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Flat roof extensions across Bury St Edmunds

Our design and build teams take on flat roof extensions in Bury St Edmunds, from the first measured survey through planning and building control to the finished room.

  • Guide price in Bury St EdmundsFrom £22,000 inc VAT
  • PlanningOften permitted development (3–4 m), or prior approval up to 6–8 m
  • Build time10–16 weeks on site
  • Postcode districtsIP32, IP33
Flat roof of an extension with a membrane finish, a roof lantern and flat rooflights

What we take care of

  • Parapets or edge trims and flashings to the house
  • Falls and outlets designed to drain properly
  • Warm-roof design with insulation above the deck
  • Membrane choice: single-ply, EPDM or GRP
  • Lanterns or rooflights with upstands

Flat roof extension prices in Bury St Edmunds

Labour and material costs vary across the UK, so for Bury St Edmunds we use our East of England factor (×1.06). The ranges include VAT and exclude design, structural and council fees.

Typical rates in Bury St Edmunds: £1,860 to £3,550 per m² including VAT, depending on specification.

SizeEssentialStandardPremium
3 m × 4 m
12 m²
£22,000 – £26,500£26,000 – £33,500£33,000 – £43,000
4 m × 5 m
20 m²
£37,000 – £43,500£43,000 – £55,500£55,000 – £71,500
5 m × 6 m
30 m²
£55,500 – £65,500£65,000 – £83,000£82,500 – £107,000

Try the guide-price tool to see a range for your own size and finish.

Working in Bury St Edmunds

Our survey diary covers Bury St Edmunds, including IP32, IP33. Nearby, we also take on projects in Stowmarket (13 miles), Newmarket (13 miles), Sudbury (14 miles), Haverhill (16 miles).

Thetford, in Norfolk, is roughly 12 miles from Bury St Edmunds and also on our list. The East of England mixes market-town terraces, inter-war semis and modern estates. Clay soils are common in parts of the region, which can affect foundation design.

Do I need planning permission in Bury St Edmunds?

In England a single-storey rear extension can usually go up to 3 m beyond the original rear wall of a semi-detached or terraced house, or 4 m on a detached house, without a planning application, provided it is no more than 4 m high, keeps eaves to 3 m within 2 m of a boundary and, with other buildings, covers no more than half the land around the original house. The larger home extension prior approval scheme raises those depths to 6 m and 8 m, with neighbours notified and a 42-day decision.

Homes in conservation areas, national parks, National Landscapes (formerly AONBs), the Broads and World Heritage Sites have tighter rules, so we always check the property's status and planning history before design starts.

Building regulations approval is separate from planning. In England you can use the council's building control team or a registered building control approver; a full plans application gets the drawings checked before work starts, and the inspector signs the work off with a completion certificate.

Applications are decided by the local planning authority (your district, borough or unitary council).

What happens next

Site visits are free and there is no obligation. Where drawings are needed, the design stage is priced in writing before it starts.

  1. Free site visit

    We visit your Bury St Edmunds home, measure up, talk through what you want and check the planning position.

  2. Design and approvals

    Drawings are prepared and agreed with you, then submitted for the right planning route and building regulations approval.

  3. Fixed written price

    We confirm the build price in writing, based on the approved drawings and the finishes you have chosen.

  4. Build and sign-off

    Work is carried out to the agreed programme, inspected by building control and signed off at the end.

Flat roof extension questions answered

Will my neighbours in Bury St Edmunds be involved?

If a planning application or prior approval is needed, the council notifies neighbours. If the work is on or near a shared boundary, party wall notices may also be needed.

How long does a flat roof extension take to build in Bury St Edmunds?

On site, typically 10 to 16 weeks once approvals are in place. Before that, allow 4–12 weeks design and approvals.

Who do I contract with for a flat roof extension in Bury St Edmunds?

Your contract is with S&K Property Investments and Improvement Ltd, which designs and manages the project and the build teams who carry it out.

Can I walk on a flat roof extension?

Only for maintenance unless it is designed as a terrace. A roof terrace or balcony needs planning permission and a different structure.

Are flat roof extensions cheaper?

Usually slightly, because there is less roof structure and no tiles. Our guide range is about £1,860 to £3,550 per m² including VAT.

Book a free site visit in Bury St Edmunds

We will measure up, check the planning position and give you honest guide figures.

  • Free, no-obligation site visit
  • Planning route checked before you spend on drawings
  • Written price once the design is agreed
  • Building control sign-off at the end

Prefer to talk? Call 0800 088 6341 or .

Book a free site visit

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