How much does a two-storey                               extension cost?



Basic Spec: £1,320 to £1620/m²


Medium Spec: £1,700 to £2,000/m²


High Spec: £1,800 to £2,500/m² or more.



How much does a single-storey extension cost?


Basic Spec: £1,000 to £1,680/m²


Medium Spec: £1,680 to £1,920/m²


High Spec: £1,920 to £2,160/m² or more.





Generation Building Services   Range of Renovation and Building Services


Generation Building Services serving clients in London and surrounding areas providing highest standard renovation and building services for domestic and commercial projects.


We  offer a complete property  refurbishment service. We often play the role of a main contractor,  generally taking full responsibility to ensure you get the result you're looking for.

Our range of renovation and refurbishment services includes:


 Windows and door Supply and installations                                         Full house refurbishment and new Build                                               Loft conversion

 Room Extension




 Boiler installation, gas safety inspection

 Electrical installations





Certification, maintenance and servicing

Commercial  Building works

Carpentry and Joinery

Kitchen and bathroom fitting

Rendering and Plastering

Electrical and plumbing works


Structural building

Internal and external painting and decorating

If you have a property renovation or refurbishment project you wish to discuss,  please call us on 07515382573 or email

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