Dorking at a glance
- Postcode districts
- KT23, RH4
- Population
- about 17,747 (GeoNames)
- Council area
- Mole Valley District Council
- Building approval
- Mole Valley District Council building control, or a registered building control approver
- Nearest main town
- Crawley, about 11 miles
- Guide price region
- South East (+10% on West Midlands rates)
When does a garage roof in Dorking need replacing?
Water from a failing garage roof in Dorking does not always stay in the garage. On an attached garage it can run down the house wall or track under the flashing, and a blocked or broken gutter can spill onto the drive or a neighbour's property. Replacing the roof deals with the source.
In and around Dorking, flat roofs are typically found on 1930s semis with flat-roofed garages and kitchen extensions, and on lock-up garage blocks on estates. Much of the South East sits in the drier Thames catchment at roughly 730 mm of rain a year, so the usual failures are at joints, upstands and outlets rather than from sheer volume of rain.
How much does a new garage roof cost in Dorking?
Guide price in Dorking: £1,750–£3,100 for a typical 18 m² garage roof in EPDM, including VAT at South East rates. The fixed price comes after a free survey for new and replacement roofs.
| Job | Guide price inc VAT |
|---|---|
| Single garage (18 m²), EPDM rubber | £1,750–£3,100 |
| Single garage (18 m²), torch-on felt | £1,650–£2,900 |
| Single garage (18 m²), GRP fibreglass | £1,950–£3,600 |
| Extension (20 m²), GRP, new deck + insulation | £3,300–£5,900 |
Do I need planning permission or building regulations for a garage roof?
Usually not for planning, and often not for building regulations either, if the garage is detached and unheated. Re-covering a roof without materially changing its appearance does not normally need a planning application.
An unheated detached garage is not normally a thermal element, so the insulation rules for renovated roofs do not usually apply. That changes if the garage is attached and heated, used as a room, or being converted. A new roof covering that adds 15% or more to the existing weight, or any structural change, still needs building control approval in England. Wales has its own threshold for re-roofing, Scotland works through building standards and NI through district council building control.
Listed buildings and conservation areas can bring extra controls. We confirm what applies at survey and handle approvals where they are needed; our building regulations page covers the detail.
What's included?
- Free survey of the deck, fall and gutter line
- Written workmanship guarantee, with material guarantees registered where available
- New membrane dressed into fresh edge and drip trims
- Gutter or outlet renewed where the old one has failed
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?
Garage roofs in Dorking: questions
Do you cover Dorking?
Yes. Dorking is part of our Surrey coverage, including postcode districts KT23, RH4. 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 Dorking?
Where the work needs approval it goes to Mole Valley District Council 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 garage roof cost in Dorking?
£1,750–£3,100 for a typical 18 m² garage roof in EPDM, at South East guide rates including VAT. The fixed price comes after a free survey for new and replacement roofs.
Can you put a new roof on a garage with a cement sheet roof?
Yes, once any suspected asbestos has been tested and removed by a licensed specialist. The garage then usually needs new timbers and a deck before the new membrane goes on.
Can you replace a shared garage roof in a block?
Yes. We can quote for one garage in a row or the whole block, and we take care with the joins between bays so neighbouring roofs stay watertight.