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House Extension in city

House extension includes a wide variety of benefits that makes it very easy to see why the extension could be a terrific uptick in the prospective price of your building in terms of sales. So if you're seeking to build a new home extension but still not encouraged about the job, we're right here to assist you. Being totally conscious any kind of residence building and construction job is typically a heavy financial investment, there's a big demand to be set on your choice prior to scheduling the beginning of any work. So are house extensions worth it? Below are a few of the leading advantages provided by house extensions to assist you determine if it's one of the most appropriate route for you.

 

What's Involved in Adding an Extension?

The steps will vary depending upon the extent of your extension, but you can anticipate some, if not all, of the below to be involved when adding an expansion to your home:

 

  1. Getting Building Regulations or Planning Permission (if required as the extension is larger than permitted development).
  2. Checking your leasehold agreement (if applicable) to see to it you can do what you want to do.
  3. Enlisting an architect  to prepare the plans, considering your planned use ( cooking area, shower room, office).
  4. Hiring a competent builder with experience of larger projects.
  5. Contacting your insurance provider to allow them recognize of the prepared work ahead of it starting.
  6. Getting auto parking allows if needed for your professionals to guarantee they have simple access to your building.
  7. Making sure all intended work drops within allowed allowables.
  8. Clearing up the area as well as digging deep into if necessary, consisting of the elimination of trees.
  9. Structure work can start.

 

What is the expense of a house extension in city?

If you're considering including a two floor house extension, after that establishing a budget for this project would be a great way to get going. Similar to a back extension, a 2 storey extension normally leaves the rest of the structure requiring some job and, due to its size, this may imply the re-development of the entire house - which is why they can be really pricey. Some of the other affecting aspects that can have big influence on a two storey house extension expense consists of: your area, the dimension of the build, intricacy of the style (anything beyond the typical build will normally need even more know-how as well as time), the glazing to be integrated (the much more the glass utilized in the job, the more the product price), in addition to the group utilized.

Average House extensions cost in Chislehurst

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

House extensions installation cost in Chislehurst 2026

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

House extensions searches in September 2026

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Chislehurst

Chislehurst is a suburban area in southeast London and forms part of the Bromley borough electoral ward. The region boasts a populace above 50,000 and today is among the more wealthy and most highly-priced regions in Bromley. For that reason, it's really crucial to keep the property up-to-date and retain property value during the challenging housing market. For home developments work with vetted tradesmen in Chislehurst to get good value for money from vetted companies.

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House extensions pros in Chislehurst

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.

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
5

House Extensions in Rochester

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

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...

Similar Customer Enquiries for House extensions in Chislehurst

10 Jun

House Extensions

Chislehurst - BR7

Enquiry from: Anne M

Start Date: Immediate

customer in chislehurst 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 10/06/2021 17:03.please call to arr...

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27 Aug

House Extensions

Chislehurst - BR7

Enquiry from: James C

Start Date: Immediate

looking to remove the existing glass porch and replace with a part brick part glass structure are you the property owner: owner of the property do you have planning permission: no what material are yo...

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25 Jul

House Extensions

Chislehurst - BR7

Enquiry from: Francis A

Start Date: Immediate

Garage conversion and side extension

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16 May

House Extensions

Chislehurst - BR7

Enquiry from: Seun S

Start Date: Immediate

Submit your free quote for rated tradespeople

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20 Feb

House Extensions

Chislehurst - BR7

Enquiry from: Nene A

Start Date: Immediate

Single storey rear extension (3x5)m. Party wall exists on either side.

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15 Feb

House Extensions

Chislehurst - BR7

Enquiry from: Ryan G

Start Date: 1 to 3 months

Are you the property owner: Owner Have you considered getting your windows replaced to match a new conservatory: No Other Forms: 45 Agreed to recieve quotes for selected products: Yes Please call to ...

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01 Feb

House Extensions

Chislehurst - BR7

Enquiry from: CHARLES W

Start Date: 1 to 3 months

Homeowner Please contact to appoint

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22 Jan

House Extensions

Chislehurst - BR7

Enquiry from: Algirdas D

Start Date: 1 to 3 months

Homeowner Please contact to appoint

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27 Sep

House Extensions

Chislehurst - BR7

Enquiry from: Shylaja S

Start Date: Immediate

Single storey flat roof extension.

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05 Sep

House Extensions

Chislehurst - BR7

Enquiry from: Shylaja S

Start Date: Immediate

Single storey flat roof extension.

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31 Aug

House Extensions

Chislehurst - BR7

Enquiry from: Shylaja S

Start Date: Immediate

Single storey flat roof extension.

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25 May

House Extensions

Chislehurst - BR7

Enquiry from: KIRK S

Start Date: Less than one month

5metres by 6metres single storey extension to rear. flat roof but pitched around the sides , with lantern light / skylight Property Type: Detached Time scale: Less than one month Please call to appoin...

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14 Feb

House Extensions

Chislehurst - BR7

Enquiry from: Preetum D

Start Date: Immediate

Customer visited the myhouseextension.co.uk site and submitted an enquiry. Property type: Semi detached, Work description: Full rear extension by 3 metres (width about 8 metres), with flat roof, sky...

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17 Nov

House Extensions

Chislehurst - BR7

Enquiry from: Anthony A

Start Date: 3+ months

over dinning and garage extension, looking to get 2 rooms

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14 Nov

House Extensions

Chislehurst - BR7

Enquiry from: T P

Start Date: Immediate

Refurb of a house (200 sq.m) built in 1980 with potential extension Are you the property owner: Owner of the property Property Type: Detached Looking For: Single storey extension Do you have planning...

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13 Nov

House Extensions

Chislehurst - BR7

Enquiry from: Annika J

Start Date: Immediate

Single storey extension and creation of kitchen diner living space Are you the property owner: Owner of the property Property Type: Terrace Looking For: Single storey extension Do you have planning p...

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10 Aug

House Extensions

Chislehurst - BR7

Enquiry from: Gordon A

Start Date: 3+ months

Rear single storey extension, full width of house, out approx. 3m. Open up kitchen and dining room of 1930's semi and extend out. Are you the property owner: Owner of the property Property Type: Semi ...

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11 Jan

House Extensions

Chislehurst - BR7

Enquiry from: Avi D

Start Date: Immediate

Home owner Detached Looking at either a two Storey extension - create more living space Or a Single storey and Loft conversion advise on best option Assist with plans and Planning permission Time...

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30 Dec

House Extensions

Chislehurst - BR7

Enquiry from: Jeff P

Start Date: Immediate

We have a very typical 1930's 3 bed semi and are looking for an extension from the dining room and kitchen area on the ground floor. The plan would be to extend by about 8ft - 10ft. The new area would...

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26 Aug

House Extensions

Chislehurst - BR7

Enquiry from: Yuqi L

Start Date: Immediate

Wrap around extension, including an ensuite guest bedroom, a family room and a utility room Please contact to appoint

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FAQs

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 much does a two storey house extension cost?

If you’re considering adding a two storey house extension, then setting a budget for this project would be a great way to get started. Similar to a rear extension, a two storey extension usually leaves the rest of the building needing some work and, due to its size, this may imply the re-development of the entire house - which is why they can be very costly. Some of the other influencing factors that can have big impact on a two storey house extension cost includes: your location, the size of the build, complexity of the design ( anything beyond the standard build will normally require more expertise and time), the glazing to be incorporated ( the more the glass used in the project, the more the material cost), as well as the team used.

Generally, when it comes to extensions, the major part of the expenses will be made on the build of the project. This is because it doesn’t only cover the material cost but also the contractor’s overhead as well as the daily rates. At this stage, the extension prices can be determined by the standard of the work that’s being done.

For a fairly average room size of about 18 square metre, the two storey extension should cost within the range of £2,500 to £3,000 per square metre - with the range being determined by the finishes incorporated. Therefore, a two storey extension of about 18 square metre should cost within the range of £45,000 to £55,000. However, this is with the assumption that there are standard window sizes, bathroom suits are modest, and without any need for any purpose joinery or glazing. If you wish to include all these extra features you’ll also have to pay more to make the total cost between £70,000 to £80,000.

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.

are house extensions worth it?

Often referred to by many as the holy grail of home improvements, house extension comes with a wide range of benefits which makes it easy to see why the extension could be a great uptick in the potential price of your property in terms of sales. So if you’re looking to build a new home extension but still not convinced about the project, we’re here to help you. Being fully aware any home construction work is usually a heavy investment, there’s a huge need to be set on your decision before scheduling the commencement of any work. So are house extensions worth it? Below are some of the top benefits offered by house extensions to help you decide if it’s the most suitable route for you.

• Add To Your Home’s Value

Building an home extension is a great way to add value to your home before selling. Increasing the living space of your home is an incredible appeal to many buyers which significantly increases your property’s total value. However, you must ensure that the extension is impressively designed using top quality materials in order to generate more value.

• Good Alternative To House Moving

The most common reason for moving is usually due to a lack of sufficient space, but with house prices steadily on the increase a cost effective alternative is highly sought after. This alternative is house extension which creates more space for the household to spread out and have more privacy.

• You May Not Require A Planning Permission

You can extend your house and still not need to apply for a planning permission. To achieve this, simply comply with the laid down rules set under the permitted development rights.

• Extra Living Space

If you fill you’re starting to outgrow your existing structure and do not buy into the idea of moving, then your best bet might just be to extend your home.

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Chislehurst House extensions installers are rated 4.3 out of 5 based on 13 reviews of 90 pros.
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