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House Extension in city

House extension comes with a wide variety of benefits that makes it easy to see why the extension could be a terrific uptick in the possible cost of your home in terms of sales. So if you're seeking to develop a brand-new residence extension however still not convinced concerning the project, we're below to assist you. Being fully conscious any type of house building job is generally a hefty financial investment, there's a big need to be set on your decision before arranging the start of any kind of job. So are house extensions worth it? Below are some of the top benefits used by house extensions to assist you make a decision if it's one of the most ideal course for you.

 

What's Associated with Building an Extension?

The actions will differ relying on the scope of your extension, but you can anticipate some, otherwise all, of the listed below to be entailed when adding an extension to your house:

 

  1. Acquiring Building Regulations or Planning Permission (if needed as the extension is larger than permitted development).
  2. Examining your leasehold contract (if appropriate) to see to it you can do what you wish to do.
  3. Employing an architect  to prepare the plans, considering your expected usage ( kitchen area, washroom, study).
  4. Hiring a competent builder with experience of larger projects.
  5. Calling your insurance provider to let them recognize of the planned job ahead of it beginning.
  6. Acquiring parking allows if required for your service providers to ensure they have very easy accessibility to your residential building.
  7. Seeing to it all prepared work falls within permitted allowables.
  8. Clearing the area and also excavating if required, including the removal of trees.
  9. Structure work can start.

 

What is the price of a house extension in city?

If you're thinking about including a 2 floor house extension, after that establishing a budget for this task would certainly be a excellent way to get going. Similar to a back extension, a 2 storey extension generally leaves the remainder of the building requiring some work and also, because of its size, this may indicate the re-development of the entire house - which is why they can be very pricey. Several of the various other affecting elements that can have large effect on a 2 storey house extension price includes: your location, the dimension of the develop, complexity of the style (anything past the conventional build will normally call for more experience and time), the glazing to be included (the much more the glass used in the project, the much more the product price), in addition to the group made use of.

Average House extensions cost in Merton

The regular cost of House extensions are £65,000 in Merton. 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 Merton, as reported by local LeadsDoWork members.

House extensions installation cost in Merton 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 Merton in March 2025

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Requests for quotations in Merton in March 2025

0

Requests for House extensions quotations in Merton 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 Merton March 2025

Merton

The London Borough of Merton is a borough in south-west London, England. The borough was formed under the London Government Act 1963 in 1965 by the merger of the Municipal Borough of Mitcham, the Municipal Borough of Wimbledon along with the Merton and Morden Urban District, all formerly inside Surrey. The borough derives its name from the historic parish of Merton, which was centred on the location now called South Wimbledon. The local authority is Merton London Borough Council.

As outlined by population estimates made in the middle of 2014, the borough has a permanent population of about 203515 individuals. The borough is also served by several London Tramlink stops from Wimbledon, which goes to Croydon, New Addington, Elmers End and Beckenham. It is the only London Borough which has tube, rail and tram services.

The main industrial centres in Merton are Mitcham, Morden and Wimbledon, of which Wimbledon is the largest. Other smaller centres include Raynes Park, Colliers Wood, South Wimbledon, Wimbledon Park and Pollards Hill. Each year, Wimbledon, one of the 4 tennis Grand Slam tournaments, takes place at the All England Lawn Tennis and Croquet Club in Church Road Wimbledon. The occasion takes place over a fortnight at the end of June and start of July and it's the biggest annual sporting event to take place in the UK, attracting more than 200000 visitors during the Wimbledon fortnight.

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House extensions pros in Merton

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...

Tectra Partnership Ltd

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

Latest review

Deepak S., KT10
5

House Extensions in Esher

excellent communication

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 Merton

15 Apr

House Extensions

London - SW19

Enquiry from: Intisar C

Start Date: Immediate

customer in london areas is looking to do a couple of projects at the moment, and would like quotes for house extension.confirmed interest via sms and email at 15/04/2025 17:16.please call to arrange ...

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09 Apr

House Extensions

London - SW16

Enquiry from: Andrea C

Start Date: Immediate

Customer is looking for House Extension quotes. They are unsure of options so would like to discuss. Confirmed interest via SMS/ Customer lives in London area Please call to arrange an appointment

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06 Mar

House Extensions

Morden - SM4

Enquiry from: Paul R

Start Date: Immediate

Customer in Morden area made an enquiry for House Extension online. Please call to arrange an appointment to discuss options

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22 Sep

House Extensions

Thornton Heath - CR7

Enquiry from: Rehana R

Start Date: Immediate

rear extension for kitchen and turn present kitchen into shower room are you the property owner: owner of the property property type: terrace looking for: single storey extension do you have planning ...

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27 Aug

House Extensions

Morden - SM4

Enquiry from: Nadine L

Start Date: Immediate

customer made an online enquiry for house extension and confirmed on sms and email they would like a call with a builder to discuss prices.please call to arrange an appointment to quote. are you the p...

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15 Dec

House Extensions

London - SW19

Enquiry from: Alex P

Start Date: Less than one month

House extensions Lead House extensions Lead

mr requested quotes for house extension from a builder around london. they are considering a couple of projects at the moment.call anytime to arrange appointment to discuss. the information below is w...

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11 Sep

House Extensions

Sutton - SM3

Enquiry from: JM M

Start Date: Immediate

customer made an enquiry for house extension and confirmed on the quotatis site they would like quotes from a builder.customer lives in the sutton area and would like a call to discuss options.see bel...

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20 Dec

House Extensions

Thornton Heath - CR7

Enquiry from: Jennifer D

Start Date: Immediate

I'm thinking of extending my kitchen into my garden space by 3 meters.

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16 Dec

House Extensions

London - SW19

Enquiry from: Grace C

Start Date: Immediate

6x5.5m kitchen extension using sip

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07 Sep

House Extensions

Mitcham - CR4

Enquiry from: Alex B

Start Date: Less than one month

full kitchen extension, with bi-fold doors in to the garden. medium range finish with built in cabinets and an island. are you the property owner: owner of the property property type: terrace looking ...

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25 Aug

House Extensions

London - SW18

Enquiry from: Len D

Start Date: Immediate

a lean to extension 3000mmx 6 000m i have the plans drawn up customer is currently in the process of looking for quotes to add a single storey extension to their property. are you the property owner:...

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12 Aug

House Extensions

Mitcham - CR4

Enquiry from: Alex B

Start Date: Less than one month

full kitchen extension, with bi-fold doors in to the garden. medium range finish with built in cabinets and an island. are you the property owner: owner of the property property type: terrace looking ...

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08 Jun

House Extensions

London - SW20

Enquiry from: Priya P

Start Date: Immediate

We want to take off the wall in between the kitchen and dinning area and extend it further into garden by 4 meters

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17 May

House Extensions

London - SW19

Enquiry from: Mira M

Start Date: Immediate

Customer made enquiry for House Extension quotes online. Confirmed via SMS at 07:19 Homeowner lives in London area. Please call to arrange appointment

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02 May

House Extensions

Morden - SM4

Enquiry from: Mohammad A

Start Date: Immediate

customer made an online enquiry for house extension and confirmed on email they would like a call with a builder to discuss prices.please call to arrange an appointment to quote. are you the property ...

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21 Apr

House Extensions

London - SW17

Enquiry from: Daniel N

Start Date: 1 to 3 months

customer in london areas is looking to do a couple of projects at the moment, and would like quotes for house extension.confirmed interest via sms and email at 21/04/2021 14:04.please call to arrange ...

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19 Mar

House Extensions

London - SW16

Enquiry from: Mr R

Start Date: Immediate

i have a three bedroom mid terrace house and i wish to rent or let the upstairs which is one bedroom .frontroom .kitchen.bathroom and i want to make plqnning permission

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17 Mar

House Extensions

London - SW16

Enquiry from: Lincoln M

Start Date: Immediate

customer in london areas is looking to do a couple of projects at the moment, and would like quotes for house extension.confirmed interest via telephone, sms and email at 17/03/2021 14:25.please call ...

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13 Mar

House Extensions

London - SW16

Enquiry from: Michael R

Start Date: Immediate

i want to let or rent upstairs which is a one bedroom .kitchen .bathroom front room. and i will be living downstairs there is only one boiler and electricity for the whole house i would like a quote f...

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10 Feb

House Extensions

Morden - SM4

Enquiry from: Kishnasamy S

Start Date: Immediate

are you the property owner: owner have you considered getting your windows replaced to match a new conservatory: no other forms: kitchen design & installation, house extension, gas boiler replacement...

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FAQs

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.

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.

how much is a double house extension?

A double house extension is basically a construction to any aspect of your house that elevates up to offer two floors of space. It can be structured to suit your existing home in two storeys or as a side wing on a taller property. If you’re considering building a double house extension, then estimating the cost is a very important task to do before commencing the project. In this article, we’ll give you an idea of the cost of a double house extension so you can estimate yours accordingly.

The double house extension cost depends on several factors that’s specific to your home as well as your design choice. These includes:

• Location of your property. Places like London and the southeast will generally cost more than the other regions due to higher demands.

• Accessibility of the site. The ease of your site’s accessibility also plays a key role in the price.

• Size of the extension. The more the extension’s size in footprint and square metres, the higher the possible costs.

• Materials used in making the roof as well as the complexity of the roof design.

• Your choice of finishing. These includes flooring window and door frames, glazing, underfloor heating and roof lights.

• Your property’s soil type. Different types of soil requires varying treatments as well as materials to develop solid foundations.

Constructing a double house extension is a quite simple build in terms of technicality when its to the side or rear of your house as this can also help you save some money. Generally, considerably expanding your home’s space by building a double house extension will cost within the range of £1,500 per m2 to about £2,800 per m2.

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.

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