Basement and cellar conversions · Yeovil

Basement and cellar conversions in Yeovil

We take on basement and cellar conversions in Yeovil as a complete project: survey, drawings, planning or permitted development checks, building control and the construction itself.

Covering Yeovil

We work in Yeovil (BA20) and the places around it, including Bridport, Dorchester and Bridgwater.

Homes in the South West

The South West mixes stone and render cottages, Victorian terraces in the larger towns and modern estates, and many historic centres are conservation areas where materials and roof shapes are closely controlled.

What is included in a basement conversion in Yeovil?

A basement conversion turns an existing cellar into dry, usable rooms, or excavates a new basement under a house. Converting an existing cellar is far simpler and cheaper than digging a new one, and often does not need planning permission.

  • Damp and structural survey
  • Waterproofing design and installation
  • Ventilation, heating and electrics

What will a basement conversion cost?

Typical ranges for basement and cellar conversions. Ground conditions, access and specification move the final figure, which we fix in writing before work starts.

Basement and cellar conversionsGuide price incl. VAT
Existing cellar conversion£1,900 to £3,000 per m²
New basement excavation£4,200 to £6,600 per m²

Planning and building rules in Yeovil

English projects need planning clearance from the local council, building regulations sign-off from building control, and party wall notices where the work is on or near a shared boundary. We prepare and manage all three.

Converting an existing cellar with no external changes usually does not need planning permission in England. Digging a new basement or adding a lightwell often does, and many councils have basement policies.

What can affect a basement conversion?

  • Groundwater levels drive the waterproofing design and cost.
  • A pump for the drainage system needs a battery back-up.

From first call to completion

  1. Start with a conversation. A short call or the online form is enough for us to understand what you want to build.
  2. Survey at your house. We look at the existing structure, services and access, and agree what the design needs to achieve.
  3. Drawings, approvals, written quote. We prepare the design, apply for the approvals it needs, and give you a fixed price in writing.
  4. Construction and completion. One site lead co-ordinates every trade through to the building control certificate.

Your questions answered

Does a cellar conversion need planning permission?

Usually not if nothing changes outside. New basements and lightwells often do.

How long does it take?

About 6 to 12 weeks for a cellar conversion and 16 to 30 weeks for a new basement.

Do you work in Yeovil?

Yes. Yeovil is within our coverage for basement and cellar conversions, along with nearby Bridport and Dorchester.

Other towns nearby

Learn more about basement and cellar conversions, or see every project we cover in Yeovil.

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