Serving Staines-upon-Thames & SurreyMon–Sun · 8am–6pm info@dabplasteringbuilding.co.uk07834 974462Facebook HomeAboutServicesPlasteringVenetian & Polished PlasterCeilings & Artex RemovalHouse RenovationsExtensionsLoft ConversionsGarage ConversionsMedia WallsGarden RoomsKitchensBathroomsExternal RenderingTilingFlooringCommercial Work AreasStaines-upon-ThamesEghamAshford (Surrey)ChertseySunbury-on-ThamesWeybridgeWindsorFelthamKingston upon Thames Our WorkReviewsContact07834 974462Get a Free Quote HomeServicesLoft Conversions Staines-upon-Thames · Surrey # Loft ConversionsExtra Bedroom, En-Suite Or Office— Staines-upon-Thames & Surrey. Turn dead loft space into a properly insulated, Building-Regs-signed-off room. Dormers, hip-to-gables and Velux conversions delivered by one team, with a structural engineer on staff — no chasing anyone. Get My Free Quote Call 07834 974462 5.0 rated · 9 verified Yell reviews£10M public liabilityFixed quote in 2–3 days 15+ Years in the trade 5.0★ Rated on Yell £10M Public liability 2–3d Quote turnaround 9 Surrey towns served The service ## Loft Conversions — The Short Version. A plain-English overview of what the DAB team delivers, who it's for and when it matters. No marketing filler. What it is A loft conversion converts the roof void of a house into habitable space — most commonly a master bedroom, an en-suite, a home office, or a teenage retreat. Types include Velux (rooflight-only), rear dormer, side dormer, hip-to-gable, L-shape (rear dormer plus hip-to-gable) and full mansard. Who it's for Families needing a fourth or fifth bedroom without moving, homeowners wanting a private home-working suite, and property investors looking to add the most value per pound spent on a Surrey property — a loft conversion typically returns 15–20% on the home's value. When you need it When you're outgrowing the ground floor, when a growing teenager needs their own space, or when you're planning long-term and want the top floor ready before the extension footprint is used up. Also when you've maxed out the rear garden and can't extend further at ground level. Why professional help matters Lofts look 'obviously convertible' — and then aren't. Head height, floor structure, staircase compliance, fire escape routes, party wall notices and thermal upgrade are all Building Regs items that catch DIY-managed projects. A specialist contractor gets the compliance right the first time. If it's left too long ## What Goes Wrong When Nobody Fixes It. The specific ways this job goes bad when it's ignored, DIY'd, or handed to the cheapest quote in the WhatsApp group. ### Head height failures Building Regs and mortgage lenders effectively want 2.2–2.3m over the stair and 2.1m across most of the floor. Get it wrong and the space isn't a bedroom, it's storage — with a bedroom price tag. ### Failed fire escape Lofts turn a two-storey house into three storeys under Building Regs. That triggers a fire-protected escape route: 30-minute doors, protected stair, mains-linked alarms. Skip it and the conversion isn't legal. ### Cold in winter, sauna in summer Under-insulated conversions with cheap rooflights are brutal — freezing in January, unusable in July. Modern insulation standards (0.16 W/m²K roof, quality glazing) are the fix. ### Structural bounce Original ceiling joists were sized to hold a ceiling, not a bed and a person. New floor joists need to be sized and installed correctly — not just doubled up on top of the old ones. Our process ## Five Steps. Zero Guesswork. The exact system our team runs on every job — from your first message to the certificate in your handover pack. - 1 ### Feasibility & design Site visit, head-height measurement, structural assessment. Our architect produces drawings, our structural engineer calculates new floor joists, ridge beam and dormer structure. Planning or Permitted Development route confirmed. - 2 ### Fixed quote & programme Detailed quote covering structure, dormer or rooflight, staircase, fire-escape compliance, insulation, first-fix and finishes. Programme with milestones and completion date. - 3 ### Structural work Ridge beam or steels installed, new floor joists at engineer's specification, dormer framing where applicable, roof cut and covered weather-tight. Party wall notices served if required. - 4 ### First & second fix Insulation between and under rafters (Kingspan/Celotex to current U-value), plasterboard, first-fix electrics and plumbing, plaster, staircase installed, fire-doors hung, alarms interlinked. - 5 ### Finish & sign-off Decoration, en-suite tiled and plumbed, flooring laid, Building Control final inspection, completion certificate issued. Handover pack with all certificates and warranty documentation. Why hire the DAB team ## Specific Wins. Not Vague Promises. What you actually get when you hire us for this job — measurable, provable, and reflected in every one of our verified reviews. - ### Value uplift A well-executed loft conversion typically returns 15–20% on the property's value — often the single best investment you can make in the house. - ### No footprint lost You keep the garden. All the extra space is above the existing plan, not eating into outside space. - ### Structural engineer coordinated for you Ridge beams, floor joists and dormer structure calculated in-house — no separate consulting fees, no delays. - ### Building Regs handled Fire escape, insulation, structural, means of escape and glazing all signed off through Building Control. Certificate in your handover pack. - ### Owner-led and insured £10M public liability, 15 years' experience, 5.0 rated on Yell. You're not gambling on an unknown outfit. - ### One team from drawings to snag Architect, engineer, builder, plasterer, plumber and electrician all under one roof — one number to call when a decision needs making. Deep detail ## Materials, Methods & Where It Applies. The specification-level answers the internet usually skips. ### Types of loft conversion Velux (rooflight-only): the cheapest option — no dormer, just carefully placed Velux rooflights. Rear dormer: adds significant head-height and floor area across the rear roof slope. Hip-to-gable: on semi-detached and detached properties, replaces the hipped end with a vertical gable, unlocking full head-height. L-shape: rear dormer plus hip-to-gable — common on Victorian and Edwardian houses. Mansard: full roof replacement, biggest gain in floor area. ### Structural upgrades New steel or engineered LVL ridge beam supporting rafter feet, new floor joists (usually 220mm C24 or engineered I-joists) sized to span between load-bearing walls. Trimmers around the staircase opening. Dormer cheeks framed in structural timber, insulated and clad in tile-hanging, lead or zinc as the elevation allows. ### Fire and means of escape New protected stair enclosure with FD30 fire doors to habitable rooms on each floor, mains-linked interlinked smoke and heat alarms, escape-Velux where a straight-run protected stair isn't achievable. All to Approved Document B. ### Insulation and thermal performance 150mm PIR between rafters plus 50mm below rafters, or a warm-roof build with 200mm PIR above the rafters where head-height is critical. Party walls insulated for acoustic performance, floors insulated with mineral wool between joists. ### Residential specifics Most Surrey loft conversions are residential, on Victorian, Edwardian and mid-century detached or semi-detached properties. Every property is different — head-height and roof pitch drive which conversion type is achievable. We survey first, quote second. Recent work ## Loft Conversions — On the tools. Where we work ## Serving Staines-upon-Thames & Surrey - Staines-upon-Thames - Egham - Ashford (Surrey) - Chertsey - Sunbury-on-Thames - Weybridge - Windsor - Feltham - Kingston upon Thames FAQ ## Loft Conversions — Straight Answers. The questions we're asked at almost every survey. Not on the list? Call 07834 974462 — the DAB team is happy to talk it through. How much does a loft conversion cost in Staines-upon-Thames?+In Surrey, a Velux-only conversion typically starts around £40k. A rear-dormer conversion £55–£75k. A hip-to-gable with rear dormer and en-suite £75–£100k+. All fixed on a written quote after we survey. How long does a loft conversion take?+Velux-only conversions run 6–8 weeks. Rear-dormer conversions 8–12 weeks. Larger L-shape and hip-to-gable conversions 12–16 weeks. We give a firm programme in the quote. Do I need planning permission?+Many loft conversions qualify under Permitted Development, especially rear dormers within the 40m³ (terrace) or 50m³ (semi/detached) volume limits. Hip-to-gables and mansards on flats or in conservation areas usually need planning. We confirm the route at survey. Will my head height be enough?+Minimum useful ridge height is around 2.3m at the highest point. Below that, a Velux conversion is unlikely to be worth the money — but a dormer can create the height where the ridge alone doesn't. What about the staircase?+New stairs are designed to Approved Document K — riser/going ratios, minimum head clearance and landing dimensions. We typically place the new stair over the existing stair to save floor area on the first floor. How disruptive is the work?+Most external work happens through a scaffolded opening in the roof — daily disruption inside the house is limited until first-fix on the new floor. Most clients stay in the property throughout. Do I need a party wall agreement?+If your loft touches a party wall (semi-detached or terrace), a Party Wall notice is required. We serve the notices as standard; if a neighbouring owner appoints a surveyor, our team coordinates the process. Do you cover Egham, Sunbury, Weybridge and Windsor?+Yes — loft conversions across Staines, Egham, Ashford, Chertsey, Sunbury, Weybridge, Windsor, Feltham and Kingston upon Thames as standard. Related work ## You might also need See all services → ### Extensions Foundations to final skim, drawings to building control sign-off. Our team builds side returns, rear extensions, wrap-arounds and full double-storey additions across Surrey — one contractor, one programme, one fixed price. Read more ### House Renovations One owner-led team, one point of contact, one fixed programme. From strip-out to snag list — plastering, joinery, electrics, plumbing, tiling and decoration coordinated so you're never chasing anyone. Read more ### Garage Conversions The cheapest square metre you'll ever gain in your house. We turn dead garage space into a properly insulated, damp-free, plastered and heated room — Building Regs signed off, all in 4–6 weeks. Read more Free quote ## Ready For A Fixed Price On Your Loft Conversions? Free on-site survey. Fixed written quote in 2–3 working days. No pressure, no hidden costs, no unknown extras. The DAB team replies personally. 07834 974462 - Free on-site survey - Fixed written quote in 2–3 days - £10M public liability, owner-led team - One point of contact from quote to snag list "Honestly the tidiest tradesperson I've ever met. Professional, diligent, great attention to detail." — Helen A., verified Yell review. Owner-led plastering and building specialists in Staines-upon-Thames. 15 years, £10M public liability, word-of-mouth reputation. ### Services - Plastering - Venetian & Polished Plaster - Ceilings & Artex Removal - House Renovations - Extensions - Loft Conversions - Garage Conversions - Media Walls ### Areas Covered - Staines-upon-Thames - Egham - Ashford (Surrey) - Chertsey - Sunbury-on-Thames - Weybridge - Windsor - Feltham - Kingston upon Thames ### Contact - 07834 974462 - info@dabplasteringbuilding.co.uk - TW18 2TB, Staines-upon-Thames, Surrey - Leave a Google review - Follow us on Facebook © 2026 DAB Plastering and Building Services. All rights reserved. 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