House Extension in city

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House Extension in city

House extension includes a variety of benefits that makes it very easy to see why the extension could be a excellent uptick in the prospective price of your building in terms of sales. So if you're looking to develop a new residence extension but still not persuaded about the job, we're here to assist you. Being fully mindful any type of house building and construction job is typically a hefty financial investment, there's a significant requirement to be set on your choice prior to arranging the commencement of any type of work. So are house extensions worth it? Below are a few of the top benefits supplied by house extensions to help you choose if it's the most suitable route for you.

 

What's Involved in Including an Extension?

The steps will vary depending upon the range of your extension, but you can expect some, if not all, of the below to be entailed when including an extension to your residence:

 

  1. Obtaining Building Regulations or Planning Permission (if called for as the extension is larger than permitted development).
  2. Inspecting your leasehold contract (if suitable) to ensure you can do what you want to do.
  3. Getting an architect  to draw the plans, considering your expected usage (kitchen, bathroom, office).
  4. Hiring a competent builder with experience of larger projects.
  5. Calling your insurance coverage service provider to allow them understand of the planned work ahead of it beginning.
  6. Getting car parking permits if required for your specialists to ensure they have very easy access to your house.
  7. Ensuring all intended work falls within allowed allowables.
  8. Cleaning the space as well as digging deep into if essential, consisting of the elimination of trees.
  9. Building job can begin.

 

What is the cost of a house extension in city?

If you're taking into consideration adding a 2 floor house extension, after that setting a allocate this task would certainly be a wonderful method to get going. Comparable to a rear extension, a two storey extension generally leaves the remainder of the structure needing some job and, because of its dimension, this might suggest the re-development of the whole house - which is why they can be very pricey. Some of the other affecting variables that can have large effect on a two floor house extension cost includes: your place, the size of the construct, complexity of the layout (anything beyond the typical build will generally call for even more know-how and time), the glazing to be included (the much more the glass used in the project, the much more the material price), in addition to the team used.

Average House extensions cost in London County

The regular cost of House extensions are £62,143 in London County. 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 County, as reported by local LeadsDoWork members.

House extensions installation cost in London County 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 County in May 2026

307,195

Requests for quotations in London County in May 2026

1,000

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

1,050

Requests for House extensions quotations in Greater London 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 County May 2026

720

Requests for quotations in London in May 2026

27

Requests for quotations in Westminster in May 2026

London County

The capital city of Great Britain has got the biggest metropolitan area in the UK having a populace exceeding eight million. London is situated all around the River Thames and contains several of the world's most famous landmarks including Big Ben, Buckingham Palace and the Houses of Parliament. The capital is easily the most visited city in the world, together with the biggest airport system calculated by passenger traffic. London is split into thirty two boroughs, including Bromley, Hackney, Croydon and the city of Westminster. London boasts a population density ten times greater than every other UK area, with 4,542 residents per square metre. With a mixture of era and modern day housing, make sure you develop your property with vetted trade professionals.

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House extensions pros in London County

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
25th February 2022
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
3rd August 2024
5

House Extensions in London

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

Options Home Improvements LTD

1 review(s)
Based: in Kent, ME8 0DB

Here at Options Home Improvements we specialize is the bespoke design & installation of PVCu & Aluminium, windows and doors, orangeries & conservatories in Gillingham, Kent & South East area. Options Home Improvements was started due to the seemi...

Latest review

Lisa V., ME1
7th August 2016
5

House Extensions in Rochester

I haven't had the extension built yet but am planning to use them

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
30th October 2015
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
4th October 2016
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
10th March 2016
5

House Extensions in Esher

excellent communication

LW Building Service

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

Latest review

Rosa S., SE20
10th October 2015
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
10th October 2015
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 County

26 Apr

House Extensions

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House extensions Lead

are you the property owner: owner of the property property type: terrace looking for: single storey extension do you have planning permission: no do you have plans drawn up: yes do you require plumbi...

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

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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

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Brentwood - CM14

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are you the property owner: owner of the property property type: terrace looking for: single storey extension do you have planning permission: no do you have plans drawn up: no do you require plumbin...

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customer made an enquiry for house extension and confirmed on the local quotes site they would like quotes from a builder.mr lives in the ruislip area and would like a call to discuss options.see belo...

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London - NW9

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London - SE26

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London - SE13

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London - N22

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kitchen and bathroom extension

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Pinner - HA5

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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.

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 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.

Will my extension be expensive?

It depends on the size and type of extension. Small porches or flat roof extensions are very reasonably priced. More substantial two storey extensions can be expensive. In general, the price is roughly proportional to the amount of space you add to your home.

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