Estimated Costs - Jeffery and Wilkes

// Plan Your Budget

Estimated Costs

Please use our visual guide with 3D models to gain an immediate estimate for the most common home extension or loft conversion types. Work isn't limited to the types listed, please contact us to discuss your bespoke requirements.

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Home Extensions

Double Storey Side Extension

Detached House, Terraced/ Semi-Detached House (No Rear Addition)

Guide Price: £75,000

Wrap Around Flat Roof Extension

Detached House

Guide Price: £80,000

Wrap Around Crown Roof Extension

Detached House

Guide Price: £87,000

Rear Extension Crown Roof

Detached House

Guide Price: £46,500

Rear Single Story Extension – Flat Roof

Terraced / Semi-Detached House (With Rear Addition)

Guide Price: £42,000

Rear Extension Pitched Roof

Detached House

Guide Price: £45,000

Wrap Around Extension (With Gabled Roof)

Terraced/ Semi-Detached House (With Rear Addition)

Guide Price: £70,000

Side Return and Rear Extension

Terraced/ Semi-Detached House (With Rear Addition)

Guide Price: £70,000

Rear Single Storey Extension

Terraced/ Semi-Detached House (With Rear Addition)

Guide Price: £35,000

Wrap Around Extension

Terraced/ Semi-Detached House (With Rear Addition)

Guide Price: £70,000

Side Return Extension

Terraced/ Semi-Detached House (With Rear Addition)

Guide Price: £40,000

Rear Extension Flat Roof

Terraced/ Semi-Detached House (No Rear Addition)

Guide Price: £35,000

Rear Extension Crown Roof

Terraced/ Semi-Detached House (No Rear Addition)

Guide Price: £41,500

Rear Extension Gabled Roof

Terraced/ Semi-Detached House (No Rear Addition)

Guide Price: £40,000

Rear Extension Pitched Roof

Terraced / Semi-Detached House (No Rear Addition)

Guide Price: £38,000

Loft Conversions

L-Section Conversion

Guide Price: £55,000

Rear Mansard Conversion

Guide Price: £47,000

Hip To Gable With Rear Dormer Conversion

Guide Price: £50,000

Rooflight Conversion

Guide Price: £35,000

Rear Dormer Conversion

Guide Price: £43,000