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House Extension in city

House extension features a large range of advantages which makes it simple to see why the extension could be a fantastic uptick in the potential cost of your building in terms of sales. So if you're looking to construct a new house extension but still not convinced regarding the task, we're here to aid you. Being completely mindful any kind of home building work is normally a hefty investment, there's a big need to be set on your decision prior to setting up the start 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 determine if it's one of the most ideal course for you.

 

What's Involved in Building an Extension?

The steps will vary depending upon the range of your extension, however you can anticipate some, if not all, of the listed below to be included when including an extension to your house:

 

  1. Getting Building Regulations or Planning Permission (if required as the extension is larger than permitted development).
  2. Examining your leasehold agreement (if relevant) to make certain you can do what you intend to do.
  3. Employing an architect  to draw the plans, considering your intended usage ( cooking area, restroom, office).
  4. Hiring a competent builder with experience of larger projects.
  5. Contacting your insurance coverage carrier to allow them know of the planned work ahead of it beginning.
  6. Acquiring car parking permits if required for your specialists to ensure they have simple accessibility to your building.
  7. Making certain all prepared work falls within allowed allowables.
  8. Cleaning the space as well as digging deep into if necessary, including the elimination of trees.
  9. Building job can begin.

 

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 project would certainly be a terrific method to begin. Similar to a back extension, a 2 floor extension generally leaves the rest of the structure requiring some job and, as a result of its dimension, this may suggest the re-development of the whole house - which is why they can be extremely costly. Some of the various other affecting aspects that can have huge effect on a two floor house extension expense consists of: your area, the dimension of the construct, intricacy of the style (anything past the conventional construct will normally require even more competence as well as time), the glazing to be included (the extra the glass made use of in the job, the a lot more the material price), in addition to the group made use of.

Average House extensions cost in Castlewellan

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

House extensions installation cost in Castlewellan 2025

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

House extensions searches in January 2025

House extensions Projects in Castlewellan in December 2024

76

Requests for quotations in Castlewellan in December 2024

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Requests for House extensions quotations in Castlewellan in December 2024. 0% change from November 2024.

30

Requests for House extensions quotations in County Down in December 2024. -25% change from November 2024.

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

House extensions searches in cities and towns near Castlewellan December 2024

30

Requests for quotations in Belfast in December 2024

13

Requests for quotations in Lisburn in December 2024

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Requests for quotations in Strabane in December 2024

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Requests for quotations in Newtownabbey in December 2024

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Requests for quotations in Carrickfergus in December 2024

Northern Ireland is the Irish area of the United Kingdom, with the Republic of Ireland providing the remainder of the island. It comes with a population of just over 1.8 million, plus a population density of 133 people per square kilometre. This population is just 3% of the United Kingdom and 28% of people on the island of Ireland. Northern Ireland’s capital city of Belfast holds the most significant population of around 340,000, while Derry and Lisburn have 100,000 and 45,000 respectively. For all your home improvement projects in Northern Ireland, use reputable specialists to make sure you get a high-quality finish.

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Similar Customer Enquiries for House extensions in Castlewellan

24 Jan

House Extensions

Castlewellan - BT31

Enquiry from: Aislinn M

Start Date: Immediate

Side extension to kitchen

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18 Nov

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knock down existing sun room - extend kitchen out across patio - create utility room - entrance/mud room with shower - convert garage to room- add ensuite shower and toilet to garage room - add ensuit...

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16 May

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Ballynahinch - BT24

Enquiry from: Roger W

Start Date: 1 to 3 months

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

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13 Sep

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Banbridge - BT32

Enquiry from: Brad S

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My garage is 3 " too short for my new car to fit in and get the door closed. The garage is of rendered breeze block construction with plenty of space behind it. I am wondering if it is possible to b...

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20 Jul

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Large Prk - BT26

Enquiry from: Mark B

Start Date: 1 to 3 months

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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14 Jun

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Downpatrick - BT30

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Block built rendered garage average one car..tiled pitch roof

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02 May

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Newry (South Down section) - BT34

Enquiry from: Sean-Art C

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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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14 Apr

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Newry (South Down section) - BT34

Enquiry from: Paul M

Start Date: Immediate

we require a 8m x 4.3m modular extension onto the side of our house. it will be an extension of our kitchen/diner room. are you the property owner: owner of the property property type: semi detached l...

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15 Feb

House Extensions

Newry (South Down section) - BT34

Enquiry from: Katherine K

Start Date: 1 to 3 months

back of house built up with blocks and new windows, new kitchen and bathroom and building on a wash room and separate bedroom are you the property owner: owner of the property looking for: single stor...

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23 Jan

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Banbridge - BT32

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basic single garage attached to house with external access only are you the property owner: owner of the property property type: detached looking for: single storey extension do you have planning perm...

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10 Nov

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Newry (South Down section) - BT34

Enquiry from: David M

Start Date: Immediate

detached double garage which will need existing drive to be extended as well. are you the property owner: owner of the property do you have planning permission: yes do you have plans drawn up: no do y...

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19 Jul

House Extensions

Downpatrick - BT30

Enquiry from: Angela G

Start Date: 1 to 3 months

either 8x5m or 6x4m flat roof extension along rear of house to extend existing kitchen and utility atea. are you the property owner: owner of the property looking for: single storey extension do you h...

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08 May

House Extensions

Downpatrick - BT30

Enquiry from: Ann N

Start Date: 1 to 3 months

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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Large Prk - BT26

Enquiry from: Richard D

Start Date: Immediate

A double garage with pitched roof min 6m x 6m internal

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16 Dec

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Banbridge - BT32

Enquiry from: Lee W

Start Date: Less than one month

2 story extension approx 300 square feet in total150 ground floor 150 first floor open plan dining and new family room. Are you the property owner: Owner of the property Looking For: Double storey ex...

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17 Sep

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Ballynahinch - BT24

Enquiry from: Graham A

Start Date: Less than one month

20X12ft domestic garage with side door and 8ft wide roller door. Customer is currently in the process of looking for quotes to add a Single storey extension to their property. Are you the property ow...

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14 Jun

House Extensions

Large Prk - BT26

Enquiry from: Sasha F

Start Date: Immediate

We would like a garage extension on the side of the house that would have a utility room and downstairs bathroom within it.

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31 Jul

House Extensions

Newry (South Down section) - BT34

Enquiry from: David C

Start Date: Less than one month

kitchen extension, plans already approved by building control and available to view. Customer is currently in the process of looking for quotes to add a Single storey extension to their property. Are...

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07 Jun

House Extensions

Waringsford - BT25

Enquiry from: Raymond R

Start Date: Less than one month

Single story ground extension. Sitting area off the kitchen, with utility and large storage beyond. Are you the property owner: Owner of the property Property Type: Semi detached Looking For: Single s...

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21 May

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Large Prk - BT26

Enquiry from: Stephen S

Start Date: Immediate

3m x 5m red Brick garage. Foundations - concrete plinth?, 1 roller door, 1 access door, 1 window, guttering Are you the property owner: Owner of the property Looking For: Single storey extension Do yo...

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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.

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.

Should I use concrete or timber footings?

For 2 metre solid fences it’s recommended to use concrete posts to support each panel. For smaller 1 metre fences or for picket fences with gaps between each timber piece you can use timber posts. A fencing contractor will be able to advise you on the best materials from the length and requirements of a new fence.

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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