Loft conversion questions answered

Most loft conversions in North London fall under permitted development and do not need full planning permission, as long as they stay within the volume and height limits and follow the design rules. Mansards, front-facing dormers, flats and homes in conservation areas usually do need permission. We check your property against the current rules and handle any application for you.

Yes. Every loft conversion needs building-regulations approval, separately from planning permission, because it creates a new habitable room. Building regs cover the structure, fire safety, escape routes, insulation, staircase and electrics. This is always part of our service, and your conversion is inspected, signed off and certified on completion so you have the paperwork you need.

As a guide for 2026, a Velux conversion starts from around £30,000, a dormer is commonly £45,000-£65,000, a hip-to-gable around £50,000-£70,000, and a mansard from £60,000-£80,000 or more. These are guide ranges, and we confirm your exact figure in a fixed written quote after a free home visit. See the full loft conversion cost guide.

A typical loft conversion takes around 6-8 weeks on site, depending on the type, size and whether you include an ensuite. A Velux conversion is often quicker, while a mansard usually takes longer and needs planning approval beforehand. We give you a clear schedule with your fixed quote so you always know what happens next.

Yes. A well-built loft conversion that adds a bedroom, and ideally a bathroom, is one of the higher-return home improvements you can make to a North London property, and you get to enjoy the extra space in the meantime. For most families it costs far less than the true cost of moving to a larger home once fees are counted.

Almost always. Once you add stamp duty, estate-agent fees, solicitors, surveys and removals, moving to a bigger home in North London often costs far more than converting the loft you already own. A conversion keeps your street, your neighbours and your school catchment, and there is no chain to depend on.

Yes. An ensuite is one of our most requested features, and a master bedroom with its own bathroom is a favourite with North London families. We handle all the plumbing, waterproofing and ventilation to building-regulations standard, and price the ensuite as a clear option in your quote so you can decide what suits your budget.

A party wall agreement is a formal notice to a neighbour when your work affects a shared wall, which is common on terraced and semi-detached homes. If your conversion needs one, we will let you know early and guide you through the process, so it is handled properly and does not hold up the build or catch you by surprise.

Yes. Every conversion we build is insulated to current building-regulations standards, so the new room is comfortable in winter and summer and meets the same thermal requirements as the rest of your home. Good insulation is built into the fixed price rather than treated as an added extra.

Yes. Every loft conversion comes with our workmanship guarantee and is backed by the £1,000 Checkatrade Guarantee. We are a Checkatrade member since 2019, rated 9.67/10 from 50+ verified reviews, and have passed up to 12 Checkatrade vetting checks, so you can be confident in the team working on your home.

We are based in Edgware and cover Edgware, North London, Enfield, Barnet, Watford, Harrow and Hertfordshire. We carry out domestic and commercial work, undertake insurance work, and offer free estimates, so if you are within our area we would be glad to visit and give you a fixed-price quote.