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Lancashire Window

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House Extensions in Lancashire

Expand your living space without moving house. Lancashire Window designs and builds high-quality home extensions across Burnley, Blackburn, and the surrounding areas — creating beautiful spaces that add real value to your property.

Get a Free Quote Today

Expand Without Moving

Create the extra space you need without the cost and stress of moving home.

Fully Project Managed

We handle design, planning, groundworks, build, and finishing.

Adds Significant Value

A quality extension typically adds more value than it costs to build.

Fully Compliant

All planning applications and building regulations handled for you.

Create the Space You've Always Wanted

A house extension is one of the most rewarding home improvements you can make. Whether you need an extra bedroom, a larger kitchen, a home office, or a playroom, extending your home can deliver the space you need at a fraction of the cost of moving. And unlike moving, you stay in the home and neighbourhood you love.

Lancashire Window manages the entire extension process from initial design through to completion — including planning applications, groundworks, structural construction, windows and doors, roofing, plastering, and finishing. Our experienced team has completed dozens of extensions across Burnley, Blackburn, and Lancashire, and we’re proud of every one.

  • ✓Single storey rear extensions — most popular and versatile option
  • ✓Double storey extensions — maximum additional space
  • ✓Side extensions — make use of unused side space
  • ✓Wrap-around extensions — maximise multiple aspects
  • ✓Loft conversions — convert unused attic space into a bedroom or office
Request a Free Quote
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Your Extension, From Start to Finish

We manage every aspect of your extension project — you just enjoy the result.

100%
Project Managed
Full
Planning Support
Free
Design Visit

Extension Types We Build

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Single Storey Rear

Extend your kitchen, living room, or add a new room at the back

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Double Storey

Maximum additional space across two floors

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Side Extension

Utilise unused side garden space for extra rooms

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Wrap-Around

Combine rear and side extensions for a dramatic transformation

Frequently Asked Questions

Many single storey rear extensions fall within permitted development rights and do not require a full planning application. However, size, location, and other factors affect this. We’ll advise during your free design consultation and manage all necessary applications.
Timescales vary depending on size and specification, but a typical single storey rear extension takes 8–16 weeks from start of construction to completion. We’ll give you a detailed programme during your design consultation.
Extension costs vary significantly depending on size, specification, and location. We provide detailed, itemised quotes following your free design consultation. We pride ourselves on transparent, competitive pricing with no hidden extras.
Yes — Lancashire Window builds house extensions throughout Burnley, Blackburn, and the whole of Lancashire. Contact us today for a free design consultation.

Book Your Free Extension Design Consultation

Contact Lancashire Window today and let’s discuss your extension project. We’ll visit your home, discuss your requirements, and provide a detailed, competitive quote.