Do I need planning permission for a house extension?

Many single-storey rear extensions fall under permitted development rights. However, if your property is in a conservation area, is listed, or the extension exceeds size limits, you will need planning permission. Always check with your local planning authority before starting work.

How do I know if a builder is trustworthy?

Look for verified customer reviews, proof of public liability insurance, membership of trade bodies like the FMB or NHBC, and ask to see examples of completed projects. A reliable builder will provide a detailed written quotation and a realistic timeline.

What is the difference between a builder and a groundworker?

Builders handle the above-ground structure — walls, roofs, and finishes. Groundworkers prepare the site, dig foundations, install drainage, and lay services. Many extension or new build projects require both.

How long does a loft conversion take?

A typical loft conversion takes 6–10 weeks depending on the type (Velux, dormer, or mansard). The structural work takes 2–3 weeks, followed by plastering, electrics, plumbing, and finishing.

SM postcode area

Find trusted Builder professionals in SM

SM covers areas including Sutton, Banstead, Carshalton, Morden. Compare builder quotes with clearer local context for travel, access, materials, parking, and property constraints.

What to include in your builder quote request

Ask every builder to price the same drawings, structural assumptions, and provisional sums.
Confirm whether scaffolding, waste removal, skips, and temporary protection are included or excluded.
Get stage payments tied to visible milestones instead of open-ended weekly billing.
Make sure building control, structural engineer sign-off, and making-good items are priced explicitly.
Confirm the postcode district, parking restrictions, access route, and preferred working hours.

Red flags before hiring

Large cash deposits before materials, drawings, or programme details are agreed.
Quotes that ignore structural unknowns but still promise a fixed total and start date.
Refusal to discuss insurance, references, or who is responsible for building control coordination.
Pressure to skip written scope, staged payments, or neighbour access planning.
Quotes that ignore access, waste, permits, or travel time across the SM area.

Builder quote pages by SM district

District pages keep postcode SEO useful without generating thin full-postcode pages.

Builder in SM1

Sutton, Rose Hill, The Wrythe, Carshalton, Benhilton, Erskine Village

Builder in SM6

Wallington, Beddington, Hackbridge, Roundshaw, South Beddington

Builder in SM5

Carshalton, Carshalton Beeches, Carshalton on the Hill, The Wrythe, Carshalton Village, Eastern St. Helier, Middleton Circle

Builder in SM2

Belmont, South Sutton, East Ewell

Builder in SM4

Morden, Morden Park, Lower Morden, St. Helier

Builder in SM7

Banstead

Builder in SM3

North Cheam