Building an Extension in London? Thinking Where to Start?
After
consultation with your local architect, they will draw up plans for submission
to the planning department of your local council. Architects can negotiate on your behalf with the council
if required, and will keep you regularly informed of progress. Applying for
planning permission can be a slow process, especially if there are any
objections.
Usually it takes 6-8 weeks to get planning permission
At this
stage an initial fee will be require to cover costs, starting at around £750
for a small extension. Local designers should fully explain beforehand what
services are required, and what is included in their professional fees.
Once
planning permission has been obtained, architect will then submit detailed
technical plans required for the building control authority’s approval. At this
stage a second payment will be required, again starting at around £750.
When the
plans are approved, local London builders will provide you with detailed quotes, with a view to signing a
contract.
* Please note that builder estimates can be revised
until you have agreed a written quote. They can give you a fixed quote for your
extension, providing that all work is detailed, post-planning architectural
drawings have been produced, and our builder has visited the property to
discuss your requirements and carry out a survey of the site conditions. The
contract must be signed by both parties before any work commences. The fixed
quote from building contractor will
form part of this contract.
House Extension Prices
The cost of
a London Home Extension will vary
greatly depending on the type of property you own and your requirements. While
there is no precise formula for obtaining an accurate cost for your extension ,
builders have worked out an indicative price guide for building extensions in
London.
A typical
ground floor extension may cost around £30,000 - £60,000.
The price
will vary depending on several factors such as location of the house; ground
conditions; quality of finishing; electrical and plumbing work; kitchen and
bathroom fittings, and the type of extension required.
One-storey
extensions are more common, however two-storey extensions can create additional
space without going into the loft. Adding a two-storey 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 a rough idea of the cost.
The most
common size of extension is 15 to 25 square meters, which can have construction
costs between £20,000 and £35,000 (excluding the interior fitting). The cost
for interior fitting can range from £10,000 to £20,000 for a small
single-storey extension.
Approximate Home 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
|
Fixtures & Fittings
(electrical, plumbing, plastering, flooring)
|
£400 per m2
|
Decoration Finishing
|
£10-15 per m2
|
The given
costs will vary depending on your design preferences, as well as availability
of contractors and materials.
It is
always advisable to add between 10% and 15% on top of the estimated cost, to
allow for any unexpected price fluctuations.
Estimating Building Costs – New Builds
It tends to
be much less expensive to build your dream home from scratch than to buy a
pre-built home. The price per square meter in the UK ranges from around £550 to
£1,500, which means that the average cost to build a 100m2 house is only £77,500,
excluding excavation, walkways, driveways and furnishing.
Alternatively,
if you have the space, adding a conservatory is a cost-effective way of getting
additional living space from around £10,000 – £15,000
Author:
Simply London Builders - West London Construction Company specialises in a complete range of superb Home Extensions in London known for completing projects
on-time and on-budget, combining great value-for-money with a high standard of
quality.
