--- title: "Loft Conversions London | AC Roofing & Carpentry" description: "Professional loft conversions in North London. Dormer, hip-to-gable, Velux & mansard. Add space and value to your home. Call 07415 302 589." lang: en json-ld: | [ { "@context": "https://schema.org", "@type": "RoofingContractor", "@id": "https://acroofingandcarpentry.co.uk/#organization", "name": "AC Roofing And Carpentry Ltd", "url": "https://acroofingandcarpentry.co.uk", "logo": "https://acroofingandcarpentry.co.uk/favicon.png", "image": "https://acroofingandcarpentry.co.uk/favicon.png", "telephone": "+4407415302589", "email": "info@acroofingandcarpentry.co.uk", "description": "Expert roofing services across North London. Flat roofs, repairs, replacements & emergency call-outs. 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Dormer, hip-to-gable, Velux & mansard. Add space and value to your home. Call 07415 302 589.", "url": "https://acroofingandcarpentry.co.uk/services/loft-conversions", "provider": { "@id": "https://acroofingandcarpentry.co.uk/#organization" }, "areaServed": { "@type": "Place", "name": "North London, Greater London" }, "serviceType": "Roofing" }, { "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "How much does a loft conversion cost?", "acceptedAnswer": { "@type": "Answer", "text": "Velux conversions start from around £25,000–£35,000. Dormer conversions range from £35,000–£55,000. Hip-to-gable with dormer from £45,000–£65,000. Mansard conversions from £55,000+. We provide detailed, fixed-price quotes after survey." } }, { "@type": "Question", "name": "How long does a loft conversion take?", "acceptedAnswer": { "@type": "Answer", "text": "Most conversions take 6–8 weeks from start to completion. More complex projects (mansard, hip-to-gable) may take 8–10 weeks." } }, { "@type": "Question", "name": "Do I need planning permission?", "acceptedAnswer": { "@type": "Answer", "text": "Many loft conversions fall under permitted development and don't need planning permission. Mansard conversions and properties in conservation areas typically require planning approval. We advise on this during the feasibility survey." } }, { "@type": "Question", "name": "Can I stay in the house during the work?", "acceptedAnswer": { "@type": "Answer", "text": "Yes. Most of the work is external or in the loft space. There will be some disruption when the staircase is installed and when first-floor connections are made, but you can remain in the property throughout." } }, { "@type": "Question", "name": "Will it add value to my property?", "acceptedAnswer": { "@type": "Answer", "text": "Yes. A well-executed loft conversion typically adds 15–20% to your property's value. In many North London postcodes, the added value exceeds the cost of the conversion." } }, { "@type": "Question", "name": "Is my loft suitable?", "acceptedAnswer": { "@type": "Answer", "text": "Most lofts with a ridge height of 2.2m or more are suitable for conversion. The best way to find out is to book a free feasibility survey — we'll measure your loft and advise on the options." } }, { "@type": "Question", "name": "What building regulations apply?", "acceptedAnswer": { "@type": "Answer", "text": "Loft conversions must comply with Building Regulations covering structure, fire safety (Part B), thermal performance (Part L), sound insulation (Part E), and staircase design (Part K). We handle all compliance as part of the project." } }, { "@type": "Question", "name": "Do you handle the full project or just the roof?", "acceptedAnswer": { "@type": "Answer", "text": "We handle the full project — structural steelwork, dormer construction, roofing, insulation, staircase, plastering, electrics, and plumbing. You deal with one contractor from start to finish." } } ] }, { "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Home", "item": "https://acroofingandcarpentry.co.uk/" }, { "@type": "ListItem", "position": 2, "name": "Services", "item": "https://acroofingandcarpentry.co.uk/services" }, { "@type": "ListItem", "position": 3, "name": "Loft Conversions", "item": "https://acroofingandcarpentry.co.uk/services/loft-conversions" } ] } ] --- [![AC Roofing & Carpentry Ltd — Professional Roofing Services North London](/assets/logo-riAr1gOo.png)](/) [Home](/) [Services](/services) [Areas We Cover](/areas)[Our Work](/our-work)[About](/about)[Reviews](/reviews)[Blog](/blog)[Contact](/contact) [07415 302 589](tel:07415302589)[Get a Free Estimate](/contact) 1. [Home](/) 2. [Services](/services) 3. Loft Conversions Loft Conversions — North London # Loft Conversions That Add a Room, Add Value, and Transform Your Home A loft conversion is the single most cost-effective way to add living space to your London property — no extension footprint needed, no garden lost, and up to 20% added to your home's value. [Get a Free Estimate](/contact) [Call Now](tel:07415302589) ★ Building regs compliant · Structural calculations included · Dormer, Velux & mansard 15+ Years Experience 2,000+ Jobs Completed Written Guarantee Fully Insured Same-Day Response ## Is a Loft Conversion Right for Your Property? A loft conversion transforms unused roof space into a functional living area — typically a bedroom, home office, playroom, or bathroom. In London, where space is at a premium and moving costs are prohibitive, a loft conversion delivers more usable square footage per pound than any other type of home improvement. Most London properties are suitable for loft conversion, provided the existing head height is at least 2.2 metres at the ridge. Victorian and Edwardian terraces, semis, and many post-war properties can typically accommodate a dormer or Velux conversion within permitted development rights — meaning no planning permission required. At AC Roofing & Carpentry Ltd, we handle loft conversions from initial design through to completion — including structural steelwork, dormer construction, roofing, insulation, staircase installation, plastering, and electrics. As roofing specialists, we bring a depth of expertise to the roof structure that general builders simply don't have. We carry out loft conversions across North London including Islington, Hackney, Camden, Finsbury Park, Hampstead, and surrounding areas. Every conversion is designed to meet Building Regulations, includes structural calculations by a qualified engineer, and is signed off by building control. Real Work ## See Our Loft Conversions Projects ![Loft conversion structural steelwork with new roof rafters and blockwork walls](/assets/loft-rafters-blockwork-Do0i6GHH.webp) ![Loft conversion roof structure with scaffolding during construction phase](/assets/loft-structure-scaffolding-DuEyCQk5.webp) ![New floor joists installed for loft conversion extension in North London](/assets/loft-floor-joists-B-x1L04t.webp) ![Loft conversion rafters and blockwork from exterior during build](/assets/loft-rafters-exterior-B5AhVfZ_.webp) [View all our completed roofing projects](/our-work) ## The Cost of Ignoring Your Biggest Untapped Asset London property prices mean every square metre matters. An unused loft in a typical North London terrace represents 25–40m² of potential living space sitting empty above your head. At London's average price per square metre, that's £75,000–£200,000 worth of space doing nothing. The alternative — moving to a larger property — comes with its own crushing costs. Stamp duty, estate agent fees, solicitor fees, removal costs, and the emotional upheaval of moving. For many London families, these costs amount to £30,000–£50,000 before you even consider the higher mortgage payments. A loft conversion typically costs £35,000–£60,000 and adds 15–20% to your property's value. In most North London postcodes, the conversion pays for itself in added property value — making it one of the rare home improvements that's genuinely an investment, not just an expense. Every month you spend in a home that's too small, paying a mortgage on unused space above your head, is a month of missed potential. A loft conversion takes 6–8 weeks and gives your family the room it needs without the upheaval and cost of moving. How We Work ## Our Loft Conversion Process 1 ### Feasibility Survey We assess your loft's suitability, take measurements, and discuss your vision. 2 ### Design & Planning Architectural drawings, structural calculations, and building control submission. 3 ### Structural Work Steel beams installed, floor strengthened, and roof structure modified. 4 ### Build & Finish Dormer built, roofing completed, insulation, staircase, and internal fit-out. 5 ### Sign-Off Building control final inspection, completion certificate issued, and handover. Why It Matters ## What a Loft Conversion Delivers ### 15–20% Value Increase One of the highest-return home improvements available in London. ### No Garden Lost Unlike extensions, a loft conversion doesn't reduce your outdoor space. ### Often No Planning Needed Many conversions fall under permitted development — no planning application. ### 6–8 Week Timeline From start to move-in ready in less than two months. ### Roofing Expertise As roofers first, we understand roof structures better than general builders. ### Full Compliance Structural calculations, fire safety, thermal performance — all handled. ## Loft Conversion Types and Technical Details ### Velux (Rooflight) Conversions A Velux conversion is the simplest and most affordable type. It uses the existing roof structure without any external alterations — rooflights are installed in the existing roof slope to provide light and ventilation. This type works well where the existing loft has sufficient head height (2.2m+ at ridge) and adequate floor area. Velux conversions almost always fall under permitted development and don't require planning permission. They're ideal for home offices, playrooms, and guest bedrooms. ### Dormer Conversions A dormer extends out from the existing roof slope, creating vertical walls and a flat roof that dramatically increases the usable floor area and head height. Rear dormers can span the full width of the property under permitted development (for most houses), providing a large, practical room with full standing height throughout. Dormers are the most popular loft conversion type in London because they maximise space within permitted development limits. We build box dormers, flat-roof dormers, and pitched-roof dormers depending on the property style. ### Hip-to-Gable Conversions Properties with hipped roofs (where the side roof slopes inward) lose significant floor area in the loft. A hip-to-gable conversion extends the end wall vertically and replaces the hip with a gable, reclaiming the lost space. This is particularly common on 1930s semi-detached houses, which typically have a hipped roof on the side away from the party wall. Combined with a rear dormer, a hip-to-gable conversion can create a remarkably spacious loft room from what was previously an unusable roof space. ### Mansard Conversions A mansard conversion alters the roof profile significantly — replacing the rear slope with a near-vertical wall and a flat top. This creates the maximum possible floor area and head height but always requires planning permission because it changes the appearance of the roof. Mansard conversions are common in conservation areas where dormers aren't permitted but mansards have established precedent. They're the most expensive conversion type but deliver the most space. ### Structural Considerations Every loft conversion requires structural modifications. At a minimum, the existing ceiling joists must be strengthened to serve as floor joists (they were only designed to support a plaster ceiling, not furniture and people). Steel beams (typically RSJs or Catnic lintels) are installed to support the modified roof structure and transfer loads to the existing walls. A structural engineer calculates the beam sizes, bearing positions, and load paths. We work with experienced structural engineers and arrange all calculations and building control submissions as part of our service. Common Questions ## Frequently Asked Questions ### How much does a loft conversion cost? ### How long does a loft conversion take? ### Do I need planning permission? ### Can I stay in the house during the work? ### Will it add value to my property? ### Is my loft suitable? ### What building regulations apply? ### Do you handle the full project or just the roof? ## Protect Your Property Today Speak to our team for honest advice and a no-obligation estimate. Most quotes delivered within 24 hours. [Get Your Free Quote](/contact) [07415 302 589](tel:07415302589) ### Related Services - [New Roofs](/services/new-roofs) - [Flat Roofs](/services/flat-roofs) - [Roof Replacements](/services/roof-replacements) - [Fascias and Soffits](/services/fascias-and-soffits) ### Areas We Serve [Islington](/areas/islington)[Hackney](/areas/hackney)[Camden](/areas/camden)[Hampstead](/areas/hampstead)[Finsbury Park](/areas/finsbury-park)[Archway](/areas/archway)[Harringay](/areas/harringay)[Muswell Hill](/areas/muswell-hill) [← Home](/)· [All Services](/services)· [Free Estimate](/contact)· [Our Work](/our-work)· [Reviews](/reviews) [![AC Roofing & Carpentry Ltd — trusted roofers in North London](/assets/logo-riAr1gOo.png)](/) Professional [roofing services](/services) across North London. Quality workmanship, fair prices, guaranteed results. [07415 302 589](tel:07415302589) [info@acroofingandcarpentry.co.uk](mailto:info@acroofingandcarpentry.co.uk) 106 Dartmouth Park Hill, London N19 5HT [FMB Member](https://www.fmb.org.uk/builder/ac-roofing-carpentry-ltd.html)[TrustATrader](https://www.trustatrader.com/traders/ac-roofing-and-carpentry-ltd-roof-coating-n7-and-n19)[](https://www.instagram.com/acroofingltd/) [Roofing Services](/services) - [Flat Roof Installation](/services/flat-roofs) - [New Roof Installation](/services/new-roofs) - [Roof Repairs London](/services/roof-repairs) - [Roof Replacement Service](/services/roof-replacements) - [Emergency Roof Repairs](/services/emergency-roofers) - [Commercial Roofing London](/services/commercial-roofer) - [Fascia & Soffit Replacement](/services/fascias-and-soffits) - [Loft Conversion Roofing](/services/loft-conversions) - [Gutter Replacement](/services/gutter-replacement) - [Flat Roof Repairs](/services/flat-roof-repair) - [Felt Roof Installation](/services/felt-roofs) - [Fibreglass Roof London](/services/fibreglass-roofs) - [Rubber Roof Installation](/services/rubber-roofs) [Areas We Cover](/areas) - [Roofer in Islington](/areas/islington) - [Roofer in Hackney](/areas/hackney) - [Roofer in Camden](/areas/camden) - [Roofer in Hampstead](/areas/hampstead) - [Roofer in Finsbury Park](/areas/finsbury-park) - [Roofer in Archway](/areas/archway) - [Roofer in Harringay](/areas/harringay) - [Roofer in Westminster](/areas/westminster) - [Roofer in Muswell Hill](/areas/muswell-hill) - [Roofer in Belsize Park](/areas/belsize-park) - [Roofer in Swiss Cottage](/areas/swiss-cottage) Company - [About AC Roofing](/about) - [Customer Reviews](/reviews) - [Roofing Portfolio](/our-work) - [Roofing Blog](/blog) - [Current Offers](/specials) - [Get a Free Estimate](/contact) Guides - [Spot Roof Damage Early](/blog/how-to-spot-roof-damage-early) - [New Roof Cost Guide 2026](/blog/how-much-does-a-new-roof-cost-in-london) - [Flat vs Pitched Roof](/blog/flat-roof-vs-pitched-roof-which-is-better) [Privacy Policy](/privacy-policy)[Terms & Conditions](/terms-conditions)[Cookie Policy](/cookie-policy) © 2026 AC Roofing And Carpentry Ltd. 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