How Much My Home Extension Will Cost

Today I'll tell you how much your home extension will cost will depend on a variety of things like the comparative costs of moving, creating more living space, and the way the costs of these varies and etc.

Again this depends on what is included, building complexity, local conditions, the range of building material costs, whether you want a plain wall envelope, a glulam post & beam structure, or a traditional green oak frame building, and so on.

Things often overlooked by DIY home extenders – whether or not they are doing any of the work themselves – are the costs of architectural design, engineering, preparing and producing the Building Regulation drawings, local authority fees for planning and building regulation submissions, and connection charges for sewage, water, electricity, gas, telephone and so on.

Rule of Thumb’ Building Costs Actually without knowing the detail of site, shape, specification, etc. it is not really possible to comment on these. However:- Rule of Thumb Extension Building Costs are…

Costs of Design & Planning for project £1,500 - £4,000

Other Indicative House Extension Prices per m2 /meter squared

Skeleton Shell with Roof Covering £700 - £850 /meter squared Fixtures & Fittings £500 - £650 /meter squared Internal & External Decoration £10 - £15 /meter squared

… of course, the different internal floor space sizes and types of extension that are being built. However, it takes time and skill to take-off all the different materials and construction elements to be able to calculate the likely cost of your home improvement from these.

“What Price” and others suggest that a basic extension cost might be around £1,000 per m2 (£93 per ft2) for something like a 5m x 4m ground floor extension to give a total area of 20m2. That is to say they suggest this would cost around £20,000.