Watson
West Midlands
House Extension Cost Calculator UK 2026 | Professional Build Estimator
Calculate your house extension costs with our high-precision 2026 UK build estimator. Whether you are planning a single-storey rear extension in Wolverhampton or a luxury double-storey conversion in London, our tool utilizes live market data (ranging from £1,650 to £4,000+ per m²) to provide a detailed investment breakdown.
Why WWM Group?
WWM Group is a leading name in UK residential construction, bridging the gap between national scale and local expertise. Our 2026 Build Calculator uses live tender price indices to provide homeowners with a realistic starting point for their journey.
We specialize in "Turnkey" solutions—taking your project from initial estimate to final completion with a focus on transparency, architectural integrity, and 2026 compliance.
Beyond the Estimate: Planning Your Perfect Build
Generating your quote is just the first step. Whether you are looking for local craftsmanship or specialized commercial services, our team at Watson Builders is ready to bring your vision to life.
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Visit our Homepage to see our full portfolio of completed works across Wolverhampton and the West Midlands.
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Enhance your outdoor space by exploring our Landscaping Services, where we specialize in luxury patios, porcelain paving, and full garden redesigns.
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Ready for a bigger change? Learn more about our Home Building and New Build services to see how we manage large-scale residential projects from the ground up.
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Need more room? Check out our expert Home Extension services for detailed information on double-storey builds and kitchen-diner transformations.
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Professional Solutions: For business owners and large-scale developments, we provide a dedicated Commercial Works department focused on retail, industrial, and office renovations.
