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House Extension in city

House extension features a wide range of benefits that makes it easy to see why the extension could be a fantastic uptick in the prospective price of your home in regards to sales. So if you're seeking to develop a brand-new house extension but still not encouraged regarding the job, we're here to assist you. Being completely mindful any kind of home construction job is normally a hefty financial investment, there's a massive need to be set on your decision before scheduling the commencement of any job. So are house extensions worth it? Below are some of the leading benefits used by house extensions to aid you make a decision if it's the most suitable route for you.

 

What's Involved in Building an Extension?

The steps will certainly differ depending upon the scope of your extension, but you can anticipate some, if not all, of the listed below to be included when including an extension to your home:

 

  1. Obtaining Building Regulations or Planning Permission (if needed as the extension is larger than permitted development).
  2. Inspecting your leasehold contract (if suitable) to ensure you can do what you intend to do.
  3. Employing an architect  to draw up the plans, considering your intended usage ( kitchen area, bathroom, research study).
  4. Hiring a competent builder with experience of larger projects.
  5. Calling your insurance coverage service provider to let them know of the intended work ahead of it starting.
  6. Getting vehicle parking allows if needed for your specialists to guarantee they have easy accessibility to your property.
  7. Ensuring all planned job drops within permitted allowables.
  8. Clearing up the area as well as excavating if needed, consisting of the elimination of trees.
  9. Structure job can begin.

 

What is the price of a house extension in city?

If you're taking into consideration adding a two storey house extension, after that establishing a budget for this project would be a wonderful means to get going. Similar to a rear extension, a two storey extension usually leaves the remainder of the structure requiring some job and also, due to its size, this might indicate the re-development of the whole house - which is why they can be extremely pricey. Several of the various other influencing aspects that can have huge effect on a two storey house extension expense includes: your area, the dimension of the build, complexity of the design (anything beyond the common construct will typically need even more know-how and time), the glazing to be incorporated (the more the glass made use of in the task, the extra the product cost), as well as the group made use of.

Average House extensions cost in Cobham

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

House extensions installation cost in Cobham 2026

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

House extensions searches in July 2026

House extensions Projects in Cobham in June 2026

719

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3

Requests for House extensions quotations in Cobham in June 2026. -40% change from May 2026.

180

Requests for House extensions quotations in Surrey in June 2026. -25% change from May 2026.

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

House extensions searches in cities and towns near Cobham June 2026

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Cobham

Cobham is a village in the Borough of Elmbridge in Surrey, England. It is situated about 17 miles (27 km) south-west of London and 10 miles (16 km) northeast of Guildford around the River Mole. Cobham covers an area of about 3.2 square miles. In line with the 2011 Census, the town features a permanent population of about 9739 individuals. Historically, Cobham comprised two separate communities, Street Cobham and Church Cobham. The former lay on the road to London, and the building now referred to as the Cobham Exchange was formerly a coaching inn. The community of Church Cobham expanded around St. Andrew's Church, which dates back to the 12th century. Although considerably altered and extended during the 1800s, the church preserves a Norman tower and is a Grade I listed building, which is the highest architectural category. The River Mole provides the scene for Cobham's most famous landmark, which is the red brick water mill. It was constructed in the latter part of the 1700s, and it was once a part of a considerably bigger complex. It stands on the site of earlier mills dating back to the Middle Ages. The mill continued to be in use till 1928, when it became uneconomical to continue operating. Since its closure, it has been applied as a storehouse. The town offers a lot of opportunities for sport and leisure activities. Painshill Park is nearby and Silvermere golf course is located in Redhill Road on the north side of the A3. Cobham has four football clubs: Cobham F.C., Mole Valley SCR F.C., Cobham United Football Club and Cobham Town F.C. Cobham also includes a cricket club, Cobham Avorians, formed in 1928. For all of your home upgrades, ensure that you utilise trustworthy specialists in Cobham to ensure you get the most effective quality.

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House extensions pros in Cobham

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 Cobham

03 Aug

House Extensions

Cobham - KT11

Enquiry from: Richard F

Start Date: Less than one month

We require a double two door brick garage 5.5 w by 6 metre length Roof height 4.2 metre Roof to be tiled Wooden doors Ground works already done so no need to include that in your quote Cust...

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31 Mar

House Extensions

Cobham - KT11

Enquiry from: Lindsey C

Start Date: Immediate

Single story extension with pitched roof. 2 skykights. Steel.beam. Bifold doors. Floor screeded. Plasterboard to ceilinv. Customer is currently in the process of looking for quotes to add a Single st...

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03 Nov

House Extensions

Cobham - KT11

Enquiry from: Stephen W

Start Date: Immediate

Submit your free quote for rated tradespeople

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17 Oct

House Extensions

Cobham - KT11

Enquiry from: Stephen W

Start Date: Immediate

Submit your free quote for rated tradespeople

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29 Jul

House Extensions

Cobham - KT11

Enquiry from: Rob P

Start Date: Immediate

Are you the property owner: Owner of the property Property Type: Semi detached Looking For: Single storey extension Do you have planning permission: Yes Do you have plans drawn up: Yes Do you require ...

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19 Feb

House Extensions

Cobham - KT11

Enquiry from: Shireen M

Start Date: Immediate

Double storey extension . We need some downstairs space and some upstairs space.

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14 Dec

House Extensions

Cobham - KT11

Enquiry from: Chris B

Start Date: Immediate

Home owner Two storey extension to rear of property, pitched roof, brick exterior. 4 metres out and 7 metres long (total 56 sq m). Cost to include for basic finish (plastered walls, electrics and c...

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29 Nov

House Extensions

Cobham - KT11

Enquiry from: Chris B

Start Date: Immediate

two storey extension to rear of property, pitched roof, brick exterior. 4 metres out and 7 metres long (total 56 sq m). Cost to include for basic finish (plastered walls, electrics and central heating...

Post a similar request >

25 Jul

House Extensions

Cobham - KT11

Enquiry from: Bronwyn F

Start Date: Immediate

Are you the property owner: Owner of the property Property Type: Detached Looking For: Single storey extension Do you have planning permission: No Would you require assistance to gain this: Yes D...

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16 Feb

House Extensions

Cobham - KT11

Enquiry from: James G

Start Date: Immediate

Home Owner Build Quotes Back extension to include new kitchen, bathroom and utility room and open plan dining Planning Assistance Required Please Call to Appoint

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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.
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.

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.

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