Side return extensions · Fulham

Side return extensions in Fulham

Our side return extensions service covers Fulham and the rest of London. You get a fixed price in writing for the agreed specification, and one person co-ordinating the trades.

Covering Fulham

Our coverage around Fulham (SW6) also includes Chelsea (1 miles to the east) and Putney.

Homes in London

Much of London’s housing is Victorian and Edwardian terraces, which is why side return extensions, rear dormers and mansards are so common. Many streets are in conservation areas, and several boroughs use Article 4 directions that remove some permitted development rights.

What do you get with a side return extension?

Side returns are small in area but heavy in detail: party walls, a glazed roof, and steelwork to take out the original back wall. We design the roof for light and drainage, agree the party wall process early, and keep the work tidy because access is often through the house.

  • Party wall notices and surveyor liaison
  • Glazed or solid roof with rooflights
  • Drainage and new gully positions

What will a side return extension cost?

Guide prices for side return extensions, including VAT where it applies. Your fixed price is confirmed in writing after the survey.

Side return extensionsGuide price incl. VAT
Standard specification£3,350 to £3,700 per m²
Good specification£3,700 to £4,150 per m²
High specification£4,150 to £4,550 per m²

Planning and building rules in Fulham

Projects in England go through two separate checks. Planning (or confirmation that the work is permitted development) comes from the district, borough or unitary council, and building regulations approval comes from the council’s building control team or a registered building control approver. Where work touches a shared wall or digs near a neighbour’s foundations, the Party Wall etc. Act 1996 applies.

In England a single-storey rear extension can often go ahead under permitted development: up to 3 m deep on an attached house or 4 m on a detached one, no higher than 4 m, with eaves no higher than 3 m within 2 m of a boundary.

What should I think about before starting?

  • Access is often through the house, so we plan deliveries and protect floors.
  • Many terraces sit in conservation areas, where side extensions need planning permission.

How does the project run?

  1. Start with a conversation. A short call or the online form is enough for us to understand what you want to build.
  2. Survey at your house. We look at the existing structure, services and access, and agree what the design needs to achieve.
  3. Design and fixed price. You get drawings and a written price for the agreed specification before anything is ordered.
  4. Build and hand over. Our teams build to the programme, building control inspects, and you get the completion paperwork at the end.

Side return extensions: common questions

How much does a side return extension cost?

Usually about £3,350 to £4,550 per square metre including VAT, which works out at around £35,000 to £55,000 for a typical side return before the kitchen.

How long does a side return take?

About 10 to 14 weeks on site.

Who deals with the council for a project in Fulham?

We do. We prepare the drawings, submit planning or permitted development paperwork if needed, and arrange building control inspections.

Other towns nearby

Learn more about side return extensions, or see every project we cover in Fulham.

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