- Guide price
- £850–£1,400
- Survey
- Free for new and replacement roofs
- Quote
- Fixed, in writing
- Coverage
- England, Wales, Scotland, NI
Hampshire at a glance
- Largest towns
- Southampton, Portsmouth, Basingstoke, Gosport
- Postcode areas
- BH, GU, PO, RG, SO, SP
- Building control
- Southampton City Council, Portsmouth City Council, Basingstoke and Deane Borough Council and 10 other councils
- Neighbouring areas
- Isle of Wight · Berkshire · West Sussex · Surrey
- Guide price region
- South East (+10% on West Midlands rates)
How much does a porch or bay roof cost in Hampshire?
Guide prices including VAT at South East rates. The fixed price comes after a free survey for new and replacement roofs.
| Job | Guide price inc VAT |
|---|---|
| Porch or bay (4 m²), EPDM | £850–£1,400 |
| Single garage (18 m²), EPDM rubber | £1,750–£3,100 |
| Extension (20 m²), GRP, new deck + insulation | £3,300–£5,900 |
Which flat roofs are common in Hampshire?
Flat roofs in Hampshire sit on 1960s and 1970s link-detached houses with flat-roofed garages and porches, terraced streets with flat-roofed rear kitchens and bathrooms and 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. Approximate 1991–2020 regional averages based on Met Office data.
Building regulations in England
Replacing more than half of a roof over a heated room usually counts as renovating a thermal element, so it is insulated to current standards and notified to building control. Renovated roofs over heated rooms are insulated to around 0.16 W/m²K where that's feasible, and new extension roofs are built to 0.15 W/m²K. In Hampshire the application goes to Southampton City Council, Portsmouth City Council, Basingstoke and Deane Borough Council and 10 other councils. More on the rules.
Why do small porch and bay roofs carry a minimum charge?
Because a small roof needs nearly the same set-up as a larger one: a team, safe access, materials, trims, waste removal and travel. The roof area is only part of the cost.
A 2 m² canopy and a 6 m² bay still both need a full strip, a deck check, edge trims, a wall flashing and the same care at the drip edge. That is why our full re-roofs carry a minimum charge rather than being priced purely per square metre. It is also why bundling makes sense: if you have a porch, a bay and a garage, pricing them together usually works out better than three separate visits.
The junction with the house wall deserves the most attention on a porch. Many leaks blamed on a porch roof are actually water tracking behind a failed flashing or through porous brickwork above. We check the wall, the flashing and the frame head before recommending a new roof. If the problem is only the flashing, a targeted repair may be enough. Our flat roof leaks guide explains how leaks are traced.
How long does a porch roof replacement take?
Most porch and bay roofs are replaced in a single day, weather permitting. GRP or liquid systems may need a return visit for a topcoat once the first coat has cured.
Disruption is minimal. You may need to use another door while a front porch is being re-roofed, and the area below should be kept clear for safety. A ground-floor bay can usually be reached from a tower or platform steps, while a first-floor bay may need a small scaffold. The window below stays usable, though it is best kept closed while resin is curing.
Which towns in Hampshire do we cover?
- Southampton
- Portsmouth
- Basingstoke
- Gosport
- Waterlooville
- Farnborough
- Eastleigh
- Winchester
- Havant
- Andover
- Fareham
- Aldershot
- Fleet
- Totton
- New Milton
- Bordon
- Hythe
- Yateley
- Alton
- Emsworth
- Hedge End
- Romsey
- Hayling Island
- Tadley
Porch, bay and canopy roofs in Hampshire: questions
Which towns in Hampshire do you cover?
All of Hampshire. The main towns have their own pages below, and if yours isn't listed we still cover it: send your postcode and we'll confirm.
How much does a porch or bay roof cost in Hampshire?
£850–£1,400 for a small 4 m² porch or bay roof in EPDM, at South East guide rates including VAT. The fixed price comes after a free survey for new and replacement roofs.
Which postcode areas do you cover in Hampshire?
All of Hampshire, including the BH, GU, PO, RG, SO, SP postcode areas. Send your full postcode and we'll confirm.
Can a bay window roof be replaced without scaffold?
A ground-floor bay usually can, using a tower or platform. A first-floor bay generally needs a small scaffold for safe access.
Does a porch roof need a gutter?
Not always. Many small porches drip straight off the front edge, but a gutter helps over a doorway or path.
Why is my porch roof leaking when the felt looks fine?
The water is often coming from the wall junction, not the roof surface. A failed flashing, cracked mortar or porous brick above can let water in behind the upstand.
Everything about porch, bay and canopy roofs → · All flat roofing in Hampshire →