07834 989360 Mon–Fri, 8am–5pm - AboutServicesAreasOur WorkReviewsContact07834 989360Request an Estimate Home/ - Areas we cover/ - Builders in Crayford Crayford · Rated 5.0 on Google # Extensions andrefurbishmentsin Crayford We deliver extensions, loft conversions, structural openings and full refurbishments across Crayford, all under one contract with one point of contact. 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 Crayford ## We work in Crayford, and we know its houses Crayford sits between our Sidcup office at Onega House, 112 Main Road, DA14 6NE and Dartford, so it is straightforward territory for us. Surveys and site visits are arranged Monday to Friday, 8am to 5pm. The housing is a mix of Victorian and Edwardian terraces, inter-war semis and post-war housing, much of it on modest plots. That matters, because on a smaller plot a large extension takes garden you cannot get back, and often the better return comes from reconfiguring the space that already exists. Older Crayford properties also sit on ground that has seen a lot of change: the Cray valley, historic industry and infill development all mean made ground and unrecorded drain runs turn up more often than average. Foundation design and drainage are survey items here rather than assumptions. The work we are asked for most is structural openings and knock-throughs to open up narrow ground floors, modest rear extensions, loft conversions for an extra bedroom, kitchen and bathroom replacement, and full refurbishment of houses bought to do up. Crayford's terraces and semis often benefit more from opening up the existing ground floor than from a large extension. We will tell you which gives the better return before you spend on drawings. Every Crayford 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 Crayford Send us the details and we'll be in touch during working hours, Mon–Fri, 8am–5pm. Services in Crayford ## What we build in Crayford ### Home Extensions Single-storey, double-storey and wraparound extensions, design coordinated and built by one team. Home extensions in Crayford ### Loft Conversions Turn unused roof space into a bedroom, en-suite or office, structurally sound and building-control signed off. Loft conversions in Crayford ### New Build Homes Individual new build homes delivered from design package through to completion. New build homes in Crayford ### Full Refurbishments & Renovations Whole-house refurbishment, kitchens, bathrooms and period property renovation, managed end to end. Refurbishments & renovations in Crayford ### Internal Alterations Knock-throughs, new openings, reconfigured layouts and structural steels installed safely. Internal alterations in Crayford ### Outbuildings & Garden Rooms Insulated garden rooms, home offices, gyms and garages built to last all year. Outbuildings in Crayford ### Architectural Drawings & Design Coordination Survey, concept, planning and construction drawings coordinated with our recommended architects, ready to build from. Drawings & design in Crayford ### Structural Works Steels, foundations, load-bearing alterations and structural repairs. Structural works in Crayford ### Carpentry & Joinery First and second fix carpentry, roof structures, staircases and fitted joinery. Carpentry in Crayford ### Brickwork Extensions, garden walls, repointing and matched brickwork on period properties. Brickwork in Crayford ### Roofing Pitched and flat roofing, dormers, leadwork and roof coverings on new and existing homes. Roofing in Crayford ### Electrical, Plumbing & Gas Coordinated through vetted, accredited subcontractors: NICEIC/NAPIT registered electricians and Gas Safe engineers. Electrical & plumbing in Crayford Why Ashcroft ## Why homeowners in Crayford choose us ### Honest advice on what to build Where opening up the existing ground floor gives a better result than extending, we will say so before you spend on drawings. ### Local to Crayford Our Sidcup office is a short drive away, which makes surveys and site attendance easy to arrange. ### 30 years of experience 30 years of construction experience across the team, on extensions, lofts, refurbishments and structural work. ### CABE-member principals Structural design and detailing are handled by principals who are members of the Chartered Association of Building Engineers. ### Rated 5.0 on Google 5.0 stars from 14 Google reviews, with communication and finish quality the most common themes. ### One team, five stages Design coordination, planning and preparation, procurement, construction and supervision are all managed under one contract. Local property issues ## What we typically find on Crayford properties ### Made ground and unrecorded drains Around the Cray valley and former industrial land, foundation depth and drainage connections are frequently not what the plans suggest. Found at survey they are priced; found later they are variations. ### Narrow ground floors Terraces and small semis here have circulation that wastes space. Removing the right wall achieves more than adding two metres to the back, but only with designed steel and building control sign-off. ### Damp in older solid walls Raised ground levels, blocked air bricks, failed pointing and hard cement render cause most of the damp we see in this stock. Diagnosis has to come before replastering. ### Original roofs and rainwater goods Worn coverings, cracked leadwork and undersized or sagging gutters let water into masonry over years. Small repairs early avoid brickwork and internal damage later. 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 Crayford 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. Crayford questions ## Frequently asked questions Do you work in Crayford?+Yes. Crayford is within our regular area, worked from our office at Onega House, 112 Main Road, Sidcup, DA14 6NE. How quickly can you visit a Crayford property?+Surveys are arranged during working hours, Monday to Friday, 8am to 5pm, and we are only a short drive away. What does work in Crayford cost?+It depends on the scope: a single structural opening and a full refurbishment are very different projects. We survey, agree the scope and issue a written estimate itemised by section. Is an extension or a knock-through better value?+On smaller plots, reconfiguring the existing ground floor often delivers more usable space per pound and keeps the garden. We assess both and tell you which suits your house. Do I need approval to remove a wall?+Yes: removing or altering a load-bearing element is notifiable work. We design it, install it and handle the building control notification and inspections. Do you take on whole-house refurbishments?+Yes, whole-house and floor-by-floor programmes, including kitchens, bathrooms, rewires and heating via accredited trades. Do you offer an emergency service?+No. We deliver planned design-and-build projects rather than emergency repairs. Which nearby areas do you cover?+Dartford, Bexleyheath, Bexley, Sidcup, Welling, Blackfen and the wider Kent 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 Crayford we also serve Builders in BexleyBuilders in KentBuilders in BexleyheathBuilders in DartfordAll areas we cover Alongside Crayford we work across Dartford, Bexleyheath, Bexley, Kent 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 Crayford? 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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