Converted loft living room with a sloping ceiling, a rooflight, exposed brick, a grey sofa and a wooden coffee table

Loft Conversions in Maidstone

Planning a dormer, hip-to-gable or rooflight loft conversion? Compare quotes from up to 3 vetted builders in Maidstone.

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Loft conversions in Maidstone

Rear dormer conversions

A popular choice on Maidstone's terraces, adding full head height and room for a bedroom and shower room.

Hip-to-gable conversions

Extending a sloping side roof up to a vertical gable wall, often with a rear dormer, on inter-war and post-war semis.

Rooflight conversions

Adding roof windows, a floor and insulation where the loft already has enough head height, with no change to the roof shape.

A loft conversion is often the most cost-effective way to add a bedroom, and it doesn't use up any garden. The first question is whether your roof has enough space. As a rough guide, you need at least 2.2 metres of height at the tallest point, measured from the top of the ceiling joists to the underside of the ridge. Much less than that and the options get expensive.

The type of conversion usually follows the house:

  • Victorian and Edwardian terraces often suit a rear dormer, which gives near full head height across the back of the house.
  • Inter-war semis with a hipped roof often suit a hip-to-gable conversion, which squares off the sloping side, usually with a rear dormer too.
  • Many houses built from the 1960s onwards, including many in estates such as Shepway and Park Wood, have trussed-rafter roofs, which leave little open space in the loft. Converting one usually needs new steel or timber beams and a structural engineer's calculations, so expect a bigger job.
  • Where the roof is tall enough, a rooflight conversion, which adds windows in the existing slope, is the cheapest and quickest option.

Many dormer and hip-to-gable conversions can be built under permitted development. The limits include 40 cubic metres of extra roof space for a terraced house and 50 for a semi or detached house, no dormers on a roof slope facing the road, and materials that match the house. These rights don't apply in conservation areas, where you'll need planning permission, and Maidstone borough has 41 of them. In the Holy Trinity Church conservation area, an Article 4 direction means roof changes need planning permission. A Lawful Development Certificate from the council confirms your project is permitted development.

Matching materials matter on older roofs. Many of Maidstone's older houses have natural slate or Kent peg tile roofs, so ask your builder how the dormer will be finished, and whether sound tiles or slates taken off can be reused.

All loft conversions need Building Regulations approval. The main items are a permanent staircase, as a loft ladder won't do for a bedroom, fire safety, floor strength, insulation and sound. On a typical two-storey house, fire safety means a protected escape route down through the house, which usually means fire doors to the rooms off the stairs and landing, and linked smoke alarms.

If your house shares a wall with a neighbour, steel beams resting on the party wall will almost always need a party wall notice. Bats sometimes roost in older roofs, and if there's any sign of them, you'll need a bat survey before work starts.

A dormer conversion typically takes 8 to 12 weeks. Much of the early work happens from scaffolding, so you can usually stay in the house until the new staircase is put in. When comparing quotes, check whether drawings, structural calculations, building control fees and the party wall process are included, and who supplies the windows and stairs. Ask to see lofts they've finished, and check their insurance. Reviews on Trade Pilot come from real, invoiced jobs.

Typical prices

JobTypical UK rangeNotes
Rooflight conversion£22,500–£30,000Where there’s enough head height without a dormer
Rear dormer conversion£40,000–£60,000Depends on size, stairs and whether you add a shower room
Hip-to-gable conversion£50,000–£70,000Common on inter-war semis
Mansard conversion£50,000–£80,000Usually needs planning permission
Architect’s drawings£1,000–£2,000Planning and building regulations drawings
Bat survey, if needed£400–£750Only where there are signs of bats

Typical UK ranges; your quotes depend on the job and access.

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Frequently Asked Questions

Around £22,500 to £30,000 for a rooflight conversion, £40,000 to £60,000 for a rear dormer and £50,000 to £70,000 for a hip-to-gable conversion.

Many dormer and hip-to-gable conversions are permitted development. In a conservation area, or if you exceed the limits, you'll need planning permission.

Often, yes, but many houses of that age have trussed-rafter roofs. Converting one usually needs new beams and a structural engineer's calculations, so ask builders to include the structural work in their quotes.

A rooflight conversion can take four to six weeks. A dormer or hip-to-gable conversion usually takes 8 to 12 weeks.

Yes. Every loft conversion needs Building Regulations approval, covering the stairs, fire safety, structure, insulation and sound.

Usually, if you live in a terraced or semi-detached house and steel beams will rest on the shared wall. Serve notice well before work starts.

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