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London Builders & Building Contractors specialising in House Extensions

Building / House Extensions London

House Extensions LondonThe most common alteration work we do is simple extension, supporting upper floors or even entire buildings. Artdom Construction Ltd, Building Contractors in London specialising in House Extensins, have extensive experience in this particular aspect of building work.

If you want to add an extension to your house think about the purpose of your extension. Is it going to be self-contained area for use as a separate home, an extra space for growing family, a commercial use or an investment to increase the value of your property? Draw out some plans and list of your ideas.

Our Royal Institute of British Architects members will draw up plans for submission to the planning department in your local Council. We can negotiate on your behalf with the council and keep you informed on the progress. Applying for planning permission could be a slow process especially if you are refused at first time or there are some objections.

House Extensions LondonAt this stage our fee for architect will start at around £ 750 for a small extension. Our extension designer will explain beforehand what services are required and what is included in their professional fees. Once we obtain planning permission our architect will have to submit detailed technical plans required for the building control authority’s approval. For this stage architect’s fee may be additional £ 750 for small extension.

Finally Artdom Construction will provide you with some quotes and sign the contract.

Please note that our estimate can be revised until you have agreed a written quote for work. We can give you fixed quote for your extension providing that extension is detailed, post-planning architectural drawings have been produced and Artdom Construction’s builder has visited the property to discuss your requirements and has done survey of the site conditions. Contract between the client and Artdom Construction will be signed by both parties before work commences. Fixed quote will form part of this contract.

London House Extension Prices may range between £ 20,000 and £ 70,000 . There is no precise formula for obtaining an accurate cost for your extension (apart from a fixed quote from a builder). We have worked out an indicative price guide for building extension in London.
A typical ground floor extension may bear a cost of around £ 30,000 - £ 50,000.

Please note, that price for home extension will vary depending on several factors: location of the house, ground conditions, quality of finishes: electrical, plumbing work, fitting a kitchen, bathroom and type of extension required.

One-storey extensions are more common, however two-storey extension can create additional space without going into the loft. Adding two storeys extension doesn’t mean that it will cost you twice as much. Just multiply the figure for a single storey by two and deduct 20% to get indication cost.

The most common size of extension is 15 to 25 square meters, which may bear a construction cost between £ 21,000 and £ 33,000 (excluding the interior fitting). The cost for interior fitting ranges from £ 10,000 to 20,000 for a small single storey extension.


General House Extension Costs for London

Planning Costs £ 1,000 - 3,500
Single Storey £ 20,00 – 65,000
Double Storey £ 20,000- 115,000
Shell build cost (windows, external doors, roof etc.)      £ 600 per m2
Fixture&Fittings(electrical, plumbing, plastering, flooring)       £ 400 per m2
Decoration Finishing £ 10-15 per m2

The given costs will be more variable depending on the preferences of the homeowner, for example stone flooring is cheaper than timber.
Materials used for popular glass extension range from self-cleaned glass, fire resistant glass or glass that filters the sun. Flat roofs are cheaper to build than pitched designs. Labour in highly urbanized area is different than rural areas. Additional cost might be added to materials that are imported or higher quality.

Construction cost might fluctuate due to economic conditions and availability of the contractors and materials.
It is always advisable to add from 10% to 15% more on top of the estimated cost to cover for the price fluctuation.


Estimating Building Costs – New Build

On average, building your dream home is considerably cheaper than buying a ready-build home. The price per square meter in the UK ranges from £ 550 to £ 1,500 per m2 which means that the average price of 100 m2 house is £ 77,500 excluding excavation, walkways, driveways and furnishing.

A Conservatory is a cheaper way of getting additional living space at cost around £ 10,000 – 15,000

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