07576 538436Salford, WN2 4BN Mon – Fri · 7:00 AM – 7:00 PM · Sat · 8:00 AM – 4:00 PM · Sun · Closed ServicesHouse ExtensionsStructural Work & SteelsLoft Conversions & DormersRoofingGarage ConversionsPorchesFull RenovationsBasement Conversions & UnderpinningKitchens & BathroomsView all → Service AreasSalfordManchesterBoltonWiganStockportOldhamRochdaleBuryWarringtonView all → AboutOur WorkReviewsContact07576 538436Request Estimate Home/Services/Garage Conversions Building Service · Greater Manchester # Garage Conversion Specialistsin Salford & Manchester.From cold storage to liveable room, properly. Convert your single or double garage into a heated, insulated, Building Control-approved room, bedroom, home office, gym, playroom or annexe, on a fixed written price and a 4–6 week programme. Request Estimate Call 07576 538436 Fixed-price quotes · Building Control sign-off included · Written workmanship guarantee 40+ yrs Combined experience 200+ Projects delivered Written guarantee Workmanship Fully insured Insurance Within 48 hrs Quote response Overview ## What it is, who it's for and why it matters. ### What it is A garage conversion changes an unheated, single-skin or attached-garage space into a habitable, insulated, Building Control-compliant room, new sub-floor, fully insulated walls and ceiling, glazing in place of the up-and-over door, heating and electrics, and a finished room ready to use. ### Who it's for Homeowners who never use their garage for a car. Families needing a fifth bedroom, professionals needing a quiet home office with its own external entrance, and growing households needing a playroom, gym or annexe. ### When you need it Before you outgrow the house. A garage conversion typically adds 14–18m² of habitable space at roughly half the cost-per-m² of a new extension, the best-value space upgrade in most Greater Manchester semis. ### Why professional help matters Most garages were built single-skin, on a thin slab, with no DPC and no insulation. Furnishing them without proper conversion creates damp, cold, mouldy 'rooms' that fail Building Control and reduce resale value. A proper conversion is the opposite, it lifts value and lifts the EPC rating. What goes wrong ## The failures we are most often asked to put right. Cheap garage conversions are a false economy. These are the failures we are asked to put right most often. 01 ### Cold, damp floors The original slab has no DPC and no insulation. Carpeting it directly will turn the new room into a permanent cold-bridge with condensation underfoot. 02 ### Single-skin walls Most attached garages are 100mm single-skin masonry. Insulating internally only with thin board creates interstitial condensation and black mould inside 12 months. 03 ### Up-and-over filled with bricks badly The opening needs proper toothing-in, a new cavity-tray DPC and a matched-brickwork infill or full glazing system. Cowboys block-and-render it and call it done. 04 ### No Building Control sign-off Without an approved Building Control completion certificate, the converted room cannot be marketed as habitable and your insurance may not cover it. Our process ## A clear, repeatable system, from first visit to final sign-off. - Step 1 ### Survey & feasibility Free site visit. We assess existing slab, DPC, wall construction, head-height and external level. Confirm what's possible. - Step 2 ### Design & Building Regs Drawings and full-plans Building Regs application, including thermal, acoustic and fire performance for the new room. - Step 3 ### Fixed-price quote Line-by-line written quote, 90-day validity, stage-payment schedule tied to milestones. - Step 4 ### Build phase Slab insulation and screed, wall and ceiling insulation, infill of up-and-over with brick or glazing, electrics, heating, plaster, second fix, decoration. - Step 5 ### Sign-off & handover Building Control completion, electrical certification, snag walk-around, written workmanship guarantee and handover pack. Why work with Renovo ## Concrete outcomes, not vague promises. ### Cost Roughly half the cost-per-m² of a new extension. The structure is already there, we are insulating, finishing and certifying it. ### Speed 4–6 weeks from start to finish for a typical single garage. Written programme issued with the quote. ### No planning headache Most attached garage conversions are Permitted Development and need no planning permission. We confirm on the survey. ### EPC uplift Properly insulating a previously unheated garage lifts the whole property's EPC band, material at sale or remortgage. ### Standalone access Where the garage has its own external door, we can retain it, ideal for home office, treatment room or annexe. ### Resale A correctly converted, certified garage room reliably adds 5–10% to resale value of a Greater Manchester semi. Detail & specification ## The technical detail, for people who want to know how the work is done. Read the technical detailHide the technical detail + ### What conversion typically involves A standard attached single-garage conversion in Greater Manchester involves the following stages. - Damp-proof membrane and 100mm PIR insulation over the existing slab, with a new screed or chipboard sub-floor. - Internal stud wall built off the existing single-skin masonry with 100mm PIR or mineral wool, vapour control layer and plasterboard. - Ceiling insulated to current Part L U-values; new joists where ceiling height permits. - Up-and-over door removed, opening toothed in with matching brick or replaced with full-height glazing. - New radiator or zone added to existing heating system, or electric panel heating where pipework is uneconomic. - Full electrical fit-out, sockets, lighting, smoke detection, certified by NICEIC-registered electrician. ### When conversion does not work A small minority of garages are unsuitable. Detached garages further than 1m from the house need full-foundation upgrade and external thermal envelope; we still convert them, but they price closer to an extension. Garages with high external ground levels (forming a 'tanked' situation) need additional damp-proofing. We tell you on the first visit if either applies. ### Planning & Permitted Development Most attached garage conversions are Permitted Development. Exceptions: properties subject to Article 4 directions (some conservation areas in Salford, Manchester and Stockport), listed buildings, and properties where Permitted Development rights have been removed by a previous planning condition. We check this on every project. ### Residential vs commercial We also convert commercial garage and store spaces (e.g. mews garages, salon stockrooms, light-industrial storage) into office or studio space under change-of-use planning. Standards are higher (fire compartmentation, accessibility) and we handle the application end-to-end. Recent work ## A look at recent projects across Greater Manchester. A selection of finished builds. See the full set on the Our Work page. See all projects Areas covered ## Garage Conversions across Salford, Manchester and Greater Manchester. SalfordManchesterBoltonWiganStockportOldhamRochdaleBuryWarrington FAQ ## Straight answers to the questions clients actually ask. Still got a question? Call us on 07576 538436 or request a callback. How much does a garage conversion cost in Salford?+A standard single-garage conversion in Greater Manchester typically runs £14,000–£22,000 turnkey, including Building Regs, electrics, heating, glazing or brick infill, plaster and decoration. Fixed written quote after free survey. Do I need planning permission?+Most attached garage conversions are Permitted Development. We check Article 4 directions, conservation status and any planning conditions on every job. How long will it take?+Typically 4–6 weeks for a single garage from start to handover. Double garages 5–8 weeks. Written programme issued with the quote. Will it match the rest of the house?+Yes, that is the test. Brick infills are matched on coursing and bond. Glazing systems are colour-matched. Internally, finishes meet your existing skirting profile and floor level where possible. Will I lose the garage doors?+Usually yes. The up-and-over is removed and replaced with brick infill or glazing. If you specifically need car access retained, a side door can be designed in. What about my EPC rating?+A converted, properly insulated garage usually lifts the property's EPC by one band. Useful at sale and for buy-to-let MEES compliance. Can I have a bathroom in the converted garage?+Yes, assuming reasonable proximity to the existing soil stack. We design the drainage at survey stage. Will my house insurance be affected?+Usually no, but you must notify your insurer of a change of use from garage to habitable room. We provide the document set for them. Related services ## Often combined with garage conversions. ### House Extensions Single, double & wrap-around extensions designed around the way you actually live. ### Loft Conversions & Dormers Velux, dormer and hip-to-gable conversions that pass building control first time. ### Full Renovations Whole-house refurbishments managed end-to-end, from strip-out to final coat. Next step ## Turn the cold storage room into a real room. Free survey of your existing garage, written fixed-price quote, and 4–6 week programme. No deposit to find out. Request Estimate 07576 538436 Reassurance - Fixed-price written quote, no day-rate surprises. - Single accountable team, no subcontractor finger-pointing. - Stage payments tied to milestones, no large upfront deposit. - Building Control sign-off and written workmanship guarantee. Specialist extension and structural builders serving Salford, Manchester and the wider North West. Fixed-price quotes, project-managed end-to-end. 07576 538436 jake@renovodesignandbuild.co.uk107 Castlehill RoadSalford, WN2 4BN Mon – Fri · 7:00 AM – 7:00 PM · Sat · 8:00 AM – 4:00 PM · Sun · Closed - @renovodesignandbuild ### Services House Extensions - Structural Work & Steels - Loft Conversions & Dormers - Roofing - Garage Conversions - Porches - Full Renovations - Basement Conversions & Underpinning - Kitchens & Bathrooms ### Service Areas - Salford - Manchester - Bolton - Wigan - Stockport - Oldham - Rochdale - Bury - Warrington ### Company - About - Our Work - Reviews - Contact © 2026 Renovo Design & Build Ltd. All rights reserved. Privacy PolicyTerms & ConditionsCookie PolicyBuilt to last. Fully insured. Salford-based. Call NowFree Estimate