HOW MUCH DOES AN EXTENSION COST?

To help you with this question we’ve created a simple costing tool. If you use the three drop downs we are able to calculate what extensions are available for you, and at what cost. We can even provide 3D models of how your extension would look. Take a look at see what you could create for your house.

*Please note these are all estimated costs which include plumbing, electrical installation, glazing and external doors, with the applicable VAT

get a quote

Types of
EXTENSIONS?

  • House Type

  • Roof type

  • Extension size

Detached Crown Roof

20m2 Rear Extension.
  • Estimated cost: £42,000
  • et_enqueued_post_fonts: a:2:{s:6:"family";a:1:{s:10:"et-gf-lato";s:75:"Lato:100,100italic,300,300italic,regular,italic,700,700italic,900,900italic";}s:6:"subset";a:2:{i:0;s:5:"latin";i:1;s:9:"latin-ext";}}

Detached Crown Roof

30m2 Rear Extension.
  • Estimated cost: £60,000
  • et_enqueued_post_fonts: a:2:{s:6:"family";a:1:{s:10:"et-gf-lato";s:75:"Lato:100,100italic,300,300italic,regular,italic,700,700italic,900,900italic";}s:6:"subset";a:2:{i:0;s:5:"latin";i:1;s:9:"latin-ext";}}

Detached Flat Roof

30m2 Rear Extension.
  • Estimated cost: £60,000
  • et_enqueued_post_fonts: a:2:{s:6:"family";a:1:{s:10:"et-gf-lato";s:75:"Lato:100,100italic,300,300italic,regular,italic,700,700italic,900,900italic";}s:6:"subset";a:2:{i:0;s:5:"latin";i:1;s:9:"latin-ext";}}

Detached Flat Roof

20m2 Rear Extension.
  • Estimated cost: £42,000
  • et_enqueued_post_fonts: a:2:{s:6:"family";a:1:{s:10:"et-gf-lato";s:75:"Lato:100,100italic,300,300italic,regular,italic,700,700italic,900,900italic";}s:6:"subset";a:2:{i:0;s:5:"latin";i:1;s:9:"latin-ext";}}

Detached Gable Roof

20m2 Rear Extension.
  • Estimated cost: £42,000
  • et_enqueued_post_fonts: a:2:{s:6:"family";a:1:{s:10:"et-gf-lato";s:75:"Lato:100,100italic,300,300italic,regular,italic,700,700italic,900,900italic";}s:6:"subset";a:2:{i:0;s:5:"latin";i:1;s:9:"latin-ext";}}

Detached Pitched Roof

30m2 Rear Extension.
  • Estimated cost: £60,000
  • et_enqueued_post_fonts: a:2:{s:6:"family";a:1:{s:10:"et-gf-lato";s:75:"Lato:100,100italic,300,300italic,regular,italic,700,700italic,900,900italic";}s:6:"subset";a:2:{i:0;s:5:"latin";i:1;s:9:"latin-ext";}}

Detached Pitched Roof

20m2 Rear Extension.
  • Estimated cost: £42,000
  • et_enqueued_post_fonts: a:2:{s:6:"family";a:1:{s:10:"et-gf-lato";s:75:"Lato:100,100italic,300,300italic,regular,italic,700,700italic,900,900italic";}s:6:"subset";a:2:{i:0;s:5:"latin";i:1;s:9:"latin-ext";}}

Semi Detached Crown Roof

30m2 Rear Extension.
  • Estimated cost: £60,000
  • et_enqueued_post_fonts: a:2:{s:6:"family";a:1:{s:10:"et-gf-lato";s:75:"Lato:100,100italic,300,300italic,regular,italic,700,700italic,900,900italic";}s:6:"subset";a:2:{i:0;s:5:"latin";i:1;s:9:"latin-ext";}}

Semi Detached Crown Roof

15m2 Rear Extension.
  • Estimated cost: £30.000

Semi Detached Flat Roof

15m2 Rear Extension.
  • Estimated cost: £30,000
  • et_enqueued_post_fonts: a:2:{s:6:"family";a:1:{s:10:"et-gf-lato";s:75:"Lato:100,100italic,300,300italic,regular,italic,700,700italic,900,900italic";}s:6:"subset";a:2:{i:0;s:5:"latin";i:1;s:9:"latin-ext";}}

Semi Detached Flat Roof

20m2 Rear Extension.
  • Estimated cost: £42,000
  • et_enqueued_post_fonts: a:2:{s:6:"family";a:1:{s:10:"et-gf-lato";s:75:"Lato:100,100italic,300,300italic,regular,italic,700,700italic,900,900italic";}s:6:"subset";a:2:{i:0;s:5:"latin";i:1;s:9:"latin-ext";}}

Semi Detached Flat Roof

30m2 Rear Extension.
  • Estimated cost: £60,000
  • et_enqueued_post_fonts: a:2:{s:6:"family";a:1:{s:10:"et-gf-lato";s:75:"Lato:100,100italic,300,300italic,regular,italic,700,700italic,900,900italic";}s:6:"subset";a:2:{i:0;s:5:"latin";i:1;s:9:"latin-ext";}}

Semi Detached Gable Roof

15m2 Rear Extension.
  • Estimated cost: £30,000
  • et_enqueued_post_fonts: a:2:{s:6:"family";a:1:{s:10:"et-gf-lato";s:75:"Lato:100,100italic,300,300italic,regular,italic,700,700italic,900,900italic";}s:6:"subset";a:2:{i:0;s:5:"latin";i:1;s:9:"latin-ext";}}

Semi Detached Gable Roof

20m2 Rear Extension.
  • Estimated cost: £42,000
  • et_enqueued_post_fonts: a:2:{s:6:"family";a:1:{s:10:"et-gf-lato";s:75:"Lato:100,100italic,300,300italic,regular,italic,700,700italic,900,900italic";}s:6:"subset";a:2:{i:0;s:5:"latin";i:1;s:9:"latin-ext";}}

Semi Detached Pitched Roof

30m2 Rear Extension.
  • Estimated cost: £60,000
  • et_enqueued_post_fonts: a:2:{s:6:"family";a:1:{s:10:"et-gf-lato";s:75:"Lato:100,100italic,300,300italic,regular,italic,700,700italic,900,900italic";}s:6:"subset";a:2:{i:0;s:5:"latin";i:1;s:9:"latin-ext";}}

Semi Detached Pitched Roof

15m2 Rear Extension.
  • Estimated cost: £30.000
  • et_enqueued_post_fonts: a:2:{s:6:"family";a:1:{s:10:"et-gf-lato";s:75:"Lato:100,100italic,300,300italic,regular,italic,700,700italic,900,900italic";}s:6:"subset";a:2:{i:0;s:5:"latin";i:1;s:9:"latin-ext";}}

Semi Detached Pitched Roof

20m2 Rear Extension.
  • Estimated cost: £42,000
  • et_enqueued_post_fonts: a:2:{s:6:"family";a:1:{s:10:"et-gf-lato";s:75:"Lato:100,100italic,300,300italic,regular,italic,700,700italic,900,900italic";}s:6:"subset";a:2:{i:0;s:5:"latin";i:1;s:9:"latin-ext";}}

Terraced Gable Roof

15m2 Rear Extension.
  • Estimated cost: £30,000
  • et_enqueued_post_fonts: a:2:{s:6:"family";a:1:{s:10:"et-gf-lato";s:75:"Lato:100,100italic,300,300italic,regular,italic,700,700italic,900,900italic";}s:6:"subset";a:2:{i:0;s:5:"latin";i:1;s:9:"latin-ext";}}

Terraced Crown Roof

15m2 Rear Extension.
  • Estimated cost: £30,000
  • et_enqueued_post_fonts: a:2:{s:6:"family";a:1:{s:10:"et-gf-lato";s:75:"Lato:100,100italic,300,300italic,regular,italic,700,700italic,900,900italic";}s:6:"subset";a:2:{i:0;s:5:"latin";i:1;s:9:"latin-ext";}}

Terraced Crown Roof

20m2 Rear Extension.
  • Estimated cost: £42,000
  • et_enqueued_post_fonts: a:2:{s:6:"family";a:1:{s:10:"et-gf-lato";s:75:"Lato:100,100italic,300,300italic,regular,italic,700,700italic,900,900italic";}s:6:"subset";a:2:{i:0;s:5:"latin";i:1;s:9:"latin-ext";}}

Why should you get a house extension?

Park Lane Extensions will take responsibility for the entire project and work with you to achieve your vision. Our work has taken us throughout the whole of Northamptonshire, with our team always focusing on making every single storey extension project as simple and as stress-free as possible.

Call us

Contact Us