Building an extension is a major investment, and costs in Oldham vary significantly depending on the type, size, and complexity of your project. Single-storey extensions typically range from £15,000–£30,000, whilst two-storey builds can exceed £80,000. Factors like foundation work, building regulations compliance, materials, and site accessibility all influence final pricing. BizHub365 connects Oldham homeowners with experienced local extension builders who provide transparent quotes and quality workmanship.
Extension Builder Prices in Oldham
| Service | Typical Cost | Unit |
|---|---|---|
| Single-storey rear extension (up to 6m²) | £15000 – £25000 | per project |
| Single-storey side extension (6–12m²) | £22000 – £35000 | per project |
| Two-storey extension (12–20m²) | £45000 – £80000 | per project |
| Building regulations approval and inspections | £500 – £1200 | per project |
| Structural engineer design and survey | £400 – £900 | per project |
| Foundation work (per m³) | £800 – £1500 | per m³ |
| Brick and block work (per m²) | £120 – £180 | per m² |
| Roofing installation (per m²) | £150 – £250 | per m² |
Prices are indicative averages for Oldham. Actual quotes will vary based on job specifics.
What Affects the Cost?
Extension costs in Oldham depend on several key factors: the size and complexity of the design, foundation requirements for your soil type, material choices (brick, render, cladding), labour costs, building regulations and structural approvals, site access and existing utilities to relocate, and weather-related delays. Local groundworks firms may charge differently based on soil conditions. Two-storey builds require more complex structural engineering and longer timescales, driving up costs. Bespoke designs and high-spec finishes will increase the budget beyond standard extensions.
Money-Saving Tips
Plan your extension during quieter seasons (autumn/winter) to negotiate better rates with builders. Standardise your design to reduce engineering fees and speed up work. Get multiple quotes from local Oldham builders—prices can vary by 15–20%. Consider phasing the project if budget is tight, and prioritise essential structural work before finishing.
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