Looking for reliable builders in Ealing? GSM Builders Ltd is a family-run building company based in Hayes, just 20 minutes west of Ealing Broadway. We carry out house extensions, loft conversions, full refurbishments and kitchen and bathroom projects across W5, W13 and W7, from Ealing Common and Ealing Broadway to Northfields, West Ealing and Hanwell.
Building work on Ealing’s Victorian and Edwardian homes
Much of Ealing’s housing stock dates from the 1880s to the 1920s: bay-fronted Victorian terraces around Northfields and West Ealing, larger Edwardian semis near Ealing Common and Castlebar Hill, and 1930s semis further out towards Perivale. These houses respond brilliantly to the right improvements, but they also come with things a builder needs to understand: solid brick walls with no cavity, suspended timber floors, lime mortar, shared party walls and, in many streets, conservation area status.
The most popular projects we are asked for in Ealing are side-return extensions on Victorian terraces (turning a narrow galley kitchen into a wide, light kitchen-diner), rear dormer and hip-to-gable loft conversions to add a master bedroom with en-suite, and whole-house refurbishments for buyers who have just moved in and want to rewire, re-plumb, replaster and reconfigure before decorating.
Planning and conservation areas in Ealing
Ealing Council has more than 25 conservation areas, including Ealing Common, Ealing Green, Castlebar, Hanger Hill Garden Estate and Brentham Garden Suburb. Inside these, some permitted development rights are removed by Article 4 directions, so a rear extension or roof dormer that would be automatic elsewhere may need a full planning application. We check the constraints on your specific address before we quote, prepare drawings, submit the application and deal with the planning officer so you do not have to.
Outside conservation areas, a single-storey rear extension of up to 3 m on a terrace or semi (or up to 6 m under the larger home extension scheme with prior approval) can usually be built under permitted development, and loft conversions of up to 40 m³ on a terrace or 50 m³ on a semi are normally allowed without planning permission. Building Regulations approval is always required, and because almost every Ealing house shares a wall with a neighbour, the Party Wall Act applies too. We serve the notices and work with your surveyor.
Building services we offer in Ealing
- House extensions, single-storey rear, side-return, wrap-around and double-storey
- Loft conversions. Velux, rear dormer, hip-to-gable and L-shaped
- Full property refurbishment and renovations
- Kitchen fitting and kitchen renovation
- Bathroom renovation and wall tiling
- Roofing, plastering, flooring and painting & decorating
- 24/7 emergency call-outs, plumbing, electrics, glazing and boarding-up
Why choose GSM Builders Ltd in Ealing?
- Genuinely local. Our base at Leven Way, Hayes UB3 is about 20 to 25 minutes by road from Ealing, so site visits, quotes and snagging calls are quick and easy.
- One team from start to finish. Design input, structural calculations, Building Control liaison, all trades and decoration under one contract.
- Building Control approved work. Every structural project is signed off with completion certificates you will need when you sell or remortgage.
- Clear written quotes. Itemised pricing, agreed payment stages and no hidden extras.
- Fully insured with public liability cover and a 12-month workmanship warranty.
Typical Ealing projects
- Side-return kitchen extension on a Northfields terrace with steel frame, roof lights and bi-fold doors
- L-shaped dormer loft conversion in West Ealing giving a bedroom, en-suite and study
- Full refurbishment of a three-bedroom Edwardian semi near Ealing Common, including rewire, new heating and replastering
- Bathroom and kitchen renovations in Hanwell flats and maisonettes
What building work costs in Ealing (2026)
These are the 2026 ranges we quote for Ealing (W5, W13 and W7), excluding VAT. They assume a standard specification and reasonable access; the cost calculator gives a figure for your own project, and a free site survey gives you a fixed written price.
| Project | 2026 price (excl. VAT) | Time on site |
|---|---|---|
| Single-storey rear extension (3 m) | £48,000 to £68,000 | 8 to 10 weeks |
| Side-return extension | £45,000 to £65,000 | 8 to 10 weeks |
| Wrap-around extension | £65,000 to £95,000 | 10 to 14 weeks |
| Rear dormer loft conversion | £38,000 to £48,000 | 6 to 8 weeks |
| Hip-to-gable loft with en-suite | £55,000 to £85,000 | 8 to 10 weeks |
| Whole-house refurbishment (3-bed) | £70,000 to £150,000 | 10 to 18 weeks |
| Kitchen fitting (supply & fit) | £12,000 to £30,000 | 2 to 4 weeks |
| Bathroom refit | £8,000 to £20,000 | 2 to 3 weeks |
Drawings, structural calculations and Building Control fees add £2,500 to £4,500. Where planning is needed, Ealing Council charges £548 for a householder application or £249 for prior approval (fees from 1 April 2026). Our planning guide explains which route applies, and the loft conversion comparison covers which loft type suits your roof.
Frequently asked questions
Do I need planning permission for an extension in Ealing?
Outside a conservation area, a single-storey rear extension up to 3 m on a terrace or semi is normally permitted development, and 3 to 6 m is possible with prior approval. Ealing has more than 25 conservation areas with Article 4 directions, including Brentham Garden Suburb, Ealing Common and Hanger Hill, where a full householder application (£548 from April 2026) is usually needed.
What does a side-return extension cost in Ealing?
£45,000 to £65,000 excluding VAT in 2026 for a typical Victorian or Edwardian terrace in Northfields, West Ealing or Hanwell, including the steelwork, roof, glazing and making good. Kitchen units and appliances are usually costed separately.
How quickly can you get to Ealing?
Our yard is on Leven Way in Hayes, about 20 minutes from Ealing, so site visits, deliveries and snagging calls are straightforward. There is no London-wide travel premium in our pricing.
Do you handle Building Control in Ealing?
Yes. Every extension, loft conversion and structural alteration needs Building Regulations approval and a completion certificate regardless of planning. We make the application, book the inspections and hand you the certificate at the end, you will need it when you sell.
Are you insured and do you give a warranty?
Yes, public and employer’s liability insurance, an itemised written quote before anything starts, staged payments against completed work and a 12-month workmanship warranty in writing on every contract.
Nearby areas we also cover
Acton · Greenford & Northolt · Southall · Hayes · West London
Get a free quote from builders in Ealing
Send us your plans, photos or just a description of what you want to achieve and we will arrange a site visit at a time that suits you. Quotes are free, itemised and without obligation.