By continuing to use the site you agree to our Privacy & Cookies policy

Your browser seems to have cookies disabled. For the best experience of this website, please enable cookies in your browser.


Your browser is no longer supported

For the best possible experience using our website we recommend you upgrade to a newer version or another browser.



Costs based on final account SUBSTRUCTURE Foundations/slabs £294/m 2Concrete slab on mini-piles; hardcore and insulation SUPERSTRUCTURE Frame £3/m 2Steel columns and PFCs with bolted connections, as canopy Roof terrace £309/m 2Timber decking on warm deck covering on timber joists Rooflights £12/m 2Flushglaze dg rooflights Staircases £25/m 2Refurbishment of existing stair External walls £2/m 2Making good existing Windows £136/m 2Timber-framed dg triangular ...


for less than 46p a day

Join thousands of professionals who already subscribe to the Architects' Journal.
You’ll get instant access to read this article -
and 53,000+ articles like it.

  • Trusted industry news & analysis, wherever you need itUnlimited online access and weekly magazine delivery – now also available on iPad/iPhone
  • Get ideas, get inside buildings and check precedentsBuildings Library – images, drawings and plans for exemplar projects in British architecture
  • Planning & regulation – what you need to know Protect your practice - the AJ keeps you up-to-date with changes to regulations and legislation
The searchable digital buildings archive with drawings from more than 1,500 projects

AJ newsletters