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House extension includes a wide range of benefits that makes it very easy to see why the extension could be a fantastic uptick in the possible cost of your residential property in terms of sales. So if you're aiming to construct a brand-new home extension yet still not persuaded regarding the task, we're right here to assist you. Being fully aware any type of home construction work is normally a hefty investment, there's a massive demand to be set on your decision before setting up the start of any job. So are house extensions worth it? Below are a few of the top benefits used by house extensions to help you determine if it's the most appropriate path for you.

 

What's Involved in Including an Extension?

The actions will certainly vary depending on the scope of your extension, but you can expect some, if not all, of the below to be entailed when including an extension to your home:

 

  1. Acquiring Building Regulations or Planning Permission (if called for as the extension is larger than permitted development).
  2. Inspecting your leasehold agreement (if applicable) to make sure you can do what you intend to do.
  3. Getting an architect  to draw up the plans, considering your intended usage ( kitchen area, restroom, research study).
  4. Hiring a competent builder with experience of larger projects.
  5. Calling your insurance coverage carrier to let them recognize of the prepared work ahead of it starting.
  6. Acquiring car parking allows if needed for your service providers to guarantee they have easy accessibility to your property.
  7. Making sure all intended work falls within permitted allowables.
  8. Clearing up the area as well as excavating if required, consisting of the elimination of trees.
  9. Building job can start.

 

What is the cost of a house extension in city?

If you're considering adding a 2 floor house extension, after that setting a allocate this task would be a excellent means to get going. Comparable to a back extension, a 2 floor extension generally leaves the remainder of the structure needing some work as well as, as a result of its size, this might indicate the re-development of the whole house - which is why they can be extremely expensive. Several of the various other affecting aspects that can have big impact on a two floor house extension price consists of: your area, the dimension of the build, intricacy of the layout (anything beyond the standard build will normally require even more knowledge as well as time), the glazing to be integrated (the a lot more the glass used in the job, the much more the product price), as well as the team used.

Average House extensions cost in Pembrokeshire

The regular cost of House extensions are £50,000 in Pembrokeshire. 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 Pembrokeshire, as reported by local LeadsDoWork members.

House extensions installation cost in Pembrokeshire 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 Pembrokeshire in March 2025

2,849

Requests for quotations in Pembrokeshire in March 2025

7

Requests for House extensions quotations in Pembrokeshire in March 2025. -22% change from February 2025.

177

Requests for House extensions quotations in Wales in March 2025. -19% change from February 2025.

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

House extensions searches in cities and towns near Pembrokeshire March 2025

House extensions near you

Pembrokeshire

Pembrokeshire possesses the fifth largest land area of all Welsh regions and carries a population of 122,400. This gives the county a small population density of no more than 74 individuals for each square kilometre. The area is made famous for its shorelines which have been assigned more than 100 honours. Pembrokeshire's county town of Haverfordshire is the most filled within the county with 13,000 and it's found in the heart of the UK's only Coastal National Park. For all property upgrades you're looking at in the Pembrokeshire area, be certain to utilise reputable specialists to get the most out of your investment decision and enhance house value.

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Similar Customer Enquiries for House extensions in Pembrokeshire

27 Nov

House Extensions

Haverfordwest - SA62

Enquiry from: Jon K

Start Date: Immediate

Extension of house Are you the property owner: Owner of the property Looking For: Single storey extension Do you have planning permission: No Do you have plans drawn up: Yes Do you require Plumbing Wo...

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25 Sep

House Extensions

Haverfordwest - SA62

Enquiry from: Colin F

Start Date: 1 to 3 months

modernise house, introduce more natural light. Extend to include a solar room, possibly double height and a west facing balcony/seating area Are you the property owner: Owner of the property Propert...

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22 Sep

House Extensions

Haverfordwest - SA62

Enquiry from: Clive O

Start Date: Immediate

En suite bathroom and walk in wardrobe extension to north side of bungalow. We propose extending the original roof-line. Existing drains are only 2 feet away from property wall.

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17 Aug

House Extensions

Haverfordwest - SA62

Enquiry from: Zoe B

Start Date: Immediate

2 12x12 mobile stable X 6x12 tack room and skids .deluvery and erection cost as well please.

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04 Jul

House Extensions

Haverfordwest - SA62

Enquiry from: Ciro N

Start Date: 3+ months

To build an extra room with shower and toilet

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29 Jun

House Extensions

Haverfordwest - SA62

Enquiry from: Ciro N

Start Date: Immediate

A downstairs bedroom en suite and a front porch

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14 Apr

House Extensions

Haverfordwest - SA62

Enquiry from: Martin H

Start Date: Immediate

Home owner A one floor extension coming off the rear of my bungalow. About 22ft by 12ft. Flat fibre glass roof with window in roof. Both ends to be walled and front is windows and double glass doors....

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24 Jan

House Extensions

Narberth - SA67

Enquiry from: Catherine J

Start Date: Immediate

semi detached property needing concrete garage on side are you the property owner: tenant (with permission) property type: semi detached looking for: single storey extension do you have planning permi...

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29 Aug

House Extensions

Narberth - SA67

Enquiry from: Jonathan C

Start Date: Immediate

Two storey extension 25ft * 15fr with roof terrace above (so flat roof)

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26 Apr

House Extensions

Pembroke Dock - SA72

Enquiry from: Denton C

Start Date: Immediate

I require a garage for off-street parking. Approx Dimensions of space available Wide 8.5m, Depth 4.5m and heigth 2.5m. Need to have agarage doors for locking off the house and a back door in the gara...

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21 Feb

House Extensions

Fishguard - SA65

Enquiry from: Geoffrey B

Start Date: Immediate

2 Dwrbach Cottages Drwbach

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18 Mar

House Extensions

Milford Haven - SA73

Enquiry from: Kevin D

Start Date: Immediate

Double glazed porch, 140cm x 140cm. Tiled pitched roof. Door with lock. Are you the property owner: Owner of the property Do you have planning permission: No What material are you looking for: uPVC ...

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14 Mar

House Extensions

Milford Haven - SA73

Enquiry from: Kevin D

Start Date: Immediate

Double glazed porch, 140cm x 140cm. Tiled pitched roof. Door with lock. Are you the property owner: Owner of the property Do you have planning permission: No What material are you looking for: uPVC ...

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15 Jan

House Extensions

Fishguard - SA65

Enquiry from: Alex B

Start Date: Immediate

1.2 metre extension on ground floor. Large dormer window on first floor. Planning permission has been granted. Are you the property owner: Owner of the property Property Type: Detached Looking For: ...

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29 Dec

House Extensions

Pembroke - SA71

Enquiry from: Sarah S

Start Date: Immediate

Extension to rear of property, single storey, new kitchen to be fitted. Removal of an internal wall, rsj required. New doorway to be made to lead to a utility area, plumbing etc required. Are you th...

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17 Sep

House Extensions

Milford Haven - SA73

Enquiry from: Brendan L

Start Date: 1 to 3 months

Replace existing single storey breeze block attached garage with two storey attached extension 23 ft x 9 ft approximately Are you the property owner: Owner of the property Property Type: Detached Lo...

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18 Jun

House Extensions

Kilgetty - SA68

Enquiry from: Georgina J

Start Date: Immediate

3 stables, tackroom and hay storage

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08 Mar

House Extensions

Pembroke Dock - SA72

Enquiry from: F W

Start Date: Immediate

15x30ft apex garage with roller shutter door and window Property Type: Semi detached

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FAQs

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.

What types of extension are there?

There are many different types of extension. For example, you could install an orangery, flat or pitched roof extension, over-structure extension, single or double storey extension or a glass box extension. Which one of these is most suitable will depend on your existing property.

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.

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.

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