# Trusted Loft Conversions > Plain-English loft conversion guides for homeowners in London and Manchester, plus a free quote request that passes your details to local loft conversion specialists. Trusted Loft Conversions publishes guides on loft conversion types, costs, planning permission and building regulations. It also takes quote requests through an online form and passes them to local specialists. It does not carry out building work and does not guarantee any specialist's work. Cost figures are typical UK ranges from published guides, checked October 2026, and are not quotes. Planning and building rules described are for England. There is no public phone number or email address; the contact form is the way to reach the site: https://www.trustedloftconversions.co.uk/contact/ ## Start here - [Prices](https://www.trustedloftconversions.co.uk/prices/): typical UK costs for each loft conversion type, with sources. - [Conversion types](https://www.trustedloftconversions.co.uk/services/): Velux, dormer, hip-to-gable and mansard compared. - [London guide](https://www.trustedloftconversions.co.uk/london/) and [Manchester guide](https://www.trustedloftconversions.co.uk/manchester/): local housing and planning notes. - [Request quotes](https://www.trustedloftconversions.co.uk/contact/): the free quote form. ## Key facts - Loft Conversion: typical UK cost £15,000 to £85,000+, about 4–14 weeks on site - Dormer Loft Conversion: typical UK cost £30,000 to £60,000, about 6–8 weeks on site - Velux Loft Conversion: typical UK cost £15,000 to £35,000, about 4–6 weeks on site - Hip-to-Gable Conversion: typical UK cost £40,000 to £70,000, about 6–10 weeks on site - Mansard Loft Conversion: typical UK cost £45,000 to £85,000+, about 8–14 weeks on site - Loft Bedroom Conversion: typical UK cost £18,000 to £65,000, about 6–10 weeks on site - En-Suite Loft Conversion: typical UK cost £25,000 to £75,000, about 8–12 weeks on site - London costs run about 20 to 25 per cent above national figures (MyJobQuote). - Many rear dormers and roof window schemes fall under permitted development: 40 cubic metres on a terrace, 50 on other houses. - Conservation areas, flats and most mansards need planning permission. - A householder planning application costs £548 in England from 1 April 2026. ## Conversion types and costs - [Loft Conversion](https://www.trustedloftconversions.co.uk/services/loft-conversion/): Turn unused roof space into a bedroom, office or en-suite. [Price guide](https://www.trustedloftconversions.co.uk/prices/loft-conversion/). - [Dormer Loft Conversion](https://www.trustedloftconversions.co.uk/services/dormer-loft-conversion/): A box-shaped extension that adds headroom and floor space. [Price guide](https://www.trustedloftconversions.co.uk/prices/dormer-loft-conversion/). - [Velux Loft Conversion](https://www.trustedloftconversions.co.uk/services/velux-loft-conversion/): Roof windows in the existing slope. The lowest-cost option. [Price guide](https://www.trustedloftconversions.co.uk/prices/velux-loft-conversion/). - [Hip-to-Gable Conversion](https://www.trustedloftconversions.co.uk/services/hip-to-gable-conversion/): Turns a sloping side roof into a vertical gable wall. [Price guide](https://www.trustedloftconversions.co.uk/prices/hip-to-gable-conversion/). - [Mansard Loft Conversion](https://www.trustedloftconversions.co.uk/services/mansard-loft-conversion/): A near-vertical rear wall for the most usable space. [Price guide](https://www.trustedloftconversions.co.uk/prices/mansard-loft-conversion/). - [Loft Bedroom Conversion](https://www.trustedloftconversions.co.uk/services/loft-bedroom-conversion/): A finished loft bedroom with insulation, stairs and a window. [Price guide](https://www.trustedloftconversions.co.uk/prices/loft-bedroom-conversion/). - [En-Suite Loft Conversion](https://www.trustedloftconversions.co.uk/services/en-suite-loft-conversion/): A loft bedroom with its own private bathroom. [Price guide](https://www.trustedloftconversions.co.uk/prices/en-suite-loft-conversion/). - [Planning permission](https://www.trustedloftconversions.co.uk/services/planning-permission/): When permission is needed, the limits and the fees. - [Structural calculations](https://www.trustedloftconversions.co.uk/services/structural-calculations/): What the engineer checks and what it costs. - [All prices](https://www.trustedloftconversions.co.uk/prices/): Typical UK costs for each type, with sources. ## Local guides - [London](https://www.trustedloftconversions.co.uk/london/) and [Manchester](https://www.trustedloftconversions.co.uk/manchester/): city hubs with every area and conversion type. - [Loft conversion in Hackney, London](https://www.trustedloftconversions.co.uk/london/hackney/) - [Loft conversion in Islington, London](https://www.trustedloftconversions.co.uk/london/islington/) - [Loft conversion in Lambeth, London](https://www.trustedloftconversions.co.uk/london/lambeth/) - [Loft conversion in Southwark, London](https://www.trustedloftconversions.co.uk/london/southwark/) - [Loft conversion in Tower Hamlets, London](https://www.trustedloftconversions.co.uk/london/tower-hamlets/) - [Loft conversion in Wandsworth, London](https://www.trustedloftconversions.co.uk/london/wandsworth/) - [Loft conversion in Lewisham, London](https://www.trustedloftconversions.co.uk/london/lewisham/) - [Loft conversion in Greenwich, London](https://www.trustedloftconversions.co.uk/london/greenwich/) - [Loft conversion in Hammersmith, London](https://www.trustedloftconversions.co.uk/london/hammersmith/) - [Loft conversion in Fulham, London](https://www.trustedloftconversions.co.uk/london/fulham/) - [Loft conversion in Didsbury, Manchester](https://www.trustedloftconversions.co.uk/manchester/didsbury/) - [Loft conversion in Withington, Manchester](https://www.trustedloftconversions.co.uk/manchester/withington/) - [Loft conversion in Chorlton, Manchester](https://www.trustedloftconversions.co.uk/manchester/chorlton/) - [Loft conversion in Fallowfield, Manchester](https://www.trustedloftconversions.co.uk/manchester/fallowfield/) - [Loft conversion in Levenshulme, Manchester](https://www.trustedloftconversions.co.uk/manchester/levenshulme/) - [Loft conversion in Rusholme, Manchester](https://www.trustedloftconversions.co.uk/manchester/rusholme/) - [Loft conversion in Longsight, Manchester](https://www.trustedloftconversions.co.uk/manchester/longsight/) - [Loft conversion in Ardwick, Manchester](https://www.trustedloftconversions.co.uk/manchester/ardwick/) - [Loft conversion in Hulme, Manchester](https://www.trustedloftconversions.co.uk/manchester/hulme/) - [Loft conversion in Moss Side, Manchester](https://www.trustedloftconversions.co.uk/manchester/moss-side/) ## Guides - [Loft Conversion Stairs: Where They Go and Space-Saving Layouts](https://www.trustedloftconversions.co.uk/blog/loft-conversion-stairs/): Where to put the stairs in a loft conversion, the layouts that save space, the headroom guidance building control uses and why the stair shapes the design. - [Loft Conversion Types Explained: Dormer, Velux, Hip-to-Gable and Mansard](https://www.trustedloftconversions.co.uk/blog/loft-conversion-types-explained/): Loft conversion types explained: Velux, dormer, hip-to-gable and mansard, with typical UK costs, build times, planning rules and the homes each one suits. - [Dormer vs Mansard Loft Conversion: Which Is Right for You?](https://www.trustedloftconversions.co.uk/blog/dormer-vs-mansard-loft-conversion/): Compare dormer and mansard loft conversions on space, UK cost, planning permission and build time, and see which one suits your roof, street and budget. - [En-Suite Loft Conversion Guide: Plumbing, Costs and Design](https://www.trustedloftconversions.co.uk/blog/en-suite-loft-conversion-guide/): How an en-suite loft conversion works: soil stack position, pumps, ventilation, headroom for a shower, typical UK costs and the rules building control checks. - [Hip-to-Gable vs Rear Dormer Loft Conversion](https://www.trustedloftconversions.co.uk/blog/hip-to-gable-vs-rear-dormer/): Compare hip-to-gable and rear dormer loft conversions on space, UK cost, planning and which roofs suit each, plus why many owners choose to combine the two. - [How to Choose a Loft Conversion Company](https://www.trustedloftconversions.co.uk/blog/how-to-choose-loft-conversion-company/): Ten checks before you hire a loft conversion firm: written quotes, insurance, references, building control, payment terms and the red flags to watch for. - [Does a Loft Conversion Add Value to Your Home?](https://www.trustedloftconversions.co.uk/blog/loft-conversion-adds-value/): How much value a loft conversion can add in the UK, what Nationwide research found, why local prices matter and when the extra room is worth the cost. - [Loft Conversion Building Regulations: What Building Control Checks](https://www.trustedloftconversions.co.uk/blog/loft-conversion-building-regulations/): What building regulations cover in a loft conversion: structure, stairs, fire safety, insulation and electrics, plus inspection stages and final sign-off. - [Loft Conversion Ceiling Height: How Much Headroom Do You Need?](https://www.trustedloftconversions.co.uk/blog/loft-conversion-ceiling-height/): How to measure your loft headroom, why most specialists look for about 2.2 metres at the ridge, and what to do if your loft is too low for a conversion. - [How Much Does a Loft Conversion Cost in London?](https://www.trustedloftconversions.co.uk/blog/loft-conversion-cost-london/): What a loft conversion costs in London in 2026: typical UK price bands for each type, why London runs higher, and the extra costs you should budget for. - [How to Finance a Loft Conversion: Options and Costs](https://www.trustedloftconversions.co.uk/blog/loft-conversion-financing/): Ways to pay for a loft conversion in the UK: savings, remortgage, further advance, loans and credit, with the key points to check before you borrow money. - [Loft Conversion for a Flat: Rules, Lease and Planning](https://www.trustedloftconversions.co.uk/blog/loft-conversion-for-flat/): Can you convert the loft above a flat? Who owns it, what the lease says, why planning permission is needed and how to get your freeholder's consent first. - [Loft Conversion Insulation Guide: Options and Rules](https://www.trustedloftconversions.co.uk/blog/loft-conversion-insulation-guide/): How to insulate a loft conversion: rigid boards, mineral wool and warm-roof options, how to avoid damp and overheating, and what building regulations expect. - [Loft Conversion Planning Permission: The Complete UK Guide](https://www.trustedloftconversions.co.uk/blog/loft-conversion-planning-permission-guide/): When a loft conversion needs planning permission in England: permitted development limits, conservation areas, Article 4 directions, flats, fees and timescales. - [Loft Conversion Planning Refused: What to Do Next](https://www.trustedloftconversions.co.uk/blog/loft-conversion-planning-refused/): What to do if the council refuses planning permission for your loft conversion: read the reasons, change the design, appeal or use permitted development. - [How Long Does a Loft Conversion Take?](https://www.trustedloftconversions.co.uk/blog/loft-conversion-timeline/): How long a loft conversion takes in the UK: build times for Velux, dormer, hip-to-gable and mansard types, plus design, planning and party wall delays. - [Loft Conversion vs House Extension: Which Is Better?](https://www.trustedloftconversions.co.uk/blog/loft-conversion-vs-extension/): Compare a loft conversion with a rear or side extension on space, cost, planning, disruption and value, and see when each one makes the better choice. - [Loft Conversion Home Office: Design, Costs and Rules](https://www.trustedloftconversions.co.uk/blog/loft-home-office-conversion/): How to turn your loft into a home office: stairs, light, heating, power, noise, planning and building regulations, plus typical UK costs for the work. - [Party Wall Agreements for Loft Conversions](https://www.trustedloftconversions.co.uk/blog/party-wall-agreement-loft-conversion/): When a loft conversion needs a party wall notice, how the process works, who pays the surveyor and the typical UK costs of £900 to £3,500 for surveyors in 2026. - [Velux Loft Conversion Guide: Costs, Rules and Headroom](https://www.trustedloftconversions.co.uk/blog/velux-loft-conversion-guide/): A guide to Velux (roof window) loft conversions: typical UK cost of £15,000 to £35,000, the headroom you need, planning rules and the main pros and cons. - [Victorian Terrace Loft Conversion: What You Need to Know](https://www.trustedloftconversions.co.uk/blog/victorian-terrace-loft-conversion/): How to convert the loft of a Victorian terrace: why a rear dormer is the usual choice, the L-shaped option, party walls, planning rules and typical UK costs. ## Optional - [About](https://www.trustedloftconversions.co.uk/about/): What the site does and does not do. - [Contact and quote request](https://www.trustedloftconversions.co.uk/contact/) - [Full text for AI assistants](https://www.trustedloftconversions.co.uk/llms-full.txt) - [Privacy policy](https://www.trustedloftconversions.co.uk/privacy-policy/) and [terms](https://www.trustedloftconversions.co.uk/terms/)