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House extension comes with a vast array of advantages which makes it easy to see why the extension could be a excellent uptick in the prospective cost of your property in terms of sales. So if you're looking to develop a brand-new residence extension however still not convinced regarding the job, we're right here to aid you. Being totally conscious any home building work is generally a hefty investment, there's a huge demand to be set on your decision before arranging the commencement of any job. So are house extensions worth it? Below are several of the leading benefits offered by house extensions to assist you determine if it's one of the most ideal path for you.

 

What's Associated with Building an Extension?

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

 

  1. Obtaining Building Regulations or Planning Permission (if required as the extension is larger than permitted development).
  2. Checking your leasehold contract (if appropriate) to ensure you can do what you want to do.
  3. Hiring an architect  to draw the plans, considering your expected use ( cooking area, washroom, office).
  4. Hiring a competent builder with experience of larger projects.
  5. Calling your insurance coverage service provider to allow them recognize of the planned work ahead of it beginning.
  6. Acquiring car park permits if required for your specialists to guarantee they have easy access to your building.
  7. Making certain all prepared work falls within allowed allowables.
  8. Cleaning the area and digging deep into if required, consisting of the removal of trees.
  9. Structure work can start.

 

What is the cost of a house extension in city?

If you're thinking about including a two floor house extension, then establishing a allocate this task would be a fantastic method to start. Similar to a back extension, a two storey extension normally leaves the remainder of the structure requiring some work and also, due to its dimension, this may indicate the re-development of the entire house - which is why they can be really pricey. A few of the other influencing aspects that can have huge impact on a 2 floor house extension cost consists of: your area, the size of the build, complexity of the layout (anything beyond the basic develop will usually need more proficiency and time), the glazing to be included (the much more the glass utilized in the task, the more the material expense), along with the group utilized.

Average House extensions cost in Barnehurst

The regular cost of House extensions are £50,500 in Barnehurst. Costs vary based upon the materials and the company picked. The upper price range can be as high as £69,600. The material costs are in most cases around£10,500.

Average price per House extensions job in 2026

Avg. price low

Avg. price low
£33,400

Avg. price

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£50,500

Avg. price high

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£69,600

£70100

£52575

£35050

£17525

£0

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

House extensions installation cost in Barnehurst 2026

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

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Barnehurst

Barnehurst is a town and district in South East London within the London Borough of Bexley. It is north east of Bexleyheath, and is 13 miles east south-east of Charing Cross. It's separated from North Bexleyheath by the A220 Erith Road.

The town was established after the sale of land in 1881 to construct the Bexleyheath loop line between Lewisham and Dartford. Its name derives from the name of the railway station, which was named after Colonel Barne, who owned a nearby property and was vice-chairman of the railway company. Right now, the railway station runs trains between London Charing Cross, London Victoria or London Cannon Street, by means of Lewisham and Eltham to the west and Dartford railway station towards the east. There are 12 trains every hour in the course of the week; on Sundays, there are four trains each hour. The railway station was openedto stimulate the building of homes. The Barnehurst Estate was constructed in 1926 which housed a lot of people.

Along with the railway station, Barnehurst is served by 5 buses, 1 of which goes to the well-liked Bluewater Shopping Centre. There are limited shopping or leisure opportunities in the town, so individuals usually go to surrounding places utilising public transport links or the primary roads.

Barnehurst is residence towards the non-league football club Phoenix Sports FC, which plays at Phoenimx Sports Ground.

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House extensions pros in Barnehurst

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 Barnehurst

28 Jul

House Extensions

Bexleyheath - DA7

Enquiry from: Gretel D

Start Date: 1 to 3 months

relocation of a manhole as it is sitting in the extension and i would like it to be moved outside the extension. are you the property owner: owner of the property looking for: single storey extension ...

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26 Oct

House Extensions

Bexleyheath - DA7

Enquiry from: Yasmin B

Start Date: Immediate

hello! thank you in advance for your free service to help us with building outhouses and extensions in bexleyheath. we would like to build an outhouse/ guest cottage at the back of our garden. we'd l...

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21 Oct

House Extensions

Bexleyheath - DA7

Enquiry from: Yasmin B

Start Date: Immediate

hello! thank you in advance for your free service to help us with building outhouses and extensions in bexleyheath. we would like to build an outhouse/ guest cottage at the back of our garden. we'd l...

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10 Jul

House Extensions

Bexleyheath - DA7

Enquiry from: Piotr M

Start Date: Immediate

are you the property owner: owner have you considered getting your windows replaced to match a new conservatory: no other forms: house extension agreed to receive quotes for selected products: yes pl...

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23 Dec

House Extensions

Bexleyheath - DA7

Enquiry from: Anupam M

Start Date: Immediate

Submit your free quote for rated tradespeople

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10 Oct

House Extensions

Bexleyheath - DA7

Enquiry from: Abiola A

Start Date: Immediate

6m by 5 m extension, bi- fold doors, roof lantern. fitted kitchen, Loft conversion/ extension to create 2 rooms and bath/toilet. Full refurb of existing structure Customer is currently in the process...

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03 Oct

House Extensions

Bexleyheath - DA7

Enquiry from: Abiola A

Start Date: Immediate

6m by 5 m extension, bi- fold doors, roof lantern. fitted kitchen, Loft conversion/ extension to create 2 rooms and bath/toilet. Full refurb of existing structure

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16 May

House Extensions

Bexleyheath - DA7

Enquiry from: Cengiz O

Start Date: Immediate

Are you the property owner: Owner of the property Property Type: Semi detached Do you have planning permission: Yes Looking For: Double storey extension Do you have plans drawn up: No Do you require P...

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30 May

House Extensions

Bexleyheath - DA7

Enquiry from: Natalie S

Start Date: Immediate

Level foundation and cement the base, breeze block building 4m x 7.5m, render outside and plaster inside, plasterboard partition, pitched roof with tiles, upvc doors and windows, electrics with spot l...

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09 Apr

House Extensions

Bexleyheath - DA7

Enquiry from: Rosanna A

Start Date: Immediate

I want to have kitchen extension but don't have drawings. I would prefer someone to come and give us idea of how we're going to do it in a no obligation quote.

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05 Apr

House Extensions

Bexleyheath - DA7

Enquiry from: Mrs D

Start Date: Immediate

2 storey rear extension, comprising kitchen extension and a new upstairs bedroom with two bathrooms to replace the existing one. There's also the requirement to reposition the drainage.

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01 Apr

House Extensions

Bexleyheath - DA7

Enquiry from: Laura O

Start Date: Immediate

We are looking to appoint a contractor that will be responsible for managing our extension and refurbishment project. It is expected that the contractor will be able to deliver within the agreed timet...

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31 Mar

House Extensions

Bexleyheath - DA7

Enquiry from: Dot N

Start Date: Immediate

2 storey back extension comprising kitchen, two bathrooms and repositioning drainage/sewer Customer is currently in the process of looking for quotes to add a Double storey extension to their propert...

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30 Mar

House Extensions

Bexleyheath - DA7

Enquiry from: Ismayil A

Start Date: Less than one month

Build 2 storey extension to side of 3 bedroom semi. Garage and two rooms behind on ground floor then single room above. Built to water tight shell. Then single storey extension across back on the hous...

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17 Oct

House Extensions

Bexleyheath - DA7

Enquiry from: S

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Extension (12 meter square *) + renovation + new kitchen

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03 Jul

House Extensions

Bexleyheath - DA7

Enquiry from: K

Start Date: Immediate

Rear extension

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26 May

House Extensions

Bexleyheath - DA7

Enquiry from: R

Start Date: Immediate

rear 5 metres by 5 metres kitchen extension.

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29 Mar

House Extensions

Bexleyheath - DA7

Enquiry from: Jusline O

Start Date: Immediate

Extending the attached garage upstairs Are you the property owner: Owner of the property Looking For: Single storey extension Do you have planning permission: Yes Do you have plans drawn up: No Do yo...

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13 Jan

House Extensions

Bexleyheath - DA7

Enquiry from: Tina K

Start Date: Immediate

Home owner Single extension to remove conservatory and change it for an extension Immediate Please call to appoint *

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15 Dec

House Extensions

Bexleyheath - DA7

Enquiry from: Daniel B

Start Date: Immediate

Double story side extention,. And continuing the 3 meter single story existing extension across the new extention at the rear of the house Are you the property owner: Owner of the property Property Ty...

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FAQs

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.

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.

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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