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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 May 2025

House extensions Projects in Merthyr Tydfil in April 2025

658

Requests for quotations in Merthyr Tydfil in April 2025

7

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

20

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

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

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

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Requests for quotations in Pontypridd in April 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

House Extensions

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

Enquiry from: Justin S

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House extension and new garage new drive

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15 Nov

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Tredegar - NP22

Enquiry from: Sephiwe B

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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

House Extensions

Aberdare - CF44

Enquiry from: Paul G

Start Date: Immediate

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

House Extensions

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 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.

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.

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.
how much value does an extension add to your house?

Are you interested in extending your home to create more living space? If yes, then you’d probably want to know how much value it can add to your property in order to compare the building costs to the potential value gain. Well, as long as you know what you’re doing, your house doesn’t necessarily have to be a money pit. So what are your options when talking about home extensions and what’s the associated value to be gained?

• Bathroom Extensions

Although you should have it in mind that bathroom extensions isn’t usually that cheap, but once done, it can increase the value of a standard UK house within the range of £12,000 to £15,000. Meanwhile the finishing cost of a bathroom can range from £2,500 to £7,000.

• Single or Double Storey Extensions

Single storey extensions are always huge when it comes to increasing the value of your home - giving about 4 to 7 percent increase. If it goes that far, then literally nothing beats a full spectrum, double storey extension which can give up to 11 percent increase in the value of a property - equalling about a whooping £33,000 for a standard home in the UK.

• Conservatory Extension

With conservatories becoming more and more popular in the UK due to the weather conditions, several buyers are now including it’s availability as part of the criteria for purchasing a house. Wonder why? This is simply because everyone wants to enjoy their garden all throughout the year. As a result of this high demand, adding this type of extension to your house can go a long way to increase it’s value. However, it’s very important to incorporate high quality materials during construction. With glass conservatories offering, on the average, up to £5,000 increase in value, the cheaper PVC alternative offers much less value and can also deter potential buyers.

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