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House Extension in city

House extension comes with a large range of advantages which makes it very easy to see why the extension could be a fantastic uptick in the potential cost of your building in regards to sales. So if you're looking to build a brand-new residence extension however still not convinced concerning the job, we're right here to assist you. Being totally conscious any home building work is usually a hefty financial investment, there's a massive requirement to be set on your choice prior to setting up the beginning of any type of work. So are house extensions worth it? Below are several of the top benefits used by house extensions to aid you choose if it's the most suitable route for you.

 

What's Associated with Building an Extension?

The actions will vary relying on the range of your extension, but you can anticipate some, if not all, of the below to be entailed when including an extension to your home:

 

  1. Obtaining Building Regulations or Planning Permission (if needed as the extension is larger than permitted development).
  2. Inspecting your leasehold arrangement (if suitable) to make sure you can do what you want to do.
  3. Hiring an architect  to prepare the plans, considering your intended use (kitchen, restroom, office).
  4. Hiring a competent builder with experience of larger projects.
  5. Contacting your insurance policy company to allow them understand of the intended job ahead of it starting.
  6. Obtaining vehicle parking allows if needed for your professionals to ensure they have simple accessibility to your building.
  7. Making sure all prepared work falls within permitted allowables.
  8. Cleaning the area and also excavating if required, including the elimination of trees.
  9. Building work can begin.

 

What is the cost of a house extension in city?

If you're taking into consideration including a two floor house extension, after that setting a budget for this project would be a terrific means to get going. Comparable to a back extension, a two floor extension typically leaves the rest of the building needing some work as well as, due to its size, this might suggest the re-development of the whole house - which is why they can be very pricey. Several of the various other affecting aspects that can have huge influence on a two floor house extension expense consists of: your place, the dimension of the build, intricacy of the design (anything beyond the conventional build will usually call for even more proficiency and also time), the glazing to be integrated (the a lot more the glass used in the project, the much more the material expense), along with the group made use of.

Average House extensions cost in Mitcham

The regular cost of House extensions are £51,667 in Mitcham. Costs vary based upon the materials and the company picked. The upper price range can be as high as £73,000. The material costs are in most cases around£10,500.

Average price per House extensions job in 2026

Avg. price low

Avg. price low
£32,000

Avg. price

Avg. price
£51,667

Avg. price high

Avg. price high
£73,000

£73500

£55125

£36750

£18375

£0

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

House extensions installation cost in Mitcham 2026

Labour cost £27,000
Material cost £10,500
Waste removal £2,500
Time frame: 10-14 weeks
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House extensions on Google in Mitcham

Google searches that showed Local Quotes, 18 July to 15 October 2026

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Searches that showed one of our pages for Mitcham, all services

Source: Google Search Console, the number of times our pages appeared in Google search results. It counts searches that showed the page, not quote requests.

House extensions searches near Mitcham, 18 July to 15 October 2026

2

Searches that showed our page for Purley

Mitcham

Mitcham is the southwest region of London, inside the Borough of Merton and it has a populace of just about 50,000. Nearby areas consist of Wimbledon, Streatham, Tooting and Morden. The region is known due to its great open spaces, including several large ponds. If you're interested in any house improvements within the Mitcham area, ensure to only work with vetted companies in the region to be certain a great price in addition to high quality finish.

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House extensions pros in Mitcham

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 Extension in London

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

Jassi Builders Ltd

2 review(s)
Based: in Hayes, UB4 9YD

Hi Jassi Builders LTD here, I am a specialist in planning, designing and building control services. I make sure that I have completed all my work on perfect time and leave customers in complete satisfaction. We do all types of loft conversions, exten...

Latest review

Julian F., HP2
4

House Extension in Hemel Hempstead

No quote received

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 Extension in Harrow

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

LW Building Service

2 review(s)
Based: in London, SE20 8AG

Latest review

Rosa S., SE20
3

House Extension in London

I have not yet finalised quotation

JPA Building Construction LTD

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

Latest review

Rosa S., SE20
5

House Extension in London

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

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FAQs

Can an extension add value to my home?

Yes. Most extensions will add substantial value to your home, and you may find that the extension adds more value than it cost. However, it’s important to be sure that the home remains balanced. Extending your garage and leaving your property with no parking spaces, for example, may impact your ability to sell.

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.

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.

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