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House Extension in city

House extension features a wide variety of advantages that makes it easy to see why the extension could be a excellent uptick in the prospective price of your residential property in terms of sales. So if you're looking to develop a brand-new house extension but still not persuaded concerning the task, we're right here to help you. Being totally conscious any house building and construction work is normally a hefty investment, there's a huge need to be set on your decision prior to setting up the start of any type of job. So are house extensions worth it? Below are several of the top advantages used by house extensions to help you choose if it's the most appropriate route for you.

 

What's Associated with Adding an Extension?

The actions will differ relying on the scope of your extension, yet you can expect some, otherwise all, of the below to be included when adding an expansion to your home:

 

  1. Obtaining Building Regulations or Planning Permission (if needed as the extension is larger than permitted development).
  2. Checking your leasehold agreement (if suitable) to see to it you can do what you want to do.
  3. Getting an architect  to create the plans, considering your planned usage ( cooking area, shower room, study).
  4. Hiring a competent builder with experience of larger projects.
  5. Contacting your insurance coverage provider to let them recognize of the prepared job ahead of it starting.
  6. Getting auto parking allows if needed for your professionals to guarantee they have easy accessibility to your building.
  7. Seeing to it all planned work falls within permitted allowables.
  8. Clearing up the area and also excavating if needed, including the removal of trees.
  9. Building work can start.

 

What is the expense of a house extension in city?

If you're taking into consideration adding a two storey house extension, after that setting a allocate this project would be a fantastic means to get started. Comparable to a back extension, a 2 storey extension usually leaves the rest of the structure requiring some job and also, as a result of its size, this might indicate the re-development of the entire house - which is why they can be extremely costly. A few of the other influencing elements that can have large impact on a 2 storey house extension cost includes: your place, the size of the develop, complexity of the layout (anything beyond the typical construct will typically require even more experience and time), the glazing to be incorporated (the much more the glass utilized in the job, the more the product expense), along with the team used.

Average House extensions cost in Balham

The regular cost of House extensions are £65,000 in Balham. Costs vary based upon the materials and the company picked. The upper price range can be as high as £96,334. The material costs are in most cases around£10,500.

Average price per House extensions job in 2025

Avg. price low

Avg. price low
£35,334

Avg. price

Avg. price
£65,000

Avg. price high

Avg. price high
£96,334

£96900

£72675

£48450

£24225

£0

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

House extensions installation cost in Balham 2025

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

House extensions searches in April 2025

House extensions Projects in Balham in March 2025

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Requests for quotations in Balham in March 2025

0

Requests for House extensions quotations in Balham in March 2025. 0% change from February 2025.

1,000

Requests for House extensions quotations in London County in March 2025. 14% change from February 2025.

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

House extensions searches in cities and towns near Balham March 2025

Balham

Balham is a district in south London in the London Borough of Wandsworth. The settlement appears within the Domesday Book as Belgeham. Bal signifies ‘rounded enclosure’ and ham a homestead, village or river enclosure. The area has been settled since Saxon times, and Balham Hill and Balham High Road follow the line of the Roman road Stane Street to Chichester.

Balham encompasses the A24 north of Tooting Bec as well as the roads coming off it. The southern part of Balham which is near Tooting Bec features a block of 1930s Art Deco flats referred to as Du Cane Court. There's also the Heaver Estate which is in Tooting, which comprises substantial homes. It was built inside the grounds of the old Bedford Hill House by nearby Victorian builder Alfred Heaver.

Balham is located in between 4 south London commons, namely Clapham Common to the north, Wandsworth Common towards the west, Tooting Graveney Common towards the south as well as the connecting Tooting Bec to the east.

In WW2, on 14th October 1940, Balham tube station was badly affected by air raids on London. People sheltered inside the tube station through the raids, but a bomb fell in the High Road and through the rooftop of the Underground station, bursting a water and gas mains and killing around 64 people. Ian McEwan describes the event in his novel ‘Atonement’, published in 2001.

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House extensions pros in Balham

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.

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...

LW Building Service

2 review(s)
Based: in London, SE20 8AG

Latest review

Rosa S., SE20
3

House Extensions in London

I have not yet finalised quotation

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 Balham

16 Mar

House Extensions

London - SW11

Enquiry from: Will E

Start Date: Immediate

Extend out back, make kitchen/living space with bifold doors onto garden. Extend on top of this and add a bathroom. Please would you mind giving me a quick call tomorrow to discuss?

Post a similar request >

21 Feb

House Extensions

London - SW11

Enquiry from: Will E

Start Date: Immediate

Extend out back, make kitchen/living space with bifold doors onto garden. Extend on top of this and add a bathroom. Please would you mind giving me a quick call tomorrow to discuss?

Post a similar request >

16 Aug

House Extensions

London - SW12

Enquiry from: Lucy P

Start Date: Immediate

rear extension, 3.12 depth x 3.69 width, velux windows, bi-fold doors customer is currently in the process of looking for quotes to add a single storey extension to their property. are you the proper...

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10 Sep

House Extensions

London - SW12

Enquiry from: Alistair F

Start Date: Less than one month

extension of current dweilling to the front to acomodate a kitchen as well as some internal work (removal of walls) and prep for install of kitchen, Customer is currently in the process of looking for...

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22 Oct

House Extensions

London - SW12

Enquiry from: Heena P

Start Date: 1 to 3 months

Homeowner Please contact to appoint Are you the property owner: Owner of the property Property Type: Terrace Do you have planning permission: Yes Looking For: Single storey extension Do you have plan...

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16 Aug

House Extensions

London - SW12

Enquiry from: Karen O

Start Date: 1 to 3 months

Homeowner Please contact to appoint

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10 Apr

House Extensions

London - SW12

Enquiry from: Stephen H

Start Date: Immediate

Partial infill extension to side return. Are you the property owner: Relative of Owner Property Type: Terrace Do you have planning permission: Yes Do you have plans drawn up: Yes Do you require Plumb...

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08 Feb

House Extensions

London - SW12

Enquiry from: Gareth B

Start Date: Immediate

2 story extention 20ft by 11ft

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29 Jan

House Extensions

London - SW4

Enquiry from: Edward D

Start Date: 1 to 3 months

Are you the property owner: Owner of the property Property Type: Terrace Other Forms: 18, 92, 45 Agreed to recieve quotes for selected products: Yes Please call to appoint

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15 Oct

House Extensions

London - SW11

Enquiry from: Anna C

Start Date: 1 to 3 months

Are you the property owner: Owner Have you considered getting your windows replaced to match a new conservatory: Yes How many windows are you looking for: 3 Other Forms: 45 Agreed to recieve quotes f...

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07 Aug

House Extensions

London - SW11

Enquiry from: Spencer K

Start Date: 1 to 3 months

Are you the property owner: Owner of the property Property Type: Terrace Looking For: Single storey extension Do you have planning permission: No Do you have plans drawn up: No Do you require Plumbing...

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19 Jun

House Extensions

London - SW11

Enquiry from: Nenad L

Start Date: Immediate

Estimate for house extention and refurbishment of the house.

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05 Jun

House Extensions

London - SW11

Enquiry from: Terry L

Start Date: Immediate

A window to be made in the bathroom Are you the property owner: Owner of the property Property Type: Other Do you have planning permission: No Do you have plans drawn up: No Do you require Plumbing Wo...

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10 Mar

House Extensions

London - SW11

Enquiry from: Ron K

Start Date: Less than one month

Ground floor single storey extension to kitchen only. 4.7m x 5.2 including extending into side return. Customer is currently in the process of looking for quotes to add a Single storey extension to ...

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15 Aug

House Extensions

London - SW11

Enquiry from: C

Start Date: Immediate

Hi there I have had an offer accepted on a terrace property in Kitsbury Road in Berkhamsted. there were previous plans drawn up and permission granted which has now lapsed for 9 kitsbury road. Singl...

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02 Aug

House Extensions

London - SW11

Enquiry from: E

Start Date: Immediate

To provide a window in the bathroom

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26 May

House Extensions

London - SW4

Enquiry from: C

Start Date: Immediate

Single storey, flat roof. Dimensions 6 m X 4.5 m.

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18 May

House Extensions

London - SW11

Enquiry from: Patricia R

Start Date: Immediate

I would like a quote for building a one room extension to a ground floor flat in Battersea. The new room, to be used as a bedroom, will be approximately 3m x 3m. One of the walls will have a windo...

Post a similar request >

09 Nov

House Extensions

London - SW4

Enquiry from: Ting Le D

Start Date: Immediate

Customer visited the myhouseextension.co.uk site and submitted an enquiry. Property type: Terrace, Work description: Side return extension plus potentially a little work making basement usable. Are ...

Post a similar request >

05 Nov

House Extensions

London - SW12

Enquiry from: Kerrie K

Start Date: 3+ months

House extension Extend ground floor 1 bed flat out the back into our garden. Approx 4m out and 3m across. Ideally we would like a pitched roof but we would be interested in seeing the price differenc...

Post a similar request >

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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 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 long do house extensions take?

If you’re about to start your house extension project and wondering how long it’ll take to complete, you’re not alone! This is one of the most common questions that’s asked by homeowners in the UK and across the globe. However, there’s no single precise answer for this as there are multiple factors that’ll affect the length of time it’ll take to complete your home extension. These factors include the size of the construction work as well as whether you’re planning to live in the house after completion or otherwise.

For a single extension, the length of time it’ll take to complete the home extension is normally up to 3 months. So let’s break this down:

As you would have expected, the first step to be taken is the preparation of the site. You start by digging out the footing and preparing the foundation which should take about 2 weeks. This is then followed by the damp course installation as well as the fitting of any drains needed around the extension which will also take a further 2 weeks.

The 5th week will be for the construction of the external walls as well as putting the blockwork in place for the provision of the cavity wall insulation. A further 2 weeks after this, will be dedicated to the installation of the roof structure and the internal walls.

It’s at this junction that you’ll call on your weather proof installer to fit in your uPVC windows and doors. Once done, the gas fitters and electricians will have to be on site to connect power to your new extension building. Subsequently, this will be followed by internal wall plastering as well as breaking through your main house. Once the plaster is dried, decorations completed and all the required furniture and units installed, the extension is ready for use.

Can an extension add value to my home?

Yes. Most extensions will add substantial value to your home, and you may find that the extension adds more value than it cost. However, it’s important to be sure that the home remains balanced. Extending your garage and leaving your property with no parking spaces, for example, may impact your ability to sell.

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