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House extension includes a large range of advantages that makes it simple to see why the extension could be a terrific uptick in the prospective cost of your home in terms of sales. So if you're wanting to build a brand-new home extension but still not encouraged concerning the job, we're right here to assist you. Being completely mindful any type of house building job is generally a heavy financial investment, there's a huge requirement to be set on your decision prior to arranging the commencement of any work. So are house extensions worth it? Below are some of the top advantages used by house extensions to assist you determine if it's the most suitable path for you.

 

What's Associated with Building an Extension?

The steps will vary depending upon the range of your extension, however you can expect some, otherwise all, of the listed below to be included 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 contract (if relevant) to see to it you can do what you intend to do.
  3. Enlisting an architect  to create the plans, considering your expected use (kitchen, restroom, study).
  4. Hiring a competent builder with experience of larger projects.
  5. Calling your insurance coverage company to let them understand of the prepared work ahead of it beginning.
  6. Getting car park permits if needed for your service providers to guarantee they have simple access to your residential building.
  7. Ensuring all planned job drops within allowed allowables.
  8. Clearing the space and excavating if needed, consisting of the elimination of trees.
  9. Building job can start.

 

What is the expense of a house extension in city?

If you're considering including a two floor house extension, after that establishing a budget for this project would certainly be a fantastic method to start. Comparable to a back extension, a two floor extension typically leaves the rest of the structure needing some job and also, due to its dimension, this may suggest the re-development of the whole house - which is why they can be really costly. Several of the various other affecting aspects that can have huge influence on a 2 floor house extension cost includes: your place, the dimension of the construct, complexity of the layout (anything past the typical develop will typically require even more know-how and time), the glazing to be integrated (the a lot more the glass utilized in the job, the more the product price), as well as the team made use of.

Average House extensions cost in Merthyr Tydfil

The regular cost of House extensions are £50,000 in Merthyr Tydfil. 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 2025

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 Merthyr Tydfil, as reported by local LeadsDoWork members.

House extensions installation cost in Merthyr Tydfil 2025

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

House extensions searches in June 2025

House extensions Projects in Merthyr Tydfil in May 2025

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Requests for quotations in Merthyr Tydfil in May 2025

7

Requests for House extensions quotations in Merthyr Tydfil in May 2025. -22% change from April 2025.

20

Requests for House extensions quotations in Mid Glamorgan in May 2025. -33% change from April 2025.

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

House extensions searches in cities and towns near Merthyr Tydfil May 2025

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Merthyr Tydfil

Merthyr Tydfil is the 15th greatest urban area in Wales with a populace of 30,000. It once was the greatest town in Wales but now has only a population density of 502 individuals kilometre squared. If you're trying to find home developments in Merthyr Tydfil, ensure to check quotes from vetted specialists and get the ideal price available.

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Similar Customer Enquiries for House extensions in Merthyr Tydfil

23 Apr

House Extensions

Merthyr Tydfil - CF48

Enquiry from: James H

Start Date: Immediate

Hi, we are looking at buying a 3 bed 2 storey house in merthyr. I was hoping you can give me some type of rough estimate to the cost of possible extensions. I appreciate this Varies on many things but...

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24 Sep

House Extensions

Merthyr Tydfil - CF47

Enquiry from: Dougald M

Start Date: Less than one month

Conversion of 3 x 5.6m attached garage into general purpose living space. Concrete floor needs levelling before adding wooden vinyl. As well as necessary insulation, etc. to replace garage door with U...

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18 Oct

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Merthyr Tydfil - CF47

Enquiry from: Malcolm J

Start Date: Immediate

single storey extention

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14 Sep

House Extensions

Merthyr Tydfil - CF47

Enquiry from: Stefan J

Start Date: Immediate

Add an additional bedroom above an existing single storey extension Are you the property owner: Owner of the property Property Type: Terrace Looking For: Double storey extension Do you have planning p...

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05 Feb

House Extensions

Merthyr Tydfil - CF47

Enquiry from: Abby C

Start Date: Immediate

Homeowner House extension Supplied and installed Please contact to appoint

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28 Jan

House Extensions

Merthyr Tydfil - CF48

Enquiry from: Jarod B

Start Date: Immediate

Are you the property owner: Owner of the property Property Type: Semi detached Looking For: Double storey extension Do you have planning permission: No Would you require assistance to gain this: Y...

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26 Jan

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Merthyr Tydfil - CF47

Enquiry from: Simon P

Start Date: Immediate

Homeowner Double storey extension May need help with plans Supplied and fitted Call to appoint

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17 Jul

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Pontypridd - CF38

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House extension and new garage new drive

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15 Nov

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homeowner extension please call to appoint

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04 Oct

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Porth - CF39

Enquiry from: Beena K

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customer has a extensions & conversions project they are looking to have done, specially they want quotes for house extension. they are unsure of options so would like to discuss with a builder.confir...

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05 Dec

House Extensions

Aberdare - CF44

Enquiry from: Most F

Start Date: Immediate

customer in aberdare areas is looking to do a couple of projects at the moment, and would like quotes for house extension.confirmed interest via email at 05/12/2021 08:51.please call to arrange appoin...

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09 Mar

House Extensions

Tonypandy - CF40

Enquiry from: Lewis R

Start Date: 1 to 3 months

i am looking to build up on my existing single extension. it’s approx 3m wide by 5m deep. are you the property owner: owner of the property looking for: single storey extension do you have planning ...

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08 Mar

House Extensions

Treharris - CF46

Enquiry from: Mike C

Start Date: Immediate

A flat roof garage ,remove about 12 Asbestos sheets (al whole ) and replace with new Corrogated sheets. If you are not available Dean, is there anyone you can recommend plus one or two jobs required...

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02 Mar

House Extensions

Tredegar - NP22

Enquiry from: Charlene B

Start Date: Immediate

are you the property owner: owner have you considered getting your windows replaced to match a new conservatory: no other forms: house extension agreed to receive quotes for selected products: yes pl...

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20 Feb

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Aberdare - CF44

Enquiry from: Paul G

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Vertical extension on top of existing kitchen extension

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10 Dec

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Tonypandy - CF40

Enquiry from: Kyle B

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Double timber frame extension on a semi detached property.

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06 Dec

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Aberdare - CF44

Enquiry from: Gaynor D

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are you the property owner: owner of the property property type: terrace agreed to receive upvc quotes: yes what level of service do you require: supply and fit other forms: kitchen design & installa...

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30 Oct

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Mountain Ash - CF45

Enquiry from: Cl C

Start Date: 1 to 3 months

are you the property owner: owner of the property how many bedrooms does the property have: 3-4 other forms: house extension agreed to receive quotes for selected products: yes please call to appoint

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15 Aug

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Aberdare - CF44

Enquiry from: Irene T

Start Date: Immediate

32 Craig Y Darren, Cwmdare, Aberdare, *** I am interested in an extension to the side of my house to create a larger kitchen and garden room.

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26 Jun

House Extensions

Aberdare - CF44

Enquiry from: Tracy H

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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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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.

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 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.

where to start with a house extension?

Have you decided to improve your property instead of moving? The common problem most homeowners face after deciding to embark on a home extension project is not knowing where to start. In this article we’ll walk you through everything you need to consider and put in place before commencement of your home extension project.

• Is the extension worth it?

Before breaking the bank, you must be sure that the project will add good value to your home. In terms of “value, this is not only limited to the financial gain after disposal of the property, but also several other juicy benefits to be derived from extending your home like an extra living space for the household to spread out and more.

• Do you need a planning permission?

Check with your local authority to determine whether or not you’ll require to submit an application. You can also consult a building expert like an architect for advice.

• What are the building regulation?

Even though planning permission can be dodged, you can not avoid building regulations. These regulations are the set national minimum standards for construction and design which you must comply with to ensure the safety of the individuals in and around it.

• Who will design the extension?

You have to decided whether you’ll hire a professional architect to design the extension or not.

• Who will manage the building work?

If your home extension project is designed and built by a professional company, they’ll be responsible for the management. However, if you decide to use an architect or designed it yourself, you’ll have to hire a main contractor to manage the build.

• How to set the budget?

There are so many factors that can affect the cost of an extension, so it’s better to get the costs from your builder before proceeding.

• Do I need yo inform my home insurance firm?

Absolutely! This is very important as the new extension may affect the rebuilding cost of your property which could have an impact on the policy premium.

• Do I need to inform my neighbours?

It’s very important to discuss your plan with your neighbours before applying for a planning permission and communicate about the concerns they might have.

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