Citadel Construction
Home
Services
Extension Southend/London
Home Reno Southend/London
Extension cost guide
Permission Advice
Citadel Construction
Home
Services
Extension Southend/London
Home Reno Southend/London
Extension cost guide
Permission Advice
More
  • Home
  • Services
  • Extension Southend/London
  • Home Reno Southend/London
  • Extension cost guide
  • Permission Advice
  • Home
  • Services
  • Extension Southend/London
  • Home Reno Southend/London
  • Extension cost guide
  • Permission Advice

Welcome to Citadel Construction Builder

House Extension Costs Southend & London 2025 | Citadel Construction

Discover average house extension costs in Southend & London for 2025. Get accurate pricing, tips, and a free quote from Citadel Construction.

How Much Does a House Extension Cost in Southend & London?

Planning an extension? Knowing the average cost upfront helps you budget and make confident decisions. Costs depend on size, materials, and style


    

Extension Type


Average Cost Southend


Average Cost London

 

Single-Storey Rear


£18,000 – £35,000


£25,000 – £45,000

 

Double-Storey


£45,000 – £70,000


£60,000 – £90,000

 

Side Return


£25,000 – £40,000


£35,000 – £55,000

 

Wrap-Around


£50,000 – £85,000


£65,000 – £100,000

 

Garage Conversion


£8,000 – £15,000


£10,000 – £20,000


Factors Affecting Price

  • Materials: brick vs cladding, windows, flooring
  • Labour & timeframe
  • Planning permissions & structural requirements
  • Location: London premiums vs Southend

Why Citadel Construction?

  • Fixed, transparent pricing
  • Local expertise in Southend & London
  • Full project management
  • High-quality materials & certified trades

Get a Free Quote

Call 07814387854

Get Started

Contact Us

Ready to get started on your next project? Contact us today to schedule a consultation and learn more about our services. We look forward to working with you!


Copyright © 2025 Citadel Construction  - All Rights Reserved.

Powered by

  • Privacy Policy

This website uses cookies.

We use cookies to analyze website traffic and optimize your website experience. By accepting our use of cookies, your data will be aggregated with all other user data.

DeclineAccept