07834 989360 Mon–Fri, 8am–5pm - AboutServicesAreasOur WorkReviewsContact07834 989360Request an Estimate Home/ - Areas we cover/ - Builders in Bexleyheath Bexleyheath · Rated 5.0 on Google # Wraparound and rearextensionsin Bexleyheath Bexleyheath properties often have the side return and rear garden depth that make a wraparound extension transform the ground floor: and we coordinate the design and build it under one contract. Request an estimate07834 989360 Written, itemised estimate after a survey, no obligation to proceed. 30 yearsof construction experience across the team CABE membersprincipals are members of the Chartered Association of Building Engineers 5.0 starsrated 5.0 from 14 Google reviews One point of contactdesign coordination, planning, procurement, build and supervision under one contract Building in Bexleyheath ## We work in Bexleyheath, and we know its houses Bexleyheath is a short drive from our office at Onega House, 112 Main Road, Sidcup, DA14 6NE, and it is one of the areas we work in most consistently. Surveys and site visits are arranged Monday to Friday, 8am to 5pm. The housing here is largely inter-war and post-war semi-detached and detached, with generous plots by London standards: a side return down one flank and enough rear garden depth to extend without swallowing the whole outside space. That combination is what makes wraparound extensions genuinely worthwhile here rather than merely possible. Because the plots allow it, we also see more double-storey work in Bexleyheath than in the tighter terraced areas: a bedroom and bathroom above a new ground-floor room, which brings foundation depth, party wall matters and the tie-in to the existing roof into the design. Common requests are wraparound and large rear extensions with roof lanterns and bi-folds, double-storey extensions, loft conversions with rear dormers, garden rooms and home offices at the end of longer gardens, and full refurbishment of houses that have not been touched since the 1980s. Wraparound extensions are designed around light and flow, not just floor area: roof lanterns, glazing lines and the position of the kitchen island decide whether the finished space actually gets used, and we make sure the drawings reflect that. Every Bexleyheath project runs through the same five stages: design, planning and preparation, procurement, construction and project supervision, all managed under one contract by a team with 30 years of experience, with principals who are members of the Chartered Association of Building Engineers. You can request an estimate or read more about how we work. ## Get an estimate in Bexleyheath Send us the details and we'll be in touch during working hours, Mon–Fri, 8am–5pm. Services in Bexleyheath ## What we build in Bexleyheath ### Home Extensions Single-storey, double-storey and wraparound extensions, design coordinated and built by one team. Home extensions in Bexleyheath ### Loft Conversions Turn unused roof space into a bedroom, en-suite or office, structurally sound and building-control signed off. Loft conversions in Bexleyheath ### New Build Homes Individual new build homes delivered from design package through to completion. New build homes in Bexleyheath ### Full Refurbishments & Renovations Whole-house refurbishment, kitchens, bathrooms and period property renovation, managed end to end. Refurbishments & renovations in Bexleyheath ### Internal Alterations Knock-throughs, new openings, reconfigured layouts and structural steels installed safely. Internal alterations in Bexleyheath ### Outbuildings & Garden Rooms Insulated garden rooms, home offices, gyms and garages built to last all year. Outbuildings in Bexleyheath ### Architectural Drawings & Design Coordination Survey, concept, planning and construction drawings coordinated with our recommended architects, ready to build from. Drawings & design in Bexleyheath ### Structural Works Steels, foundations, load-bearing alterations and structural repairs. Structural works in Bexleyheath ### Carpentry & Joinery First and second fix carpentry, roof structures, staircases and fitted joinery. Carpentry in Bexleyheath ### Brickwork Extensions, garden walls, repointing and matched brickwork on period properties. Brickwork in Bexleyheath ### Roofing Pitched and flat roofing, dormers, leadwork and roof coverings on new and existing homes. Roofing in Bexleyheath ### Electrical, Plumbing & Gas Coordinated through vetted, accredited subcontractors: NICEIC/NAPIT registered electricians and Gas Safe engineers. Electrical & plumbing in Bexleyheath Why Ashcroft ## Why homeowners in Bexleyheath choose us ### Close to the work Our Sidcup office is a short drive from Bexleyheath, so surveys, design meetings and site presence are straightforward. ### Design for light and flow, not just area Glazing lines, lanterns and the position of the island are designed deliberately, because they decide whether the finished space actually gets used. ### 30 years of experience 30 years of construction experience across the team on residential extension and refurbishment work. ### CABE-member principals Structural design and building regulations compliance sit with principals who are members of the Chartered Association of Building Engineers. ### Rated 5.0 on Google 5.0 stars from 14 Google reviews, built on communication, detail and delivery. ### One contract, one programme Drawings, planning, procurement, construction and supervision are all held under one contract, which matters on larger wraparound builds. Local property issues ## What we typically find on Bexleyheath properties ### Large open-plan spans need real structure Wraparound extensions remove a lot of the original rear and side walls at once. The steel frame carrying that has to be designed and its bearings checked, not sized by rule of thumb. ### Flat roofs over big footprints A wide wraparound roof needs designed falls and correctly positioned outlets. Ponding is the single most common cause of a leak on this kind of roof. ### Overheating from too much glass Bi-folds, sliders and a lantern on a south-facing rear elevation can make a kitchen unusable in summer. Glazing extent and specification are set against orientation for that reason. ### Boundary building and drainage Extending to the boundary brings party wall procedures, eaves overhang and rainwater disposal into play, and existing drain runs frequently cross the new footprint. None of this is unusual, and none of it is a reason not to build. It is the reason we survey before we design and design before we price, so what turns up in Bexleyheath is in the estimate rather than in a mid-build conversation about extra cost. How it works ## Five stages, all managed under one contract - 01 ### Design We take your brief, survey the property and coordinate the drawings and design package with our recommended architects and engineers, so you have no separate consultants to find or brief. - 02 ### Planning & preparation Applications, building control and the programme of works are prepared and coordinated before anyone lifts a tool. - 03 ### Procurement Materials and vetted trades are secured against a fixed scope, so the build starts with everything in place. - 04 ### Construction Your build is delivered by skilled tradesmen working to the agreed drawings, programme and standard. - 05 ### Project supervision A named point of contact supervises the site, handles building control and keeps you updated to completion. Bexleyheath questions ## Frequently asked questions Do you cover Bexleyheath?+Yes. Bexleyheath is one of our regular areas, worked from our Sidcup office at Onega House, 112 Main Road, DA14 6NE. How soon can you visit?+Surveys are arranged during working hours, Monday to Friday, 8am to 5pm, and Bexleyheath is a short drive from our office. What does a wraparound extension cost in Bexleyheath?+It depends on footprint, ground conditions, the amount of structural steel, glazing specification and the kitchen inside it. We survey and issue an itemised written estimate. Will a wraparound need planning permission?+Usually yes, wraparound extensions typically fall outside permitted development. We assess your property and confirm the route before anything is priced. Can you do a double-storey extension?+Yes. Two-storey work is designed by our recommended architects and engineers with us coordinating it, including foundation depth, the tie-in to the existing roof and any party wall requirements. How long will the build take?+Design and the planning route come first, then construction. You get a written programme for your specific project with the estimate rather than a generic timescale. Do you offer emergency call-outs?+No. We deliver planned design-and-build projects, not emergency repairs. Which nearby areas do you cover?+Welling, Bexley, Crayford, Blackfen, Sidcup, Dartford and the wider Kent and South East London area. Rated 5.0 from 14 reviews ## What our clients say “Adam, Robbie and the team were fantastic delivering our kitchen extension and bathroom, great communication throughout and happy to adjust the design as we went.”Peter TingayKitchen extension & bathroom“Adam and Rob's team did an amazing job on our extension, from start to finish they made the process straightforward and painless.”Keith WeirHome extension“Professional, friendly and did a wonderful job creating a new opening between rooms in our Victorian home. Adam communicated clearly throughout. Highly recommend.”Holly MillsStructural opening Coverage ## Areas near Bexleyheath we also serve Builders in BexleyBuilders in WellingBuilders in CrayfordBuilders in BlackfenAll areas we cover Alongside Bexleyheath we work across Welling, Bexley, Crayford, Blackfen and the wider Kent and South East London area from our office at Onega House, 112 Main Road, Sidcup, Kent, DA14 6NE. If you are not sure whether your postcode is covered, contact our Sidcup builders and we will tell you straight away. You can also see examples of our work or start from our home page. ## Planning work in Bexleyheath? Tell us about the property and what you want to achieve, or call 07834 989360. Request an estimate07834 989360 Extension, loft conversion and refurbishment specialists based in Sidcup, working across London, Kent and the surrounding areas. 5.0 from 14 Google reviews Facebook - Instagram ## Services Home extensions - Loft conversions - New build homes - Refurbishments & renovations - Internal alterations - Outbuildings - Drawings & design - Structural works ## Areas we cover - Bexley - Kent - South East London - Welling - Sidcup - Bexleyheath - Dartford - Crayford - Blackfen ## Get in touch - 07834 989360 - info@ashcroftconstructiongroupltd.co.uk - Onega House, 112 Main Road, Sidcup, Kent, DA14 6NEMonday8am – 5pm Tuesday8am – 5pm Wednesday8am – 5pm Thursday8am – 5pm Friday8am – 5pm SaturdayClosed SundayClosed © 2026 Ashcroft Construction Group Ltd. All rights reserved. ReviewsCookie policyPrivacy policyTerms & conditionsPrincipals are members of the Chartered Association of Building Engineers (CABE). 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