Newham at a glance
- Postcode districts
- E13, E6, E16, E7, E15
- Council area
- London Borough of Newham
- Building approval
- London Borough of Newham building control, or a registered building control approver
- Guide price region
- London (+20% on West Midlands rates)
What does a dormer roof in Newham need?
Dormer roofs in Newham are often replaced when the loft room below starts to show damp, particularly along the back wall or around the window head. By then the deck may be wet, so a full rebuild with new insulation is usually the better choice than patching from a ladder.
In and around Newham, flat roofs are typically found on shops with flat-roofed stores below flats above, and on Victorian and Edwardian terraces with flat-roofed back additions. The Thames basin is one of the drier parts of Britain at roughly 730 mm of rain a year, but summer heat is the bigger test here: dark membranes on south-facing roofs swing a long way in temperature.
How much does a new dormer roof cost in Newham?
For Newham we use London rates: £1,700–£3,200 is the guide for an 8 m² GRP dormer roof including scaffold, VAT included. The fixed price comes after a free survey for new and replacement roofs.
| Job | Guide price inc VAT |
|---|---|
| Dormer (8 m²), GRP, scaffold | £1,700–£3,200 |
| Single garage (18 m²), EPDM rubber | £1,900–£3,350 |
| Extension (20 m²), GRP, new deck + insulation | £3,600–£6,450 |
Is GRP or EPDM better on a dormer roof?
GRP fibreglass is often the first choice on a dormer, because it is laid as a liquid resin over a mat and forms neat, rigid edges, corners and drip details on a small roof. It cures to a hard surface that copes with occasional foot traffic during window cleaning or maintenance.
EPDM rubber works well on a plain rectangular dormer and can usually be laid as one sheet, with no field joins. Unlike GRP, it does not depend on resin curing conditions on the day. Torch-on felt can be used, but working a torch close to timber cladding, fascias and tiles needs extra care, so a cold-applied system is often chosen instead.
We recommend the system after surveying the dormer, its edges and how it meets the main roof.
What's included?
- New membrane, drip trims and back-edge abutment under the tiles
- Written workmanship guarantee, with building control handled where needed
- Warm-roof insulation and a vapour control layer
- Scaffold with edge protection, priced in the quote
Building regulations in England
Replacing more than half of a flat roof over a heated room usually counts as renovating a thermal element, so the roof is insulated to around 0.16 W/m²K where that's technically and economically feasible, and the work is notified to building control: the council or a registered building control approver, unless a registered competent person self-certifies it. A roof on a new extension is built to 0.15 W/m²K. Patch repairs, and most unheated detached garages, don't trigger the upgrade. Structural changes, or a new covering that adds 15% or more to the roof's weight, also need approval. More on the rules.
Which nearby areas do we also cover?
- Greenwich · 3 mi
- Redbridge · 3 mi
- Tower Hamlets · 3 mi
- Hackney · 4 mi
- Barking and Dagenham · 4 mi
- Waltham Forest · 5 mi
Dormer roofs in Newham: questions
Do you cover Newham?
Yes. Newham is part of our London coverage, including postcode districts E13, E6, E16, E7, E15. Surveys and roofs are carried out by vetted roofing teams working under S&K Property Investments and Improvement Ltd.
Who checks building regulations for a flat roof in Newham?
Where the work needs approval it goes to London Borough of Newham building control, or a registered building control approver. We tell you at the survey whether your job needs it and deal with the paperwork as part of the quote.
How much does a new dormer roof cost in Newham?
£1,700–£3,200 for an 8 m² GRP dormer roof including scaffold, at London guide rates including VAT. The fixed price comes after a free survey for new and replacement roofs.
Can you replace the lead on my dormer at the same time?
Yes, where lead forms part of the dormer abutment or cheek flashings, we include renewing it in the roof job.
How long does a GRP dormer roof last?
As an indicative range, GRP lasts 20–40 years with good specification and maintenance.