4.9 · 305+ Reviews · from £42,000

Extensions in Colchester & Essex.

We build extensions from foundations to final coat — kitchens, rear extensions, side-returns and two-storey side extensions. One team, one point of contact, no subcontractor merry-go-round.

Modern single-storey rear extension built by OMP Building in Essex
What we cover

Our extensions scope

  • Single-storey rear & wraparound extensions
  • Two-storey side extensions
  • Kitchen extensions with bi-folds & roof lights
  • Garage conversions
  • Foundations, brickwork, roofing, plastering — all in-house
  • Building control sign-off support
Our Process

How a extensions job runs

  1. Step 1

    Design & planning

    We work alongside your architect or recommend one. Planning advice on permitted development vs. full planning.

  2. Step 2

    Fixed-price tender

    Itemised quote against the drawings — no day-rate surprises.

  3. Step 3

    Build

    Foundations, super-structure, roof, weather-tight, then first & second fix.

  4. Step 4

    Sign-off & handover

    Building control final inspection, snagging list, completion certificate.

Frequently asked

Extensions — your questions answered

Do I need planning permission?+

Most single-storey rear extensions fall under permitted development. We'll advise on a free site visit.

How long does an extension take?+

A typical single-storey rear extension: 10–14 weeks. Two-storey: 16–22 weeks.

Can you work with my architect?+

Absolutely — we regularly tender against existing drawings and value-engineer where it makes sense.

Ready to talk about your project?

Free, no-obligation quotes across Essex. Same-day call back.

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