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House Extension in city

House extension features a vast array of advantages that makes it easy to see why the extension could be a excellent uptick in the possible price of your residential or commercial property in terms of sales. So if you're looking to develop a new house extension however still not convinced concerning the project, we're below to help you. Being fully conscious any type of home building and construction work is normally a heavy investment, there's a significant demand to be set on your choice prior to setting up the beginning of any kind of work. So are house extensions worth it? Below are a few of the top advantages offered by house extensions to assist you make a decision if it's the most ideal route for you.

 

What's Involved in Adding an Extension?

The steps will certainly vary relying on the range of your extension, however you can anticipate some, if not all, of the below to be included when adding an expansion to your residence:

 

  1. Obtaining Building Regulations or Planning Permission (if required as the extension is larger than permitted development).
  2. Checking your leasehold contract (if relevant) to make sure you can do what you want to do.
  3. Getting an architect  to prepare the plans, considering your planned use ( cooking area, shower room, research study).
  4. Hiring a competent builder with experience of larger projects.
  5. Calling your insurance policy provider to allow them understand of the planned job ahead of it beginning.
  6. Obtaining auto parking allows if needed for your professionals to ensure they have simple access to your property.
  7. Making sure all intended work falls within permitted allowables.
  8. Clearing up the space and also excavating if needed, including the elimination of trees.
  9. Structure job can start.

 

What is the expense of a house extension in city?

If you're considering adding a two floor house extension, after that establishing a budget for this job would certainly be a wonderful method to start. Comparable to a back extension, a two storey extension typically leaves the rest of the structure needing some job and also, due to its dimension, this may imply the re-development of the entire house - which is why they can be really costly. A few of the various other influencing variables that can have large influence on a 2 floor house extension price includes: your area, the dimension of the build, intricacy of the layout (anything beyond the common develop will typically require even more knowledge and also time), the glazing to be incorporated (the much more the glass used in the project, the extra the product cost), along with the group used.

Average House extensions cost in Carshalton

The regular cost of House extensions are £53,000 in Carshalton. Costs vary based upon the materials and the company picked. The upper price range can be as high as £75,600. The material costs are in most cases around£10,500.

Average price per House extensions job in 2025

Avg. price low

Avg. price low
£32,400

Avg. price

Avg. price
£53,000

Avg. price high

Avg. price high
£75,600

£76100

£57075

£38050

£19025

£0

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

House extensions installation cost in Carshalton 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 Carshalton in March 2025

2,979

Requests for quotations in Carshalton in March 2025

15

Requests for House extensions quotations in Carshalton in March 2025. -21% change from February 2025.

180

Requests for House extensions quotations in Surrey in March 2025. -25% change from February 2025.

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

House extensions searches in cities and towns near Carshalton March 2025

32

Requests for quotations in Morden in March 2025

15

Requests for quotations in Carshalton in March 2025

10

Requests for quotations in Banstead in March 2025

10

Requests for quotations in Sutton in March 2025

0

Requests for quotations in Wallington in March 2025

Carshalton

Carshalton is a suburban area inside the London Borough of Sutton and it's situated near the River Wandle. Five wards make up the Carshalton region, providing a overall population to 45,525 and the region is positioned towards the southwest of Greater London. For all property developments you're thinking about, make certain to compare and contrast quotations between vetted businesses in the area and get the right price for your next project.

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House extensions pros in Carshalton

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...

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

Similar Customer Enquiries for House extensions in Carshalton

09 Aug

House Extensions

Carshalton - SM5

Enquiry from: Rohit T

Start Date: Immediate

house extension side and rear, l shape extension - side 8m by 2.3m rear 4m by 7.8m with internal finish with plasterboard. property type: semi detached looking for: single storey extension do you hav...

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25 Feb

House Extensions

Carshalton - SM5

Enquiry from: Laura E

Start Date: Immediate

Small ground floor extension to our kitchen / living space to include small utility room and toilet. Appox. 3x2m. Loft extension to include one bedroom and bathroom. The property is a semi-detached ...

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25 Feb

House Extensions

Carshalton - SM5

Enquiry from: Laura E

Start Date: Immediate

Small ground floor extension to our kitchen / living space to include small utility room and toilet. Loft extension to include one bedroom and bathroom. The property is a semi-detached house. We wo...

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10 Apr

House Extensions

Carshalton - SM5

Enquiry from: Kevin J

Start Date: Immediate

double side extension, single rear extension.

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20 Feb

House Extensions

Carshalton - SM5

Enquiry from: Praba T

Start Date: Immediate

kitchen extesion

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29 Jan

House Extensions

Carshalton - SM5

Enquiry from: Gianluca U

Start Date: Immediate

I need to extend my kitchen at rear of my property measure are 5 x3 more or less

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25 Jan

House Extensions

Carshalton - SM5

Enquiry from: Pravin S

Start Date: Less than one month

*Homeowner House extension Supplied and fitted Please call to appoint

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22 Jan

House Extensions

Carshalton - SM5

Enquiry from: Pravin S

Start Date: Less than one month

*Homeowner House extension Supplied and fitted Please call to appoint

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20 Jan

House Extensions

Carshalton - SM5

Enquiry from: Pravin S

Start Date: Less than one month

Property Type: Terrace Have you got a rough idea of the design you would like: Some Ideas How many bedrooms are you looking to have: 1-2 Bedrooms How many storeys are you looking for the property to h...

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08 Dec

House Extensions

Carshalton - SM5

Enquiry from: Sab M

Start Date: Immediate

Customer visited the myhouseextension.co.uk site and submitted an enquiry. Property type: Terrace, Work description: single story back extension Are you the property owner: Owner of the propert...

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29 Aug

House Extensions

Carshalton - SM5

Enquiry from: Ehsan R

Start Date: Immediate

Submit your free quote for rated tradespeople

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17 Jul

House Extensions

Carshalton - SM5

Enquiry from: G S

Start Date: Immediate

Homeowner 4m x 4m extension Plans and planning permission available Please contact to appoint *

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06 Jul

House Extensions

Carshalton - SM5

Enquiry from: Ade O

Start Date: Immediate

Customer visited the myhouseextension.co.uk site and submitted an enquiry. Property type: Terrace, Work description: rear extension/lean to style with slate roof to cover the width of the house . w...

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12 Dec

House Extensions

Carshalton - SM5

Enquiry from: J-Dominique S

Start Date: Immediate

Further extend an existing side house extension and join up with kitchen. Current existing side extension is 2.9m long x 1.5 wide. Another 5m extension along the house to permit an extension of the c...

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16 Oct

House Extensions

Carshalton - SM5

Enquiry from: R

Start Date: Immediate

Moving house. New house has single garage - would like to convert garage and also have extension across the top

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02 Sep

House Extensions

Carshalton - SM5

Enquiry from: Pete B

Start Date: Immediate

I'm looking at converting my garage, loft conversion and a modern single storey extension to the rear which will create a large kitchen diner area

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04 Jul

House Extensions

Carshalton - SM5

Enquiry from: Martina C

Start Date: Immediate

Home owner Single story extension - extend kitchen approx 4x4m. It will have plain walls except for one side which will have folding doors. I would like a sloping roof with skylight/velux. We have dr...

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22 Jun

House Extensions

Carshalton - SM5

Enquiry from: Waidi A

Start Date: 3+ months

Single Storey rear extension, spanning 3.5metres by 8m. Flat roof fiberglass warm roof, total height of extension is 2.9metres. Includes creating 2 wall openings which will require steel beams. In...

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02 May

House Extensions

Carshalton - SM5

Enquiry from: Paul W

Start Date: Immediate

I am interested in extending this existing extensions Are you the property owner: Owner of the property Property Type: Semi detached Looking For: Single storey extension Do you have planning permissio...

Post a similar request >

13 Apr

House Extensions

Carshalton - SM5

Enquiry from: Martina C

Start Date: Immediate

An extra living space off the kitchen approx 4x4m. It will have plain walls except for one side which will have folding doors. I would like a sloping roof with skylight/velux. We have dry air centr...

Post a similar request >

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FAQs

how to finance a house extension?

Do you want to beautify and increase the value of your home? If yes, a refurb and house extension is definitely a great option to consider. Depending on your home extension project, the value that’ll be added to your home’s resale value varies. However, the cost of completing a house extension project can be huge, so you just might want to consider your financing options. Fortunately, there are various options through which your house extension project can be funded with each having its own pros and cons. Your specific circumstances will determine the one that’s going to work best for you, so let’s take a look at some of the best options to help you fund your project.

• Home Remortgaging

The process whereby a mortgage is transferred from one provider to the other is known as remortgaging. This is usually done to generate funds for a project by entering a more lengthy repayment term commitment when switching. If you want to raise your funds in a quick manner, this process works best.

• Savings

This is a good reason to cultivate a good saving habits. If you’ve been able to save up some mega bucks then you’d probably won’t have to borrow money to finance your house extension.

• Unsecured Loans

If you do not buy into the idea of borrowing more against your property, you may just be able to apply for an unsecured loan especially if you have a good credit record. A secured loan makes use of collaterals like a car or house to serve as a cover for the lender, meanwhile an unsecured loan is based mainly on the credit managing history of the borrower.

• Credit Card

There are some great benefits that comes with financing your small or medium scale extension project with your credit card. Not only does it offer some real lifeline if problems arise during the project, but you can also avoid paying excessive interest on the investment by ensuring your deal has a 0% introductory rate.

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.

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 big can my house extension be?

The holy grail of home extensions is basically the need for additional space for living as well as leisure. However, before commencing your home extension project, you’d probably want to know just how big your new building can be. In this article, you’ll find the answer to this question which is also frequently asked by many other home or property owners in the UK.

Besides your budget, there are two other major influencing factors that can determine just how much extra room that can be added. These factors include whether you wish to carry out the extension project under Permitted Development rights which is usually for a smaller project or you’d prefer to opt for a larger project which is covered by Planning Permission.

Apart from the limitations in the size of an extension under Permitted Development, the extensions are also a lot more affordable and consumes less time when compared to the extensions under planning permission. So what exactly is the size limit for an extension under Permitted Development and the ones under Planning Permission?

For a single storey extension, the maximum size that can be constructed without having to submit an application for Planning Permission includes:

• An extension should have a maximum length of 6m, if you reside in a terraced home or a semi-detached property.

• Extensions for detached properties can have a maximum length of 8m.

• The extension built must not go beyond half your garden’s area.

• The extension should have a maximum height of 4 metres, but in the event whereby the extension is situated within 2 metres of the boundary of your property, it should not exceed a height of 3 metres.

• The extension should not be higher than the highest part of the existing house’s roof.

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