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Extensions
House extensions, priced line by line.
See what drives the cost of your extension before you commit. One point of contact from estimate to handover.
What we build
Extensions that fit your plans.
- Single-storey rear and side-return extensions
- Wraparound extensions
- Double-storey extensions
- Loft conversions (see loft conversions)
Your quotation sets out exactly what is included and what is not, line by line, including what we manage and what is arranged separately, such as design drawings, structural engineering and planning.
What drives the cost
- Size and footprint
- Ground conditions and foundations
- Structure, including steel and openings
- Glazing and roof lights
- Kitchen and finishes
- Access and existing services
Plan → Cost → Build
Our approach
Plan
We review your drawings and what you want from the space.
Cost
You get an itemised, staged view of the price.
Build
One point of contact, a defined scope and clear updates.
See where the money goes
| Cost area | Allowance |
|---|---|
| Groundworks and foundations | £ ——— |
| Structure and steelwork | £ ——— |
| Roofing | £ ——— |
| Windows and doors | £ ——— |
| Electrical and plumbing | £ ——— |
| Internal finishes | £ ——— |
| Project costs and contingency | £ ——— |
| Indicative range | £ ——— to £ ——— |
This shows how an estimate is laid out. The figures in your own estimate are based on your project. Not a quotation and not any client's price.
Questions
Straight answers
Is an initial estimate a quotation?
Which areas do you cover?
How quickly will I hear back?
Do you build loft conversions and double-storey extensions?
Do I need planning permission?
- Cairo Build Ltd
- Company number 17014115
- £1m insurance cover
- Barnet, Enfield, Walthamstow and surrounding areas
Have plans? Get an initial estimate for your extension.
An initial estimate is an indicative range, not a quotation. No obligation.