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House Extension in city

House extension comes with a wide range of benefits that makes it easy to see why the extension could be a wonderful uptick in the prospective rate of your residential or commercial property in regards to sales. So if you're seeking to build a brand-new residence extension yet still not persuaded regarding the job, we're here to help you. Being totally aware any type of home construction work is typically a heavy financial investment, there's a substantial demand to be set on your decision prior to scheduling the commencement of any type of job. So are house extensions worth it? Below are some of the leading benefits offered by house extensions to aid you determine if it's the most appropriate path for you.

 

What's Involved in Adding an Extension?

The steps will vary relying on the extent of your extension, yet you can expect some, if not all, of the below to be entailed when adding an extension to your home:

 

  1. Acquiring Building Regulations or Planning Permission (if needed as the extension is larger than permitted development).
  2. Examining your leasehold contract (if applicable) to make certain you can do what you intend to do.
  3. Getting an architect  to draw the plans, considering your expected usage ( kitchen area, shower room, office).
  4. Hiring a competent builder with experience of larger projects.
  5. Calling your insurance provider to let them know of the prepared job ahead of it beginning.
  6. Acquiring parking allows if required for your service providers to ensure they have very easy accessibility to your property.
  7. Making certain all planned job drops within allowed allowables.
  8. Clearing up the area and excavating if required, including the removal of trees.
  9. Structure job can begin.

 

What is the cost of a house extension in city?

If you're taking into consideration adding a 2 storey house extension, then establishing a allocate this project would be a wonderful method to get going. Comparable to a rear extension, a two storey extension typically leaves the remainder of the structure requiring some job and also, because of its size, this may suggest the re-development of the whole house - which is why they can be extremely costly. Several of the various other affecting factors that can have huge impact on a two storey house extension cost consists of: your place, the dimension of the construct, intricacy of the design (anything past the typical construct will typically require even more knowledge and also time), the glazing to be incorporated (the extra the glass utilized in the task, the a lot more the material price), along with the group made use of.

Average House extensions cost in Hammersmith and Fulham

The regular cost of House extensions are £65,000 in Hammersmith and Fulham. Costs vary based upon the materials and the company picked. The upper price range can be as high as £96,334. The material costs are in most cases around£10,500.

Average price per House extensions job in 2025

Avg. price low

Avg. price low
£35,334

Avg. price

Avg. price
£65,000

Avg. price high

Avg. price high
£96,334

£96900

£72675

£48450

£24225

£0

Prices based on actual House extensions costs for Hammersmith and Fulham, as reported by local LeadsDoWork members.

House extensions installation cost in Hammersmith and Fulham 2025

Labour cost £27,000
Material cost £10,500
Waste removal £2,500
Time frame: 10-14 weeks

House extensions searches in April 2025

House extensions Projects in Hammersmith and Fulham in March 2025

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Requests for quotations in Hammersmith and Fulham in March 2025

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Requests for House extensions quotations in Hammersmith and Fulham in March 2025. 0% change from February 2025.

1,000

Requests for House extensions quotations in London County in March 2025. 14% change from February 2025.

Source: Numbers calculated based on the search volumes in major search engines

House extensions searches in cities and towns near Hammersmith and Fulham March 2025

27

Requests for quotations in Westminster in March 2025

Hammersmith and Fulham

The London Borough of Hammersmith and Fulham is a London borough in West London, and forms part of Inner London. The borough was formed in 1965 by merging the Metropolitan Borough of Hammersmith along with the Metropolitan Borough of Fulham. It was generally known as the 'London Borough of Hammersmith' until its name was changed on 1 January 1979 by the borough council. The two had been joined together previously as the Fulham District from 1855 to 1886. The borough covers a total area of 6.33 square miles.

In line with population estimates in the middle of 2014, it features a permanent population of around 178365 people. Within this population, around 50 per cent of households are owner-occupiers. Passed through by the east-west main roads of the A4 Great West Road and the A40 Westway, a lot of international corporations have offices inside the borough.

Hammersmith and Fulham is served by a number of London Overground and London Underground stations. The borough is unique in London in housing three professional football clubs: Chelsea, Fulham and Queens Park Rangers. Hammersmith and Fulham consists of 4 theatres and the Lyric Hammersmith, on Lyric Square off King Street, is deemed as one of the most notable theatres outside the West End in London.

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House extensions pros in Hammersmith and Fulham

Dream the Build

19 review(s)
Based: in London, EC1V 2NX

DREAM the Build. Ltd ' Constructing your Vision Making home development exciting, fun and asset building experience , future proofing household & investors Who we are ? Starting fresh in a new country is never easy, but what we did Catal...

Latest review

Patricia Z., SE21
5

House Extensions in London

Great consultation by Catalin Spent a lot of time with us understanding the project and various options.

Nicholas James Construction

7 review(s)
Based: in Bromley, BR1 3AX

From past fifteen years we have been established as the finest building and construction service provider to clients in Bromley and its surrounding areas.

Latest review

Jagdish K., HA3
5

House Extensions in Harrow

Absolutely pleasant appointment. Very patient and polite, listened carefully to detail and more of my background and his...

Tectra Partnership Ltd

1 review(s)
Based: in Slough, SL3 0JE

Latest review

Deepak S., KT10
5

House Extensions in Esher

excellent communication

JPA Building Construction LTD

1 review(s)
Based: in Twickenham , TW1 1AG

Latest review

Rosa S., SE20
5

House Extensions in London

Very nice and helpful unfortunately I am looking for a builder who lives nearby my property

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London - W6

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FAQs

how much value does an extension add to your house?

Are you interested in extending your home to create more living space? If yes, then you’d probably want to know how much value it can add to your property in order to compare the building costs to the potential value gain. Well, as long as you know what you’re doing, your house doesn’t necessarily have to be a money pit. So what are your options when talking about home extensions and what’s the associated value to be gained?

• Bathroom Extensions

Although you should have it in mind that bathroom extensions isn’t usually that cheap, but once done, it can increase the value of a standard UK house within the range of £12,000 to £15,000. Meanwhile the finishing cost of a bathroom can range from £2,500 to £7,000.

• Single or Double Storey Extensions

Single storey extensions are always huge when it comes to increasing the value of your home - giving about 4 to 7 percent increase. If it goes that far, then literally nothing beats a full spectrum, double storey extension which can give up to 11 percent increase in the value of a property - equalling about a whooping £33,000 for a standard home in the UK.

• Conservatory Extension

With conservatories becoming more and more popular in the UK due to the weather conditions, several buyers are now including it’s availability as part of the criteria for purchasing a house. Wonder why? This is simply because everyone wants to enjoy their garden all throughout the year. As a result of this high demand, adding this type of extension to your house can go a long way to increase it’s value. However, it’s very important to incorporate high quality materials during construction. With glass conservatories offering, on the average, up to £5,000 increase in value, the cheaper PVC alternative offers much less value and can also deter potential buyers.

how much is a double house extension?

A double house extension is basically a construction to any aspect of your house that elevates up to offer two floors of space. It can be structured to suit your existing home in two storeys or as a side wing on a taller property. If you’re considering building a double house extension, then estimating the cost is a very important task to do before commencing the project. In this article, we’ll give you an idea of the cost of a double house extension so you can estimate yours accordingly.

The double house extension cost depends on several factors that’s specific to your home as well as your design choice. These includes:

• Location of your property. Places like London and the southeast will generally cost more than the other regions due to higher demands.

• Accessibility of the site. The ease of your site’s accessibility also plays a key role in the price.

• Size of the extension. The more the extension’s size in footprint and square metres, the higher the possible costs.

• Materials used in making the roof as well as the complexity of the roof design.

• Your choice of finishing. These includes flooring window and door frames, glazing, underfloor heating and roof lights.

• Your property’s soil type. Different types of soil requires varying treatments as well as materials to develop solid foundations.

Constructing a double house extension is a quite simple build in terms of technicality when its to the side or rear of your house as this can also help you save some money. Generally, considerably expanding your home’s space by building a double house extension will cost within the range of £1,500 per m2 to about £2,800 per m2.

when do you need planning permission for a house extension?

If you’re planning on adding a house extension to your property, you’d probably be worried about whether or not your proposed extension would require a planing permission. Well, it may be relieving to know that not every house extension project would require a formal consent, and in fact, several extensions are covered by the permitted development rights. Not only can this save you a considerable amount of time especially at the project’s planning phase, but it’ll also save you money on the application fee. In the UK, single storey extensions to the house’s rear can be 3 metres deep for both semi detached houses and terraces or 8 metres deep for detached homes.

So how do you know when you’d require a planning permission for your home extension? Well, if your extension plan fits these criteria explained below, then your project is most likely going to be allowable as a permitted development.

• Extensions, which includes previous additions, must not go beyond half of the original house’s total surrounding land area.

• The main elevation, or side elevation where it fronts the highway, must not be extended forward.

• For single storeys, the rear additions must not extend more than the original house’s rear by more than 3 metres in both semi attached homes and terraces (4 metres for detached houses).

• Extensions to the side must be a single storey with a height not exceeding 4 metres and not going beyond 50% of the original house’s width.

• Extensions hat within 2 metres of a boundary should have a eaves height not more than 3 metres.

• Multi storey addition must not extend beyond the original house’s rear wall by a maximum of 3 metres or 7 metres of the boundary opposite the rear wall.

• Permitted development rights do not apply in listed buildings or designated areas.

how long do house extensions take?

If you’re about to start your house extension project and wondering how long it’ll take to complete, you’re not alone! This is one of the most common questions that’s asked by homeowners in the UK and across the globe. However, there’s no single precise answer for this as there are multiple factors that’ll affect the length of time it’ll take to complete your home extension. These factors include the size of the construction work as well as whether you’re planning to live in the house after completion or otherwise.

For a single extension, the length of time it’ll take to complete the home extension is normally up to 3 months. So let’s break this down:

As you would have expected, the first step to be taken is the preparation of the site. You start by digging out the footing and preparing the foundation which should take about 2 weeks. This is then followed by the damp course installation as well as the fitting of any drains needed around the extension which will also take a further 2 weeks.

The 5th week will be for the construction of the external walls as well as putting the blockwork in place for the provision of the cavity wall insulation. A further 2 weeks after this, will be dedicated to the installation of the roof structure and the internal walls.

It’s at this junction that you’ll call on your weather proof installer to fit in your uPVC windows and doors. Once done, the gas fitters and electricians will have to be on site to connect power to your new extension building. Subsequently, this will be followed by internal wall plastering as well as breaking through your main house. Once the plaster is dried, decorations completed and all the required furniture and units installed, the extension is ready for use.

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