HomeAboutServices Areas We Cover Our WorkReviewsSpecialsContact07784 144802Free Estimate - Home - /Services - /Extensions - /Horsham Horsham, RH12 and RH13 # Extensions in Horsham An extension is usually the cheaper answer to needing more space than moving house is. The value is in getting the foundations, structure and flow right so the new space feels like it was always part of the home. 14+ years experience5.0 ratedFree site surveyOn site in around 35 minutes Free site survey & estimate07784 144802 ## Extensions estimate in Horsham We reply to every enquiry within 24 hours, Monday to Sunday Or call 07784 144802Free site survey and written estimate. No obligation, no pushy follow-ups. ## Typical Horsham project cost Single storey extensions generally start around £30,000 and rise with size, glazing, structural openings and specification. ## How long it takes A single storey extension typically takes 10 to 16 weeks depending on scope. ## What extensions work in Horsham actually involves Horsham ground conditions swap between Weald Clay and sandier deposits, sometimes within the same street. We test on site rather than assuming, because the sub-base spec changes completely between the two. Horsham mixes period townhouses near the Carfax with larger detached plots on the edges of town, so the same job can mean conservation-sensitive materials in one street and generous open-plot construction in the next. We handle groundworks, drainage diversions, footings, structure and external envelope, coordinate building control inspections at each stage, and match brick, bond and mortar to the original so the join does not read as an afterthought. We work across Horsham and the surrounding villages — Broadbridge Heath, Southwater, Warnham, Rusper, Colgate, Roffey — and reach most addresses in around 35 minutes. Where consent or building control is involved we deal with Horsham District Council and tell you up front what is required. You can see the full extensions service detail or everything we cover in Horsham. ### Materials and options we install - Single and double storey rear and side extensions - Foundations, footings and structural openings - Brick and block work matched to the existing elevation - Roofing, rainwater goods and external finishes Why it lasts ## How we build extensions to last in Horsham ### Space without moving Add the kitchen, family room or bedroom you need for a fraction of the cost of relocating. ### Built to the drawings Foundations, structure and building control stages handled properly rather than improvised on site. ### Matched to the house Brick, bond, mortar colour and roofline chosen so the extension reads as original. ### One point of contact Groundworks through to external finish managed by the same team, so nothing falls between trades. Customer feedback "We needed a driveway that could cope with daily use and still look sharp from the road. The finished result is solid, tidy and completely changed the front of the house." James T. — Block Paved Driveway, HorshamSee completed projectsRead all reviews FAQs ## Extensions in Horsham — common questions ### svg]:rotate-180 py-3 text-left text-sm font-semibold text-card-foreground hover:no-underline md:py-4 md:text-base" data-radix-collection-item="">How much does extensions cost in Horsham? ### svg]:rotate-180 py-3 text-left text-sm font-semibold text-card-foreground hover:no-underline md:py-4 md:text-base" data-radix-collection-item="">How long does the work take? ### svg]:rotate-180 py-3 text-left text-sm font-semibold text-card-foreground hover:no-underline md:py-4 md:text-base" data-radix-collection-item="">Do you cover the whole of Horsham? ### svg]:rotate-180 py-3 text-left text-sm font-semibold text-card-foreground hover:no-underline md:py-4 md:text-base" data-radix-collection-item="">What is the ground like in Horsham? ### svg]:rotate-180 py-3 text-left text-sm font-semibold text-card-foreground hover:no-underline md:py-4 md:text-base" data-radix-collection-item="">Do I need planning permission? ### svg]:rotate-180 py-3 text-left text-sm font-semibold text-card-foreground hover:no-underline md:py-4 md:text-base" data-radix-collection-item="">Are you insured and can I see previous work? ## Ready for a new extensions project in Horsham? Book a free site survey and get a written estimate for your Horsham property. 14+ years of experience, 5.0 rated, no obligation. Request a Free Estimate07784 144802 ### Other work we do in Horsham Driveways HorshamPatios & Paving HorshamLandscaping Horsham ### Extensions in nearby towns Extensions CrawleyExtensions ReigateExtensions East Grinstead Quality builds that stand the test of time. Serving West Sussex and surrounding areas for over 14 years. - ServicesLandscaping - Driveways - Patios & Paving - Extensions - Bricklaying - Fencing - Carpentry - Groundworks - Garden Renovations Areas We Cover - Crawley - Horsham - Redhill - Brighton - East Grinstead - Burgess Hill - Haywards Heath - Horley - Reigate Contact - 07784 144802 - burtonbuilds@hotmail.com - Furnace Green, CrawleyHours Monday – Sunday: 08:00 – 18:00 ### Popular Local Pages Driveways in CrawleyDriveways in HorshamDriveways in ReigateDriveways in East GrinsteadPatios & Paving in CrawleyPatios & Paving in HorshamPatios & Paving in ReigatePatios & Paving in East GrinsteadLandscaping in CrawleyLandscaping in HorshamLandscaping in ReigateLandscaping in East GrinsteadExtensions in CrawleyExtensions in HorshamExtensions in ReigateExtensions in East Grinstead AboutServicesAreasOur WorkContactPrivacy PolicyTerms & ConditionsCookie Policy © 2026 Burton Builds. All rights reserved. Call NowFree Estimate We use essential cookies to run this site and, with your consent, analytics cookies to improve it. See our cookie policy. AcceptReject