House Extension in city

Find House Extension Prices in city

Home > Extensions & Conversions Projects > House extensions > Barnet

House Extension in city

House extension comes with a variety of benefits which makes it simple to see why the extension could be a excellent uptick in the potential rate of your residential property in regards to sales. So if you're wanting to construct a new home extension but still not convinced regarding the job, we're here to help you. Being completely aware any residence building and construction job is generally a hefty financial investment, there's a massive demand to be set on your decision before arranging the beginning of any job. So are house extensions worth it? Below are some of the leading benefits used by house extensions to aid you choose if it's the most appropriate course for you.

 

What's Involved in Adding an Extension?

The steps will differ depending upon the extent of your extension, yet you can expect some, if not all, of the listed below to be involved when including an extension to your house:

 

  1. Obtaining Building Regulations or Planning Permission (if required as the extension is larger than permitted development).
  2. Inspecting your leasehold arrangement (if applicable) to make certain you can do what you intend to do.
  3. Getting an architect  to create the plans, considering your intended usage ( cooking area, washroom, study).
  4. Hiring a competent builder with experience of larger projects.
  5. Calling your insurance coverage carrier to let them recognize of the prepared work ahead of it beginning.
  6. Acquiring auto parking allows if required for your service providers to guarantee they have easy access to your house.
  7. Making certain all intended work drops within allowed allowables.
  8. Clearing the space as well as digging deep into if essential, consisting of the elimination of trees.
  9. Building work can start.

 

What is the expense of a house extension in city?

If you're thinking about including a two floor house extension, after that setting a budget for this task would certainly be a terrific means to begin. Similar to a rear extension, a 2 storey extension generally leaves the rest of the building requiring some work and also, as a result of its size, this might imply the re-development of the entire house - which is why they can be really pricey. Several of the other influencing aspects that can have large influence on a two floor house extension cost consists of: your location, the size of the construct, intricacy of the layout (anything beyond the typical develop will usually require more know-how as well as time), the glazing to be integrated (the a lot more the glass utilized in the task, the more the product price), along with the group used.

Average House extensions cost in Barnet

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

House extensions installation cost in Barnet 2026

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

House extensions on Google in Barnet

Google searches that showed Local Quotes, 15 July to 12 October 2026

8,116

Searches that showed one of our pages for Barnet, all services

Source: Google Search Console, the number of times our pages appeared in Google search results. It counts searches that showed the page, not quote requests.

Barnet

Barnet is a substantial London borough with a population boasting 356,400. The fact is, it's the second largest borough in England's capital city with an region of 86.74 square kilometres. Formed in 1965, the area belongs to both Middlesex and Hertfordshire. Be sure to identify your ideal home improvement firm in Barnet by matching up no cost quotations.

Looking for House extensions in Barnet?

Get free quotes from local builders

Get free quotes

House extensions pros in Barnet

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 Extension in London

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

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 Extension in Hemel Hempstead

No quote received

JPA Building Construction LTD

1 review(s)
Based: in Twickenham , TW1 1AG

Latest review

Rosa S., SE20
5

House Extension 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 and around Barnet

14 Aug

House extensions

London - N21

Enquiry from: Saeed Y

Start Date: Immediate

Loft conversion side and rear extension

Post a similar request >

16 Jul

House extensions

Southall - UB1

Enquiry from: Lisa A

Start Date: Immediate

I need a extension planing, design and build

Post a similar request >

26 Apr

House extensions

London - E7

Enquiry from: Mujibur O

Start Date: Less than one month

They are considering a couple of projects at the moment

Property: terrace

Post a similar request >

01 Nov

House extensions

Enfield - EN1

Enquiry from: Sarah F

Start Date: Immediate

House extensions enquiry

Post a similar request >

01 Nov

House extensions

Watford - WD24

Enquiry from: Namgyal L

Start Date: Immediate

House extensions enquiry

Post a similar request >

31 Oct

House extensions

Epping - CM16

Enquiry from: Shila K

Start Date: Immediate

House extensions enquiry

Post a similar request >

26 Oct

House extensions

Harrow - HA3

Enquiry from: Divyaba R

Start Date: Immediate

House extensions enquiry

Post a similar request >

24 Oct

House extensions

Edgware - HA8

Enquiry from: Naran V

Start Date: Immediate

House extensions enquiry

Post a similar request >

24 Oct

House extensions

London - E4

Enquiry from: Elaine R

Start Date: Immediate

House extensions enquiry

Post a similar request >

20 Oct

House extensions

Dagenham - RM8

Enquiry from: Merra T

Start Date: Immediate

House extensions enquiry

Post a similar request >

16 Oct

House extensions

London - SW6

Enquiry from: Victor I

Start Date: Immediate

House extensions enquiry

Post a similar request >

13 Oct

House extensions

London - N14

Enquiry from: Rómulo V

Start Date: Immediate

House extensions enquiry

Post a similar request >

09 Oct

House extensions

Ruislip - HA4

Enquiry from: Kanti M

Start Date: 1 to 3 months

Mr lives in the ruislip area and would like a call to discuss options

Property: detached

Post a similar request >

06 Oct

House extensions

London - NW9

Enquiry from: Ekrem M

Start Date: Immediate

House extensions enquiry

Post a similar request >

29 Sep

House extensions

London - SE13

Enquiry from: Helen M

Start Date: Immediate

House extensions enquiry

Post a similar request >

26 Sep

House extensions

Hatfield - AL9

Enquiry from: Tony R

Start Date: Immediate

House extensions enquiry

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 >

27 Jul

House extensions

Woodford Green - IG8

Enquiry from: Ali R

Start Date: Immediate

House extensions enquiry

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 >

12 May

House extensions

Pinner - HA5

Enquiry from: Mohamed H

Start Date: Immediate

House extensions enquiry

Post a similar request >

Advertisement

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 Barnet

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

Hire with confidence

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

Our reviews

Average

We haven't decided yet

We haven't decided yet

Helped find a good company without ...

Helped find a good company without all the ringing around

Simple process which gets you resul ...

Simple process which gets you results! Well done.

FAQs

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.

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.
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.

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.

House extensions

Other Top Projects in Barnet

Are you a builder in Barnet?

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

Join today