin?

Real prices from completed projects in Shanklin and the surrounding area. Costs vary by size, specification and access โ€” use these as a starting guide, then get 3 free quotes for your specific project.

Full cost guide โ†’
Single-storey extension
Rear or Side-Return Extension
£ 27,000 โ€“ £55,000

The most popular choice for UK terraces and semis. Adds a kitchen-diner or extra living space at ground level. Typically 3โ€“5m deep, completed in 10โ€“14 weeks.

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Double-storey extension
Full Double-Storey Rear Extension
£ 55,000 โ€“ £99,000

Maximum space gain in a single build โ€” adds a ground-floor room and a bedroom above. Strong ROI in most UK property markets. Requires full planning permission.

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Side Extension
Side-Return or Infill Extension
£ 17,500 โ€“ £41,500

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.

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Your Project
Get an Accurate Quote

Costs depend on size, spec and access. The best way to know your exact price is to compare 3 quotes from vetted local specialists.

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Shanklin pricing note: Southern England (Hampshire, Dorset, West Sussex) sits around 10โ€“15% above the national average. Coastal locations and areas with restricted site access can attract additional charges from contractors. Prices shown are indicative ranges for Shanklin and Southern. Always get at least 3 written quotes before committing to any builder.

House Extension Specialists Who Know Shanklin

Shanklin 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 Shanklin 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 Shanklin, 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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How It Works

1
Tell us your project
Describe your house extension project and postcode. Takes 60 seconds.
2
We match you instantly
We send your brief to up to 3 vetted house extension specialists in Shanklin.
3
Compare and choose
Review quotes, profiles and reviews. No obligation to proceed.

Every Builder We Recommend Is:

โœ“ Minimum ยฃ2m public liability insurance โ€” verified before listing
โœ“ Holds relevant trade qualifications (FMB, CIOB, FMB, CIOB)
โœ“ Has a minimum of 5 verified customer reviews before joining
โœ“ Actively monitored โ€” removed for sustained negative feedback

What Shanklin Homeowners Say About Our House Extension Specialists

โ˜…โ˜…โ˜…โ˜…โ˜… 4.9 / 5
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Conservation-area sympathetic extension on our detached new-build in Shanklin. Cantilevered glass roof at the threshold with no internal columns - clean look. ยฃ117080 fully turnkey, 18 weeks. CIAT-registered architect on retainer for the planning drawings.

Otis L.
Shanklin
House Extension
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Compared four extension builders through BestBuilders for the Shanklin job. Final pick had a structural engineer on staff, not subcontracted. WhatsApp group with all the trades, photos shared daily, choices approved on the fly. Total ยฃ78300 fully turnkey. Building control sign-off straightforward, no comeback.

Asha R.
Shanklin
House Extension
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Past a year and the extension is the most-used part of the whole house. Builder we found via BestBuilders in Shanklin oversized the steel beam slightly so we could remove a future internal wall easily. Total ยฃ59880. EPC went up two bands - the new envelope spec made a real difference.

Theo J.
Shanklin
House Extension

House Extension in Shanklin โ€” FAQs

Single-storey extensions in Shanklin typically run ยฃ2,000 to ยฃ3,000 per square metre, so a 20 square metre rear extension usually costs ยฃ40,000 to ยฃ60,000. Two-storey extensions cost more in total but less per square metre because the roof and foundations are shared.
Many single-storey rear extensions in Shanklin fall under permitted development, up to 3 metres for an attached house or 4 metres for a detached one, or up to 6 and 8 metres under the larger home extension prior approval scheme. Conservation areas, listed buildings and most side extensions need full planning permission, so check with your builder first.
A single-storey extension usually takes 10 to 16 weeks on site, and a two-storey extension 16 to 24 weeks, weather and access permitting. Allow time for design, planning and building regulations approval before work begins in Shanklin.
If your extension is built up to or astride a shared boundary, or involves digging near the foundations of a neighbouring property, the Party Wall Act applies and you must serve notice. Most Shanklin builders flag this early so a party wall surveyor can be arranged in good time.
Yes, almost all extensions need building regulations approval covering structure, insulation, drainage and fire safety, even when planning permission is not required. Your Shanklin builder works to these standards and arranges building control inspections at each key stage.

Plan Your house extension Project in Shanklin

Whether you're researching costs, checking planning rules, or comparing approaches before you commit, our editorial team has produced these guides to help Shanklin 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.

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All House Extension Specialists

Browse our nationwide network of vetted house extension contractors covering all 519 UK towns.

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All Cost Guides

Compare prices across extensions, lofts, kitchens, bathrooms, roofing, driveways and solar projects.

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Planning your house extension project? Read these guides:

House Extension Near Shanklin

We also connect homeowners with vetted house extension specialists in towns surrounding Shanklin.

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Planning Your House Extension in Shanklin

Before you compare quotes, it's worth understanding the full UK price picture for house extension and how Shanklin 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 โ€” drawn from real project data across 519 UK towns.

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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 โ†’

Planning Permission for House Extension in Shanklin

Find out whether your house extension needs planning permission in Shanklin, 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 โ†’

More homeowner resources: all UK building guides, cost guides, planning permission, comparisons, how-to guides and industry insights.

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