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House Extension in city

House extension features a wide variety of advantages that makes it simple to see why the extension could be a fantastic uptick in the prospective rate of your residential or commercial property in terms of sales. So if you're looking to construct a brand-new house extension but still not convinced about the task, we're right here to help you. Being completely aware any kind of residence construction job is normally a hefty investment, there's a significant need to be set on your choice prior to setting up the commencement of any type of work. So are house extensions worth it? Below are several of the top benefits provided by house extensions to aid you determine if it's the most ideal course for you.

 

What's Involved in Including an Extension?

The actions will certainly differ relying on the extent of your extension, yet you can anticipate some, otherwise all, of the below to be entailed when adding an extension to your house:

 

  1. Acquiring Building Regulations or Planning Permission (if required as the extension is larger than permitted development).
  2. Examining your leasehold agreement (if appropriate) to make certain you can do what you want to do.
  3. Employing an architect  to draw up the plans, considering your planned use ( cooking area, bathroom, office).
  4. Hiring a competent builder with experience of larger projects.
  5. Calling your insurance coverage carrier to allow them understand of the intended job ahead of it beginning.
  6. Obtaining car parking allows if required for your professionals to guarantee they have very easy access to your building.
  7. Making certain all planned work drops within permitted allowables.
  8. Clearing up the area and also excavating if required, consisting of the removal of trees.
  9. Building work can start.

 

What is the price of a house extension in city?

If you're considering adding a two storey house extension, after that establishing a allocate this task would be a great method to start. Similar to a rear extension, a 2 storey extension normally leaves the rest of the structure requiring some job and also, as a result of its size, this may suggest the re-development of the entire house - which is why they can be extremely costly. Some of the other affecting elements that can have large effect on a two floor house extension price includes: your place, the size of the construct, intricacy of the layout (anything beyond the standard build will generally call for more competence as well as time), the glazing to be included (the more the glass utilized in the project, the much more the material cost), along with the team used.

Average House extensions cost in Purley

The regular cost of House extensions are £51,667 in Purley. 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 Purley, as reported by local LeadsDoWork members.

House extensions installation cost in Purley 2026

Labour cost £27,000
Material cost £10,500
Waste removal £2,500
Time frame: 10-14 weeks
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House extensions searches in October 2026

House extensions Projects in Purley in September 2026

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Requests for House extensions quotations in Purley in September 2026. -26% change from August 2026.

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Purley

Purley belongs to the Croydon borough, based in the Greater London area together with a population of 72,000. The town expanded swiftly between the 1920s and 30s and in 2002 was thought to be housing the greatest earners in the Uk. This means the town of Purley is an attractive area for those travelling into the city of London, therefore ensure to keep your home up-to-date and add value with work carried out by vetted businesses within Purley.

Looking for House extensions in Purley?

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House extensions pros in Purley

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 Purley

16 Mar

House Extensions

Kenley, Purley - CR8

Enquiry from: Francis T

Start Date: Immediate

Height extension of existing flat roofed detached garage. The garage is currently approx. 3m at highest point. Brick stitching. Replacement of existing double window space with smaller window and side...

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08 Jul

House Extensions

Kenley, Purley - CR8

Enquiry from: Rachel B

Start Date: Immediate

we have an existing open porch and would like to close in with double glazing. are you the property owner: owner of the property do you have planning permission: no what material are you looking for: ...

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26 Jul

House Extensions

Kenley, Purley - CR8

Enquiry from: Laurel M

Start Date: Immediate

We have a barn and want 6 x 12 x 15 internal stables please

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11 Apr

House Extensions

Kenley, Purley - CR8

Enquiry from: Charlene H

Start Date: Immediate

Property Type: Semi Detached Have you got a rough idea of the design you would like: Some Ideas How many bedrooms are you looking to have: 5+ Bedrooms How many storeys are you looking for the propert...

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02 Feb

House Extensions

Kenley, Purley - CR8

Enquiry from: Jenna F

Start Date: 1 to 3 months

Two storey side extension which will include new bedroom and en shite bathroom. Plus kitchen extension Are you the property owner: Owner of the property Property Type: Semi detached Looking For: Doub...

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18 Jan

House Extensions

Kenley, Purley - CR8

Enquiry from: Thevahe P

Start Date: Immediate

extension at the back of the house Are you the property owner: Owner of the property Customer is currently in the process of looking for quotes to add a Single storey extension to their property. Are...

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08 Jan

House Extensions

Kenley, Purley - CR8

Enquiry from: Sukhvinder E

Start Date: 3+ months

Customer visited the myhouseextension.co.uk site and submitted an enquiry. Property type: Detached, Work description: 4 bedroom house to be changed to two 2 bedroom flats so need 1 new kitchen u...

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08 Jan

House Extensions

Kenley, Purley - CR8

Enquiry from: Ncola W

Start Date: 1 to 3 months

Customer visited the myhouseextension.co.uk site and submitted an enquiry. Property type: Semi detached, Work description: extending our kitchen into the back garden Customer is currently in the pr...

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23 Oct

House Extensions

Kenley, Purley - CR8

Enquiry from: Georgia P

Start Date: Immediate

Property Type: Detached House 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 prope...

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02 May

House Extensions

Kenley, Purley - CR8

Enquiry from: Pat M

Start Date: Less than one month

Customer visited the myhouseextension.co.uk site and submitted an enquiry. Property type: Semi detached, Work description: Single story side extension. Consisting of half garage and extension of kit...

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21 Mar

House Extensions

Kenley, Purley - CR8

Enquiry from: ALEXANDRA C

Start Date: 3+ months

Property type: Semi detached, Work description: i would like a kitchen extension and side extension off present kitchen to inter link with lounge. 2m x 3.5m rear extension and one 3.6mx 4m side exten...

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27 Dec

House Extensions

Kenley, Purley - CR8

Enquiry from: Amit P

Start Date: Immediate

2 storey extension (estimated size of 7m x 4m) along the entire side of a 3 bed semi-detached property which contains a plot of land which is currently used as a large driveway and there is currently ...

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14 Nov

House Extensions

Kenley, Purley - CR8

Enquiry from: Dawn H

Start Date: 1 to 3 months

Toilet kitchen and bedroom|garage extension but there is room from the porch area. I need a granny flat with bedroom small kitchen and shower room. Are you the property owner: Owner of the property Pr...

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20 Sep

House Extensions

Kenley, Purley - CR8

Enquiry from: Gratien A

Start Date: Immediate

To demolish a detached double garage and a one bedroom annex behind it. In its place build a two story rear extension, available space is about 12 by 8 meters. Existing house: Break some walls to crea...

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05 Jul

House Extensions

Kenley, Purley - CR8

Enquiry from: Øyvind T

Start Date: Immediate

Home owner Rear and side extension to our house, and we would like to explore the flatpack/pre fabricated option - side extension will be approximately 30sqm (bedroom, bath and utility room)and the r...

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29 Jun

House Extensions

Kenley, Purley - CR8

Enquiry from: Gratien A

Start Date: Immediate

Home owner Rear 2 storey extension to a detached house. Ground and first floor. ground floor size is approx. 10m by 8m with the 1st floor extension to be a little smaller Assist with plans and plann...

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19 Jun

House Extensions

Kenley, Purley - CR8

Enquiry from: Øyvind T

Start Date: Immediate

Dear Sir/Madam We are in the process of planning a rear and side extension to our house, and we would like to explore the flatpack/pre fabricated option. The side extension will be approxima...

Post a similar request >

27 Apr

House Extensions

Kenley, Purley - CR8

Enquiry from: Gratien A

Start Date: Immediate

Rear 2 storey extension to a detached house. Ground and first floor. ground floor size is approx. 10m by 8m with the 1st flor extension to be a little smaller Are you the property owner: Owner of th...

Post a similar request >

03 Apr

House Extensions

Kenley, Purley - CR8

Enquiry from: Ben T

Start Date: Immediate

Home Owner 2 Storey Extension 11.3 metres x 3.5 meters Please Call to Appoint

Post a similar request >

22 Jun

House Extensions

Kenley, Purley - CR8

Enquiry from: Steve H

Start Date: Immediate

two bed terraced house with 2 story rear bathroom above kitchen. Intention is to extend lower storey to width of plot thereby extending ground floor. Accesses to be changed as appropriate, enlargemen...

Post a similar request >

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FAQs

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.
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.

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.

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