House Extension in city

Find House Extension Prices in city

Home > Extensions & Conversions Projects > House extensions > London

House Extension in city

House extension comes with a variety of advantages which makes it simple to see why the extension could be a great uptick in the possible cost of your residential or commercial property in terms of sales. So if you're wanting to build a brand-new house extension but still not convinced concerning the job, we're below to aid you. Being completely aware any type of residence building and construction job is typically a heavy financial investment, there's a huge requirement to be set on your decision prior to setting up the beginning of any kind of job. So are house extensions worth it? Below are a few of the leading benefits provided by house extensions to assist you choose if it's one of the most ideal course for you.

 

What's Associated with Adding an Extension?

The actions will vary relying on the range of your extension, but you can anticipate some, otherwise all, of the below to be involved when including an extension to your house:

 

  1. Getting Building Regulations or Planning Permission (if needed as the extension is larger than permitted development).
  2. Inspecting your leasehold arrangement (if appropriate) to see to it you can do what you intend to do.
  3. Hiring an architect  to draw the plans, considering your expected use ( kitchen area, washroom, research study).
  4. Hiring a competent builder with experience of larger projects.
  5. Contacting your insurance carrier to allow them recognize of the intended work ahead of it beginning.
  6. Getting car parking permits if needed for your specialists to ensure they have simple access to your building.
  7. Making certain all intended job drops within permitted allowables.
  8. Cleaning the space as well as excavating if necessary, 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 including a two floor house extension, then establishing a budget for this job would be a excellent means to get going. Similar to a back extension, a 2 floor extension usually leaves the rest of the building requiring some job as well as, as a result of its dimension, this might imply the re-development of the whole house - which is why they can be very costly. Several of the other affecting aspects that can have large influence on a two storey house extension cost consists of: your area, the size of the develop, complexity of the layout (anything past the standard construct will generally need even more experience and also time), the glazing to be incorporated (the much more the glass made use of in the project, the more the product cost), along with the group made use of.

Average House extensions cost in London

The regular cost of House extensions are £62,143 in London. Costs vary based upon the materials and the company picked. The upper price range can be as high as £91,143. The material costs are in most cases around£10,500.

Average price per House extensions job in 2026

Avg. price low

Avg. price low
£34,572

Avg. price

Avg. price
£62,143

Avg. price high

Avg. price high
£91,143

£91700

£68775

£45850

£22925

£0

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

House extensions installation cost in London 2026

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

House extensions searches in June 2026

House extensions Projects in London in May 2026

262,017

Requests for quotations in London in May 2026

720

Requests for House extensions quotations in London in May 2026. -18% change from April 2026.

1,000

Requests for House extensions quotations in London County in May 2026. 14% change from April 2026.

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

House extensions searches in cities and towns near London May 2026

720

Requests for quotations in London in May 2026

London

London is the capital city of England and it's still caught in the euphoria of the 2012 Olympic Games which appeared in the city. The multi-million pound project really helped to provide a range of new jobs across the city and saw a number of housing developments mainly in the Stratford region. London remains to be the most popular visitor city in Britain with sight-seeing opportunities such as Buckingham Palace, Big Ben, Madame Tussauds and also the Thames River. Homes are diverse as well, dating back to Tudor, Georgian and Victorians eras.

Looking for House extensions in London?

Get free quotes from local builders

Get free quotes

House extensions pros in London

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 Extensions in Hemel Hempstead

No quote received

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.

Blue SKY Developers Limited

1 review(s)
Based: in London, NW3 6DX

Blue Sky Developers is a registered company in the UK that specialises in all building services you could require. We are based in North London but carry work out all around London.

Latest review

Vikram D., NW7
4

House Extensions in Mill Hill

Very straight and helpful. Provided useful advice and suggestions.

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

LW Building Service

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

Latest review

Rosa S., SE20
3

House Extensions 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 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 London

26 Apr

House Extensions

London - E7

Enquiry from: Mujibur O

Start Date: Less than one month

customer requested quotes for house extension from a builder around london. they are considering a couple of projects at the moment.call anytime to arrange appointment to discuss. the information belo...

Post a similar request >

27 Mar

House Extensions

London - SE19

Enquiry from: Natasha D

Start Date: Immediate

Customer in London area made an enquiry for House Extension online. Confirmed via SMS at 12:58 Please call to arrange an appointment to discuss options

Post a similar request >

24 Oct

House Extensions

London - E4

Enquiry from: Elaine R

Start Date: Immediate

Customer made an online enquiry for House Extension via one of our websites. Confirmed via . Please call to arrange an appointment to quote.

Post a similar request >

16 Oct

House Extensions

London - SW6

Enquiry from: Victor I

Start Date: Immediate

Customer made enquiry for House Extension quotes online. Confirmed interest via phone at 20:30 Homeowner lives in London area. Please call to arrange appointment

Post a similar request >

13 Oct

House Extensions

London - N14

Enquiry from: Rómulo V

Start Date: Immediate

Customer made an online enquiry for House Extension via one of our websites. Confirmed via . Please call to arrange an appointment to quote.

Post a similar request >

06 Oct

House Extensions

London - NW9

Enquiry from: Ekrem M

Start Date: Immediate

Customer is looking for quotes for House Extension from pros around London. Please call to arrange appointment to discuss

Post a similar request >

29 Sep

House Extensions

London - SE26

Enquiry from: Jennifer K

Start Date: Immediate

Customer in London area made an enquiry for House Extension online. Please call to arrange an appointment to discuss options

Post a similar request >

29 Sep

House Extensions

London - SE13

Enquiry from: Helen M

Start Date: Immediate

Customer made enquiry for House Extension quotes online. Homeowner lives in London area. Please call to arrange appointment

Post a similar request >

18 Aug

House Extensions

London - N22

Enquiry from: Derek A

Start Date: Immediate

kitchen and bathroom extension

Post a similar request >

03 Jul

House Extensions

London - N11

Enquiry from: Navin H

Start Date: Immediate

ground floor extension to an end terrace house 6m wide by 5m deep with a pitch roof and 2 sky panels

Post a similar request >

06 May

House Extensions

London - NW6

Enquiry from: Noam G

Start Date: Immediate

hi, i'm in the process of buying a house, which needs a fair bit of work. this would include converting an attached garage into a bedroom, knocking down a couple of walls, doing a small extension int...

Post a similar request >

22 Apr

House Extensions

London - E17

Enquiry from: Laura J

Start Date: Immediate

What type of property is this for? House What type of extension do you need? Single storey extension When was the property built? 1921 to 1979 How many stories is the current building? 2 Storeys D...

Post a similar request >

15 Apr

House Extensions

London - SW19

Enquiry from: Intisar C

Start Date: Immediate

customer in london areas is looking to do a couple of projects at the moment, and would like quotes for house extension.confirmed interest via sms and email at 15/04/2025 17:16.please call to arrange ...

Post a similar request >

09 Apr

House Extensions

London - SW16

Enquiry from: Andrea C

Start Date: Immediate

Customer is looking for House Extension quotes. They are unsure of options so would like to discuss. Confirmed interest via SMS/ Customer lives in London area Please call to arrange an appointment

Post a similar request >

02 Mar

House Extensions

London - SE9

Enquiry from: Amir A

Start Date: Immediate

Customer made enquiry for House Extension quotes online. Homeowner lives in London area. Please call to arrange appointment

Post a similar request >

22 Feb

House Extensions

London - SE25

Enquiry from: Zack K

Start Date: 1 to 3 months

sip construction for wraparound kitchen extension project with planning permission granted and structural & building regulations drawings available/in place. customer is currently in the process of l...

Post a similar request >

18 Feb

House Extensions

London - E4

Enquiry from: Mia G

Start Date: Immediate

Would like to get a cost estimate for loft and rear extension for a house that we are looking to purchase on Old Church Road, Chingford.

Post a similar request >

09 Jan

House Extensions

London - NW2

Enquiry from: Naciye H

Start Date: Immediate

Customer made an enquiry for House Extension via one of our websites. Looking at various options they would like to discuss directly Confirmed interest Please call to discuss and arrange appointment t...

Post a similar request >

21 Oct

House Extensions

London - SE26

Enquiry from: Ga R

Start Date: Immediate

Customer made an online enquiry for House Extension via one of our websites. Confirmed via . Please call to arrange an appointment to quote.

Post a similar request >

16 Oct

House Extensions

London - SE25

Enquiry from: Zack K

Start Date: Immediate

Ground floor wraparound extension

Post a similar request >

Local & reliable builders near me

Tell us about your house extensions project

Answer a few quick questions, so we can match you with local builders who can help.

Find up to 4 builders in London

Get free, no-obligation local house extensions quotes from 4 verified builders working in London.

Hire with confidence

Compare customer reviews, services and prices, and choose the right tradesperson for you.

Our reviews

Average

Would highly recommend

Would highly recommend, they found me a firm which I was happy with a quote they give me and went ahead and had my job done within 2 days of enquiring.

Good easy way to find a selection of…

Good easy way to find a selection of trades you need all in one place.

Love Local Quotes it's a big part of my …

Love Local Quotes it's a big part of my Business I would recommend to anyone

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.

Can I extend the front of my house?

When it comes to extending a home, the rear of the house often comes to mind a lot more than the front. However, this doesn’t mean that you can’t extend the front of your house. This can be done either as part of a renovation project whereby the entire house is incorporated or it can also be done in isolation. It’s possible to extend the front of your house without the need to apply for a planning permission, however, there are a bunch of limitations you’d have to comply with if you wish to carry out with such a project. Sometimes, this may imply that extending to the front of your home is more tedious and tasking than extending your home’s rear. So exactly how far can you extend the front of your home without planning permission?

 

The short and simple answer to this question is 2 metres square area with a height not more than 3 metres. Generally, you do not need a planning permission to build a front porch as long as its area doesn’t go beyond 2 square metres from a public road or walkway. Also, a tiled or slated roof can be as much as 4 metres but other roofs must not go beyond 3 metres in height. If you want to extend the front of your home beyond the restrictions specified, then you’ll have to apply for a planning permission.

 

Extending the front of home can be quite costly, but this can be controlled by not building to the extension to the highest specification, not including an extension on kitchens or bathrooms and more.

Do I need my neighbours’ permission for an extension?

Well the reality is, sometimes, neighbours just don’t get along. With several individuals living in close proximity, it’s little surprise they tend to get on one another’s nerves from time to time. However, there’s a difference between having a tiff and being able to transform your house the way you want without having to obtain your neighbour’s approval.

The short and simple answer to this question is, not necessarily. However, you must first educate yourself by thinking about your extension and how it affects the houses around you. We’d strongly recommend you talk proposals through with your neighbour so as to avoid possible conflicts later. There are a number of reasons why your neighbour can protest to your new home extension plans. Let’s take a look!

 

  • In the event whereby your new extension is blocking their view or providing an unwanted shade on their property. Here, they have a legitimate reason to protest as no one would want their once sunny garden suddenly covered or plummet into shade.
  • In the event where it leads to a loss of privacy. For instance, if your new extension possesses a window which overlooks the neighbour’s property in any way. This is likely to be taken as an invasion of privacy and that has a little to no chance of being a welcomed idea.
  • If it’s a major project and going to take a lot of weeks before completion. The noise generated, especially when your neighbours are enjoying your summer holidays or weekends, can make their gardens not as relaxing as it used to be.
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.

House extensions

Other Top Projects in London

Customer Reviews

Overall rating:


London House extensions installers are rated 4.4 out of 5 based on 22 reviews of 191 pros.
The LeadsDoWork rating and review is an overall rating based on verified reviews and feedback from the customers with House extensions projects that have been connected with House extensions pros to help them. All House extensions contractors All London House extensions contractors

Are you a builder in London?

We can help you get more house extensions work with our qualified job leads and boost your business.

Join today