Loft conversions in Bexley
Loft conversion specialists a few minutes from Bexley village. Hip-to-gable and dormer conversions on the 1930s semis of Blendon, and sensitive work in the Old Bexley and Parkhurst conservation areas.
From hipped semis to village roofs
Bexley mixes the borough's easiest loft conversions with its hardest. The 1930s semis of Blendon and the streets around Bexley station have the hipped, cut roofs that hip-to-gable conversions were made for. The Georgian and Victorian houses of Old Bexley village and the villas of Parkhurst sit in conservation areas where any roof alteration needs planning permission and real design care.
Kelmend Construction is based in Sidcup, five minutes away, and our loft conversions service covers all of DA5.
We know your roof
1930s hipped semis
The area's most common house type, with generous hipped roofs and cut roof structures. Almost universally suitable for hip-to-gable conversion.
Georgian and Victorian houses
Conservation area with an Article 4 direction. Roof alterations need planning permission and must be invisible from the street; rear rooflights are often the realistic option.
Victorian and Edwardian villas
Large roof volumes with excellent ridge heights, often able to take two rooms and a bathroom. Conservation area, so rear dormers need planning permission and matching materials.
Detached houses
Substantial roofs on big plots, well suited to hip-to-gable and L-shaped dormer conversions that create a full top floor.
Village and larger homes
North Cray Village and High Beeches are conservation areas with a mix of older cottages and large detached houses.
Interwar and post-war
Mostly straightforward, though post-war houses may have trussed roofs needing structural alteration first.
Types of loft conversion we build in Bexley
Hip-to-gable
Extends the hip end of the roof to a vertical gable, the most effective single alteration on Blendon's 1930s semis. Usually permitted development outside conservation areas.
Hip-to-gable and rear dormer
The combination that delivers the most usable space: a large bedroom, en-suite and often a second room.
Rear dormer
A box dormer from the rear roof slope. On the Parkhurst villas this needs planning permission and materials matching the existing roof.
Velux / rooflight
No change to the roof shape, and often the only option that gets approved in Old Bexley. Also the most affordable way to add a bedroom on a 1930s semi.
Mansard
Changes the rear roof slope to near vertical for maximum headroom. Always requires planning permission and is rarely approved in the conservation areas.
L-shaped dormer
Combines a rear dormer with a side dormer over an existing rear addition. Suits the larger detached houses toward Joydens Wood.
What you need to know before converting a loft in Bexley
Most loft conversions on the interwar streets are permitted development. In Old Bexley, Parkhurst and North Cray the rules are much tighter and the design has to be right first time.
Permitted development
Most Velux, rear dormer and hip-to-gable conversions on Bexley's 1930s semis fall under permitted development outside conservation areas. Volume limits apply: 40m³ for terraced houses and 50m³ for semi-detached and detached. We verify this for your property first.
Conservation areas
Bexley has 23 conservation areas, including eight in Sidcup, Old Bexley, Parkhurst and Red House Lane. Dormers visible from the street in these areas need planning permission, and front dormers are rarely approved.
Article 4 directions
Old Bexley, Old Forge Way, Red House Lane and Brook Street carry Article 4(2) directions removing some permitted development rights, so even modest roof alterations need a full application there.
Interwar character
Bexley's design guidance expects dormers to sit below the ridge, set back from the eaves and clad in materials matching the existing roof. Designing to that from the start avoids refusals.
Building regulations
All loft conversions need building regulations approval covering structure, fire safety, insulation and the staircase. Bexley building control inspects at key stages and we manage the whole process.
Party walls
Hip-to-gable and dormer conversions on semi-detached houses almost always involve the shared wall. We flag this early so notices are served and agreements reached before work starts.
Bexley's conservation areas
Four conservation areas cover parts of Bexley and North Cray, with two more at nearby Crayford:
Old Bexley also carries an Article 4 direction. We check your address against Bexley's current maps at the consultation.
Why Bexley homeowners choose us
Based in Sidcup
We're based in Sidcup, so your roof assessment, your build and any snag afterwards are minutes away.
Hip-to-gable specialists
The hip-to-gable conversion was made for Bexley's 1930s hipped-roof semis. We've delivered it many times and know how to get the most floor area out of the roof.
Bexley Council experience
We know what Bexley's planning team expects of dormers in its conservation areas and what falls cleanly under permitted development elsewhere.
Directly accountable
You deal with us throughout. On a semi-detached street where the neighbours are a wall away, that matters.
Itemised, honest quotes
Fully itemised quotes with no hidden costs. Any changes mid-project are costed in writing first.
Full project management
Structural engineer, building control and any planning application are all managed by us.
Our loft conversion process in Bexley
Free consultation and roof assessment
We visit your property, go into the loft and assess the roof structure, head height and planning position, including conservation area status for your address. We tell you what's feasible, what it will cost and whether planning permission is required before any design work begins.
Design and planning
We work with your architect, or recommend one familiar with Bexley Council. We advise on the planning route and manage the process, including party wall notices.
Detailed quote and contract
Once drawings are finalised we produce a fully itemised quote covering every element of the project. Scope, programme, stage payments and how variations are handled are set out in writing before any work begins.
The build
Structural work, roof alteration, insulation, windows and rooflights, first fix, plastering, second fix and decoration are managed as one programme, with regular updates throughout. The site is kept clean and secure every day.
Staircase and fit-out
The staircase is designed and built to fit the property properly, not squeezed in as an afterthought. Fit-out includes flooring, a bathroom if included, and all finishing trades coordinated without gaps between them.
Building control sign-off
Bexley Council building control sign-off is obtained and we walk the finished loft with you to pick up any snags. The completion certificate is yours to keep. We don't close the job until you're satisfied.
Covering Bexley and the borough
Based in Sidcup and converting lofts across the London Borough of Bexley, including:
Bexley loft conversion FAQs
How much does a loft conversion cost in Bexley?
A Velux conversion typically costs £20,000 to £35,000. A rear dormer runs £35,000 to £60,000. A hip-to-gable with rear dormer typically costs £45,000 to £70,000. A mansard on a Victorian or Edwardian terrace runs £55,000 to £80,000 and upwards. All figures are fully finished. Conversions in the Old Bexley and Parkhurst conservation areas often sit toward the upper end. We'll give you an accurate figure after visiting your property and assessing the roof structure.
Do I need planning permission for a loft conversion in Bexley?
Most conversions on 1930s semis fall under permitted development outside conservation areas. Mansards always need planning. Properties in the local conservation areas or Article 4 areas need permission for most roof alterations. We check the position for your address at the consultation.
Is my 1930s semi suitable for a hip-to-gable conversion?
Almost certainly. The borough's interwar semis have generous hipped roofs and cut roof structures that make hip-to-gable conversions both structurally straightforward and highly effective. The key checks are ridge height, ideally 2.2m or more, and whether the property is in a conservation area. We assess both at the free consultation.
How long does a loft conversion take in Bexley?
A Velux conversion takes 4 to 6 weeks on site. A rear dormer or hip-to-gable takes 8 to 12 weeks. A combined hip-to-gable and rear dormer takes 10 to 14 weeks. A mansard takes 12 to 16 weeks. Planning permission, where required, adds 8 to 13 weeks before work can begin. We'll give you a realistic programme in your quote and stick to it.
Will a loft conversion add value to my Bexley home?
In most cases, significantly. Adding a bedroom with en-suite moves a three-bedroom semi into a different price bracket, and a well-executed conversion typically adds 10 to 20% to value.
Can I stay in my home during the loft conversion?
Yes. Loft conversions are among the least disruptive projects because most of the work happens above the existing living space. The main disruption is the staircase installation, which we plan carefully. Most clients stay at home throughout.
Converting your loft in Bexley?
We're five minutes away. Tell us about your project and we'll come round for a free, no-obligation roof assessment.
No pushy sales. No call centres. Just a straight conversation about your Bexley project.