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House Extension in city

House extension comes with a wide variety of advantages which makes it simple to see why the extension could be a great uptick in the potential price of your property in regards to sales. So if you're aiming to develop a new residence extension but still not convinced regarding the task, we're below to aid you. Being totally mindful any house building and construction job is usually a hefty financial investment, there's a massive need to be set on your choice prior to scheduling the commencement of any kind of job. So are house extensions worth it? Below are several of the top advantages used by house extensions to aid you make a decision if it's the most ideal course for you.

 

What's Involved in Including an Extension?

The steps will certainly vary depending on the extent of your extension, however you can expect some, if not all, of the listed below to be included when adding an expansion to your house:

 

  1. Acquiring 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 create the plans, considering your intended usage ( kitchen area, restroom, research study).
  4. Hiring a competent builder with experience of larger projects.
  5. Contacting your insurance policy provider to let them recognize of the intended job ahead of it starting.
  6. Obtaining vehicle parking allows if needed for your service providers to guarantee they have easy access to your home.
  7. Ensuring all intended job drops within allowed allowables.
  8. Cleaning the space and also digging deep into if needed, including the removal of trees.
  9. Structure work can start.

 

What is the expense of a house extension in city?

If you're thinking about adding a two floor house extension, after that establishing a budget for this job would be a terrific way to get started. Comparable to a rear extension, a 2 storey extension generally leaves the remainder of the building needing some job as well as, as a result of its dimension, this may indicate the re-development of the entire house - which is why they can be very expensive. Some of the various other affecting factors that can have large impact on a two floor house extension cost includes: your location, the dimension of the build, intricacy of the style (anything beyond the conventional develop will normally call for even more knowledge and also time), the glazing to be incorporated (the extra the glass used in the task, the extra the product cost), in addition to the team utilized.

Average House extensions cost in Stanmore

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

House extensions installation cost in Stanmore 2026

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

House extensions searches in September 2026

House extensions Projects in Stanmore in August 2026

1,643

Requests for quotations in Stanmore in August 2026

9

Requests for House extensions quotations in Stanmore in August 2026. 29% change from July 2026.

50

Requests for House extensions quotations in Middlesex in August 2026. 25% change from July 2026.

Source: Numbers calculated based on the search volumes in major search engines

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Stanmore

Stanmore is a suburban region positioned inside the London Borough of Harrow, which is positioned to the northwest of Greater London. The area is characterised by numerous restaurants and cafes and it is mostly an affluent district. What this means is keeping property value is crucial in Stanmore, so exclusively use local, vetted tradespeople to make certain a great price and good quality finish to the work you need carried out.

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House extensions pros in Stanmore

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.

Tectra Partnership Ltd

1 review(s)
Based: in Slough, SL3 0JE

Latest review

Deepak S., KT10
5

House Extensions in Esher

excellent communication

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 Stanmore

13 May

House Extensions

Stanmore - HA7

Enquiry from: Jay P

Start Date: 1 to 3 months

Are you the property owner: Owner of the property Other Forms: 17, 77, 45, 5 Agreed to recieve quotes for selected products: Yes Please call to appoint

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12 Apr

House Extensions

Stanmore - HA7

Enquiry from: Philip C

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: 3-4 Bedrooms How many storeys are you looking for the proper...

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20 Mar

House Extensions

Stanmore - HA7

Enquiry from: Komaleswaran L

Start Date: Immediate

Two storied building

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23 Sep

House Extensions

Stanmore - HA7

Enquiry from: Rajeev K

Start Date: Immediate

3 metre in depth and 5 metre in lenght

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28 Jul

House Extensions

Stanmore - HA7

Enquiry from: Beryl W

Start Date: Less than one month

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: 1-2 Bedrooms How many storeys are you looking for the proper...

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13 Jul

House Extensions

Stanmore - HA7

Enquiry from: NAJMU B

Start Date: Immediate

Are you the property owner: Owner of the property Property Type: Time scale: Other Forms: 45 Agreed to recieve quotes for selected products: Yes Please call to appoint

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18 Apr

House Extensions

Stanmore - HA7

Enquiry from: Mandy L

Start Date: 1 to 3 months

Property owner House extension Supplied and fitted Please call to appoint

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16 Apr

House Extensions

Stanmore - HA7

Enquiry from: Mandy L

Start Date: 1 to 3 months

it is about a single storey side extension, garage conversion and internal refurbishment. please advise an estimated costs and materials for the jobs done. Thanks a lot! Customer is currently in th...

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14 Feb

House Extensions

Stanmore - HA7

Enquiry from: Nisar A

Start Date: Immediate

Customer visited the myhouseextension.co.uk site and submitted an enquiry. Property type: Semi detached, Work description: 2 bedroom extension in the loft. Are you the property owner: Owner of t...

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06 Feb

House Extensions

Stanmore - HA7

Enquiry from: Mohamed R

Start Date: Immediate

6 meter rear extension with utility room and kitchen diner. Old kitchen to be converted into wet room. Are you the property owner: Relative of Owner Property Type: Semi detached Looking For: Single...

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26 Jan

House Extensions

Stanmore - HA7

Enquiry from: R

Start Date: Immediate

3m x 6m extension on the rear of the house. With a door coming into the living room. The retention needs to be split to fit a wet room

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24 Jan

House Extensions

Stanmore - HA7

Enquiry from: Lalita G

Start Date: Immediate

Are you the property owner: Owner of the property Is this for a Residential or Commerial Building: Domestic Type of Current Boiler: Gas Other Forms: 336, 45 Agreed to recieve quotes for selected prod...

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08 Dec

House Extensions

Stanmore - HA7

Enquiry from: Mrs J

Start Date: Immediate

Conversion of a garage into a kitchen

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30 Aug

House Extensions

Stanmore - HA7

Enquiry from: Yugal K

Start Date: Immediate

Customer visited the myhouseextension.co.uk site and submitted an enquiry. Property type: Detached, Work description: Either loft conversion or back extension

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28 Aug

House Extensions

Stanmore - HA7

Enquiry from: Rajen S

Start Date: Immediate

double story side and back extension

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10 May

House Extensions

Stanmore - HA7

Enquiry from: NALIN M

Start Date: 3+ months

SINGLE STOREY SIDE EXTENSION. EXTEND THE KITCHEN AND CREAT A SMALL SHOWER ROOM WITH TOILET AND UTILITY AREA. ALSO PATHWAY FROM BOUNDARY TO FRONT DOOR, AND ALONG FRONT OF THE HOUSE.

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15 Jul

House Extensions

Stanmore - HA7

Enquiry from: Dhiraj S

Start Date: Immediate

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: Yes Do you require Plumbing Work: Yes Do yo...

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23 Feb

House Extensions

Stanmore - HA7

Enquiry from: T S

Start Date: 3+ months

Single room extension 6 metres in length Homeowner Will need assistance with planning permission Plans will need to be drawn up Please contact to appoint

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22 Feb

House Extensions

Stanmore - HA7

Enquiry from: Chander G

Start Date: Less than one month

Side extension 3mx5m please provide build quotes Are you the property owner: Owner of the property Property Type: Semi detached Looking For: Single storey extension Do you have planning permissi...

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FAQs

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 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.

What types of extension are there?

There are many different types of extension. For example, you could install an orangery, flat or pitched roof extension, over-structure extension, single or double storey extension or a glass box extension. Which one of these is most suitable will depend on your existing property.

Should I use concrete or timber footings?

For 2 metre solid fences it’s recommended to use concrete posts to support each panel. For smaller 1 metre fences or for picket fences with gaps between each timber piece you can use timber posts. A fencing contractor will be able to advise you on the best materials from the length and requirements of a new fence.

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Stanmore House extensions installers are rated 4.4 out of 5 based on 15 reviews of 101 pros.
The LeadsDoWork rating and review is an overall rating based on verified reviews and feedback from the customers with House extensions projects that have been connected with House extensions pros to help them. All House extensions contractors All Stanmore House extensions contractors

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