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House Extension in city

House extension comes with a vast array of advantages that makes it very easy to see why the extension could be a fantastic uptick in the potential price of your home in terms of sales. So if you're seeking to construct a brand-new home extension however still not convinced concerning the task, we're below to aid you. Being totally mindful any house building work is generally a heavy investment, there's a huge demand to be set on your choice before arranging the commencement of any type of work. So are house extensions worth it? Below are some of the top benefits used by house extensions to help you choose if it's the most suitable route for you.

 

What's Associated with Adding an Extension?

The actions will certainly differ relying on the extent of your extension, but you can expect some, if not all, of the listed below to be involved when adding an extension to your home:

 

  1. Obtaining Building Regulations or Planning Permission (if needed as the extension is larger than permitted development).
  2. Examining your leasehold agreement (if suitable) to make certain you can do what you want to do.
  3. Enlisting an architect  to prepare the plans, considering your planned use ( cooking area, bathroom, study).
  4. Hiring a competent builder with experience of larger projects.
  5. Contacting your insurance policy supplier to let them know of the prepared work ahead of it starting.
  6. Getting parking permits if needed for your contractors to guarantee they have easy access to your building.
  7. Making sure all intended job drops within permitted allowables.
  8. Cleaning the space and also digging deep into if necessary, including the removal of trees.
  9. Building work can start.

 

What is the cost of a house extension in city?

If you're thinking about adding a 2 storey house extension, then establishing a allocate this project would be a excellent method to begin. Comparable to a back extension, a two storey extension typically leaves the remainder of the building needing some job as well as, as a result of its dimension, this might suggest the re-development of the whole house - which is why they can be extremely expensive. Several of the various other influencing factors that can have huge influence on a 2 floor house extension price consists of: your location, the size of the develop, complexity of the design (anything beyond the typical develop will generally call for even more know-how and also time), the glazing to be integrated (the a lot more the glass utilized in the task, the much more the product cost), as well as the team used.

Average House extensions cost in Cardiff

The regular cost of House extensions are £50,000 in Cardiff. Costs vary based upon the materials and the company picked. The upper price range can be as high as £68,000. The material costs are in most cases around£10,500.

Average price per House extensions job in 2026

Avg. price low

Avg. price low
£42,000

Avg. price

Avg. price
£50,000

Avg. price high

Avg. price high
£68,000

£68500

£51375

£34250

£17125

£0

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

House extensions installation cost in Cardiff 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 Cardiff in August 2026

12,978

Requests for quotations in Cardiff in August 2026

50

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

50

Requests for House extensions quotations in South Glamorgan in August 2026. 0% change from July 2026.

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

House extensions searches in cities and towns near Cardiff August 2026

50

Requests for quotations in Cardiff in August 2026

10

Requests for quotations in Barry in August 2026

10

Requests for quotations in Pontypridd in August 2026

10

Requests for quotations in Bridgend in August 2026

7

Requests for quotations in Caerphilly in August 2026

Cardiff

The capital and greatest city of Wales is situated in the classic region of Glamorgan, with a population of practically 350,000. The city is still a significant traveller location with more than 18 million visitors in 2010. Being a capital city, Cardiff's property selling prices seem to be more than the majority of Wales, therefore it's necessary to preserve this value by employing vetted trades-people for your home improvement work.

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Similar Customer Enquiries for House extensions in Cardiff

11 Feb

House Extensions

Cardiff - CF10

Enquiry from: Reuben M

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How much it cost for house extension

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21 Feb

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Cardiff - CF14

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customer in cardiff area has requested that we arrange quotes for their house extension project.mrs are considering various options and would like to discuss with a builder directly.please call to dis...

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21 Feb

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Build Extends kitechen Iput pictures hope you're having them

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02 Sep

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Cardiff - CF5

Enquiry from: Natalie K

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customer in cardiff area has requested that we arrange quotes for their house extension project.they are considering various options and would like to discuss with a builder directly.please call to di...

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06 Mar

House Extensions

Cardiff - CF5

Enquiry from: Mandie D

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utility room extension to kitchen are you the property owner: owner of the property property type: semi detached looking for: double storey extension do you have planning permission: no do you have pl...

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16 Feb

House Extensions

Cardiff - CF11

Enquiry from: Lama M

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Garden Flat of around 55sqm overall. the overall height of the garden structure to be maximum of 2.5m. to the facade two glased doors of around 0.9m and one 2.3m wide window. the roof to include thr...

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12 Feb

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Cardiff - CF14

Enquiry from: Frances B

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

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30 Nov

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Cardiff - CF5

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

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23 Sep

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Cardiff - CF3

Enquiry from: Shakila M

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

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05 Jul

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Cardiff - CF5

Enquiry from: Ramesh P

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customer in cardiff area has requested that we arrange quotes for their house extension project.mr are considering various options and would like to discuss with a builder directly.please call to disc...

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12 May

House Extensions

Cardiff - CF14

Enquiry from: Stephanie W

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

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19 Mar

House Extensions

Cardiff - CF5

Enquiry from: Rhiannon S

Start Date: Less than one month

extended current smaller extension to include open plan kitchen / diner. are you the property owner: owner of the property looking for: single storey extension property type: semi detached do you have...

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14 Jan

House Extensions

Cardiff - CF14

Enquiry from: Christopher E

Start Date: Immediate

are you the property owner: owner of the property is this for a residential or commerial building: domestic other forms: house extension, building maintenance agreed to receive quotes for selected pr...

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11 Jan

House Extensions

Cardiff - CF14

Enquiry from: Dave W

Start Date: Immediate

extension to rear of property in void space area next to existing extension of 3.4 meters by 3 meters so only need wall 3.4 meters long and lean to roof and existing patio doors moved to near extensio...

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09 Dec

House Extensions

Cardiff - CF14

Enquiry from: Piotr J

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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23 Nov

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Cardiff - CF14

Enquiry from: Jeff L

Start Date: Immediate

are you the property owner: owner of the property other forms: house extension agreed to receive quotes for selected products: yes please call to appoint

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17 Oct

House Extensions

Cardiff - CF14

Enquiry from: Jon L

Start Date: Immediate

are you the property owner: owner of the property is this for a residential or commerial building: domestic other forms: house extension agreed to receive quotes for selected products: yes please cal...

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18 Aug

House Extensions

Cardiff - CF24

Enquiry from: Dan P

Start Date: Less than one month

2 metre squared enclosed porch. are you the property owner: owner of the property property type: semi detached looking for: single storey extension do you have planning permission: no do you have plan...

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15 Aug

House Extensions

Cardiff - CF14

Enquiry from: Edward M

Start Date: Immediate

Single story mono pitch roof

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11 Aug

House Extensions

Cardiff - CF23

Enquiry from: Rhian B

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property type: terraced 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 property to...

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FAQs

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.

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.

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.

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.

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