The Smart Solution for Loft Conversions · All 32 London boroughs
Loft Conversions in London
Dormer, hip-to-gable, mansard and Velux conversions — handled end to end, including building control and party wall.
Loft conversion, rear elevation
Rear loft conversion with new windows and Juliet balcony on a brick terraceWhat we do
From erecting scaffolding and waste disposal to the regulated supply of gas and electrics, we run loft conversions as a single contract. London's roof spaces differ enormously by borough — a Victorian terrace in Walthamstow, a 1930s semi in Hornchurch and a mansion block in Westminster each demand a different structural approach — so every conversion starts with a survey, not a template.
Included as standard
- Structural survey and engineer's calculations
- Drawings and building control application
- Party Wall Act notices and awards where required
- Scaffolding erection, licence and removal
- Steel beams, floor joists and structural work
- Dormer construction, roofing and insulation to current Part L
- Staircase design and installation to Part K
- Fire safety, escape route and Part B compliance
- Full electrics, plumbing and en-suite where specified
- Plastering, decoration and final clean
- Typical timescale
- 6–12 weeks on site
- Coverage
- 32 boroughs
- Payment
- In arrears
- Trading since
- 2008
Planning and building control for loft conversions
Most loft conversions are permitted development, subject to a volume allowance: 40 cubic metres on a terraced house and 50 cubic metres on a semi-detached or detached one. Dormers must be set back from the original eaves and cannot sit forward of the roof plane facing a highway.
That allowance is cumulative across the life of the building, not per owner. If a previous owner already built a dormer, some or all of the volume may be spent — worth establishing before anyone draws anything.
Fire safety drives more of a loft conversion's design than most people expect. Part B requires a protected escape route, which usually means fire doors to every habitable room off the stair and, in a three-storey house, an enclosed staircase. Part K governs the stair itself: headroom, pitch and going.
Structurally, the existing ceiling joists are almost never adequate as floor joists. New floor joists are installed alongside them, usually bearing onto steel beams, all sized by a structural engineer and inspected by building control.
The limits above are the national permitted-development rules for England. Your borough may restrict them further through a conservation area or an Article 4 direction — we confirm the position for your address in writing before quoting.
Our work
Loft Conversions we have completed
Answers
Loft Conversions — common questions
Do I need planning permission for loft conversions in London?
It depends on the property type and what is proposed. Many single-storey rear extensions and loft conversions fall under permitted development, but those rights do not apply to flats and are restricted in conservation areas or where an Article 4 direction applies. We check the planning position for your specific address before quoting, and tell you in writing which route applies.
How do you price the work?
From a site survey, written up as a fixed and itemised scope before any deposit is discussed. If something genuinely unforeseen appears once work is opened up, it is priced and agreed in writing before we continue — never added to the final invoice after the fact.
When do I pay?
In arrears of work completed. You pay for work that has been done and inspected, not for work that has been promised. This has been how the company operates since 2008.
Do you handle Party Wall notices?
Yes, where the work requires them. Under the Party Wall etc. Act 1996, notifiable work on a shared wall needs 2 months written notice to the adjoining owner, while excavation near a neighbouring structure and building at the line of junction need 1 month. We serve the notices and manage the award process as part of the job.
Will I get certificates at the end?
Yes. Electrical work is tested and certificated under Part P, and building control issues a completion certificate where an application was required. You receive the handover pack — it is what a buyer's solicitor will ask for when you eventually sell.
How long will it take?
It depends entirely on scope, and we give a programme with the written quote rather than a guess on the phone. What we will not do is start a job we cannot resource, which is the usual reason a build stalls halfway through.
By area
Loft Conversions across London
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Loft Conversions by area
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A picture and a postcode tells us more than any enquiry form. You will get a straight answer about cost and whether it needs planning permission.