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Service Guide

House Extension Guide (UK 2026)

Plan and deliver single-storey, rear, or side-return extensions with practical layout, cost, and build-sequencing control.

Typical UK range: £500–£3,000 for small structural work, £15,000–£80,000+ for extensions and conversions | Typical timeline: 2–4 weeks for small projects, 3–6 months for extensions and conversions

Common homeowner triggers

  • Need more living space without moving home
  • Growing family requirements and layout bottlenecks
  • Kitchen-diner expansion plans for modern living
  • Desire to increase property value with usable floor area

What this service normally includes

  • 1

    Feasibility checks, planning route guidance, and budget framing

  • 2

    Extension shell, roof, structural opening, and weatherproofing delivery

  • 3

    Core first-fix coordination with electrical and plumbing trades

  • 4

    Final internal fit-out, finishes, and handover-ready snagging

Quote quality checklist

  • • Extension size, shape, and structural complexity
  • • Planning status and party-wall constraints
  • • Ground conditions, drainage, and utility rerouting scope
  • • Finish specification level and occupancy constraints during works

City pages for House Extension

Use localized pages for pricing context, local pathways, and quote-ready scope.

House Extension in London

Local specialist, cost, and near-me continuity for London.

Open city guide

House Extension in Manchester

Local specialist, cost, and near-me continuity for Manchester.

Open city guide

House Extension in Birmingham

Local specialist, cost, and near-me continuity for Birmingham.

Open city guide

House Extension in Leeds

Local specialist, cost, and near-me continuity for Leeds.

Open city guide

House Extension in Glasgow

Local specialist, cost, and near-me continuity for Glasgow.

Open city guide

House Extension in Liverpool

Local specialist, cost, and near-me continuity for Liverpool.

Open city guide

Related builder service guides

Continue planning with adjacent installation and repair pathways.

Loft Conversion

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