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House Extension Cost London and Hertfordshire United Kingdom

Updated: Nov 23

Wondering what will your house extension project cost? We have 3D view of how the house extension might look like and costs associated. You will gain the understanding of different types of design and build construction projects in 3D view. You will gain understanding of different types of house extensions projects such as rear house extensions, kitchen extensions, side return extensions, wraparound extensions and loft conversions and house extensions project as a whole.


House Extension Cost London and Hertfordshire
House Extension Cost London and Hertfordshire

For instant cost on various types of house extension projects including rear house extensions, kitchen extensions, side return extensions, wrap around house extensions or loft and house extensions instant cost calculator



Rear House Extension or Kitchen Extension
Rear House Extension or Kitchen Extension

Design and Build rear house extension or kitchen extension at rear of the property.


Estimated cost: from - £49,000.00


Optional Extras:

  • Skylight or small lantern

  • Bi-fold doors

  • Kitchen

  • Floor finishing

  • Patio at rear of the property

  • Downstairs Bathroom

  • Open plan 2 to 7 meters




Small Side Extension Pitched Roof
Small Side Extension Pitched Roof

Design and Build Small Side Extension Pitched Roof.


Estimated cost: from - £48,000.00


Optional Extras:

  • 2 x Velux

  • Bi-fold doors

  • Kitchen

  • Floor finishing

  • Patio at rear of the property

  • Downstairs Bathroom

  • Open plan 2 to 7 meters





Small Side Extension Pitched Roof
Small Side Extension Pitched Roof

Design and Build Small Side Extension Pitched Roof.


Estimated cost: from - £49,500.00


Optional Extras:

  • Skylight or small lantern

  • Bi-fold doors

  • Kitchen

  • Floor finishing

  • Patio at rear of the property

  • Downstairs Bathroom

  • Open plan 2 to 7 meters





Small Rear Extension Flat Roof
Small Rear Extension Flat Roof

Design and Build Small Rear Extension Flat Roof.


Estimated cost: from - £48,000.00


Optional Extras:

  • Skylight or small lantern

  • Windows

  • Bi-fold doors

  • Kitchen

  • Floor finishing

  • Patio at rear of the property

  • Downstairs Bathroom

  • Open plan 2 to 7 meters




Medium Side Extension Pitched Roof
Medium Side Extension Pitched Roof

Design and Build Medium Side Extension Pitched Roof.


Estimated cost: from - £55,500.00


Optional Extras:

  • 3 x Velux

  • Bi-fold doors

  • Kitchen

  • Floor finishing

  • Patio at rear of the property

  • Downstairs Bathroom

  • Open plan 2 to 7 meters




Medium Side Extension Flat Roof
Medium Side Extension Flat Roof

Design and Build Medium Side Extension Flat Roof.


Estimated cost: from - £54,000.00


Optional Extras:

  • Skylight or medium lantern

  • Bi-fold doors

  • Kitchen

  • Floor finishing

  • Patio at rear of the property

  • Downstairs Bathroom

  • Open plan 2 to 7 meters





Large Side Extension Flat or Pitched Roof
Large Side Extension Flat or Pitched Roof

Design and Build Large Side Extension Flat or Pitched Roof.


Estimated cost: from - £68,000.00


Optional Extras:

  • 3 x Skylights on flat roof or 4 x Velux on Pitched Roof

  • Bi-fold doors

  • Kitchen

  • Floor finishing

  • Patio at rear of the property

  • Downstairs Bathroom

  • Open plan 2 to 7 meters




3 meter rear house extension with flat roof at rear of the property
3 meter rear house extension with flat roof at rear of the property

Design and Build Terraced 3 meter rear house extension with flat roof at rear of the property.


Estimated cost: from - £47,800.00


Optional Extras:

  • Skylight or small lantern

  • Bi-fold doors

  • Kitchen

  • Floor finishing

  • Patio at rear of the property

  • Downstairs Bathroom





3 Meters Crown Roof Rear Extension
3 Meters Crown Roof Rear Extension

Design and Build Terraced 3 meter rear house extension with crown roof.


Estimated cost: from - £59,500.00


Optional Extras:

  • 4 x Velux

  • Bi-fold doors

  • Kitchen

  • Floor finishing

  • Patio at rear of the property

  • Downstairs Bathroom






Flat Roof Small Wrap a Round Extension
Flat Roof Small Wrap a Round Extension

Design and Build Flat Roof Small Wrap a Round Extension.


Estimated cost: from - £64,000.00


Optional Extras:

  • 1 x Skylights or Lantern on flat roof

  • Bi-fold doors

  • Kitchen

  • Floor finishing

  • Patio at rear of the property

  • Downstairs Bathroom






Pitched Hip Roof Small Wrap a Round Extension
Pitched Hip Roof Small Wrap a Round Extension

Design and Build Pitched Hip Roof Small Wrap a Round Extension.


Estimated cost: from - £61,000.00


Optional Extras:

  • 2 x Velux Windows

  • Bi-fold doors

  • Kitchen

  • Floor finishing

  • Patio at rear of the property

  • Downstairs Bathroom






What is the cost of the loft conversion and house extension?

You can use our "instant quote calculator" and find out the cost in seconds! for both design and build, architecture services or just construction services depend what stage you are in and what you have so far completed.


We have experience of over 15 years in design and construction of loft conversions and home extensions in London and Hertfordshire areas and have worked out a unique calculation formula that you can find out to what your house extension and loft conversion will cost in seconds.


How can Lccl Construction be of help?


Do you require a loft conversion and house extension to add extra space?

Do you require architecture design and construction services?

Then look no further get in touch with us for a detailed free no obligation quote. We can accommodate a very quick turnaround. Our loft conversions and house extensions come with 10 year guarantee and 12 month workmanship guarantee.


Use our instant quote calculator for a quote about your project whether construction only or design and build.


Use our Free consultation call booking system to schedule a call at the time and date that suits you best.

LCCL Construction

Telephone: 020 8037 7332

Email: info@lcclconstruction.co.uk

Web: https://www.lcclconstruction.co.uk

Free consultation call: https://www.lcclconstruction.co.uk/book-online

Instant quote online: https://www.lcclconstruction.co.uk/instant-quote

How does it work? https://www.lcclconstruction.co.uk/how-does-it-work


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