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House Extension in city

House extension features a wide variety of benefits which makes it very easy to see why the extension could be a fantastic uptick in the prospective price of your residential or commercial property in regards to sales. So if you're aiming to construct a new house extension yet still not convinced regarding the job, we're right here to aid you. Being fully aware any kind of house building job is usually a heavy financial investment, there's a massive requirement to be set on your choice before setting up the start of any job. So are house extensions worth it? Below are some of the leading benefits offered by house extensions to help you decide if it's the most ideal path for you.

 

What's Associated with Including an Extension?

The steps will certainly vary relying on the range of your extension, but you can expect some, if not all, of the below to be included when adding an expansion to your house:

 

  1. Acquiring Building Regulations or Planning Permission (if required as the extension is larger than permitted development).
  2. Examining your leasehold agreement (if applicable) to make sure you can do what you wish to do.
  3. Getting an architect  to create the plans, considering your expected use ( cooking area, restroom, study).
  4. Hiring a competent builder with experience of larger projects.
  5. Contacting your insurance coverage provider to allow them recognize of the planned work ahead of it starting.
  6. Acquiring car parking allows if needed for your specialists to guarantee they have simple access to your residential building.
  7. Seeing to it all intended job drops within permitted allowables.
  8. Clearing the area and also digging deep into if essential, consisting of the removal of trees.
  9. Structure job can begin.

 

What is the cost of a house extension in city?

If you're taking into consideration including a 2 storey house extension, after that setting a allocate this task would certainly be a terrific way to get started. Comparable to a rear extension, a two floor extension normally leaves the remainder of the structure needing some work and, as a result of its dimension, this may imply the re-development of the whole house - which is why they can be extremely pricey. Some of the other influencing aspects that can have huge impact on a 2 floor house extension expense includes: your location, the size of the develop, complexity of the design (anything beyond the common construct will usually require more competence as well as time), the glazing to be incorporated (the more the glass utilized in the task, the a lot more the product expense), as well as the group utilized.

Average House extensions cost in County Londonderry

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

House extensions installation cost in County Londonderry 2026

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

House extensions searches in June 2026

House extensions Projects in County Londonderry in May 2026

2,391

Requests for quotations in County Londonderry in May 2026

20

Requests for House extensions quotations in County Londonderry in May 2026. 0% change from April 2026.

194

Requests for House extensions quotations in Northern Ireland in May 2026. -22% change from April 2026.

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

House extensions searches in cities and towns near County Londonderry May 2026

10

Requests for quotations in Coleraine in May 2026

10

Requests for quotations in Londonderry in May 2026

1

Requests for quotations in Maghera in May 2026

1

Requests for quotations in Magherafelt in May 2026

1

Requests for quotations in Limavady in May 2026

House extensions near you

County Londonderry

The county of Londonderry, known as Derry, is among one of Northern Ireland's 6 counties and it has a population of 233,500. It takes its name from the city of the same name, which is the second biggest in Northern Ireland. With a contrast of classic and modern houses there are a variety of household renovations necessary to keep home value and ensure aesthetic attractiveness. Be sure to make use of professional tradesmen in Londonderry for all your house improvement work and guarantee high quality.

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Similar Customer Enquiries for House extensions in County Londonderry

25 Jul

House Extensions

Londonderry - BT47

Enquiry from: Lucinda S

Start Date: Immediate

wanting to extend kitchen to allow a small sun room are you the property owner: owner of the property property type: terrace looking for: single storey extension do you have planning permission: no do...

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11 Jun

House Extensions

Magherafelt - BT45

Enquiry from: Jean B

Start Date: Less than one month

hi brian, i would need a down stairs bathroom added, would you be able to come and have a look and give us a quote please you can text *** are you the property owner: owner of the property property ty...

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31 Aug

House Extensions

Portstewart - BT55

Enquiry from: Olivia M

Start Date: Immediate

mrs requested quotes for house extension from a builder around portstewart. they are considering a couple of projects at the moment.call anytime to arrange appointment to discuss. the information belo...

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23 Mar

House Extensions

Coleraine - BT51

Enquiry from: Sarah J

Start Date: Immediate

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

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04 Oct

House Extensions

Londonderry - BT48

Enquiry from: Carina D

Start Date: Less than one month

there is a dining room with entry currently from the sitting room. i want to have this closed off and knock through the wall from the kitchen into the dining room and move the kitchen down here. addit...

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04 Oct

House Extensions

Coleraine - BT51

Enquiry from: Barbara B

Start Date: Immediate

plans were passed years ago for detatched garage. i was over optimistic on garage plan, two storey etc. would settle for regular garage with storage space maybe double but open to duscussion. i still ...

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21 Aug

House Extensions

Londonderry - BT47

Enquiry from: Kevin B

Start Date: Immediate

attached garage ... have drawing already done are you the property owner: owner of the property property type: detached looking for: single storey extension do you have planning permission: yes do you...

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10 Aug

House Extensions

Portstewart - BT55

Enquiry from: Connor M

Start Date: Immediate

I need a home gym quoted and built ideally around 75sq meters I think was hoping for some advise also

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08 Aug

House Extensions

Maghera - BT46

Enquiry from: Patricia P

Start Date: Immediate

10 x 8 foot utility space. With pitched roof and one window. Will use existing door and frame.

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29 Jul

House Extensions

Londonderry - BT48

Enquiry from: Peter C

Start Date: Less than one month

i would like ball park quotes for a single story ground floor extension. this is to incorporate a bedroom and en-suite bathroom. the area is approx 21.5 square meters. customer is currently in the ...

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16 Jul

House Extensions

Londonderry - BT48

Enquiry from: DENISE C

Start Date: 1 to 3 months

looking for a single story extension. planning permission has been submitted. copy of plans for quote are you the property owner: owner of the property looking for: single storey extension do you hav...

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30 Jun

House Extensions

Londonderry - BT48

Enquiry from: DENISE C

Start Date: Immediate

Sunroom added to side of kitchen 3mx4M

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07 Jun

House Extensions

Londonderry - BT47

Enquiry from: Mervyn M

Start Date: Immediate

Looking for a detached garage not massive but idle for the house

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08 May

House Extensions

Londonderry - BT47

Enquiry from: JOANNE P

Start Date: Less than one month

hi, looking to add sunroom/extension onto the back of our semi-detached house. looking to add it on to the french doors which are situated beside adjoining neighbour side. looking for one room to sit ...

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01 Mar

House Extensions

Londonderry - BT47

Enquiry from: Emma C

Start Date: Less than one month

A detached garage for my home. 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: No Do you require ...

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22 Feb

House Extensions

Coleraine - BT52

Enquiry from: Richard D

Start Date: Less than one month

Extension approximately 15ft x 7ft. One storey. Flat roof. Work room at far end. Small bathroom (toilet and sink). One door. 2 windows. Small corridor from back door past bathroom to work room. Are yo...

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17 Feb

House Extensions

Limavady - BT49

Enquiry from: JP M

Start Date: Immediate

Extension to back of house

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18 Sep

House Extensions

Londonderry - BT48

Enquiry from: Fergal E

Start Date: Immediate

approx. 11m2 disabled bedroom and approx. 5m2 associated en-suite extension with lobby and door to outside - flat roof and temporary in nature. Can be disconnected and removed and reused elsewhere

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22 Aug

House Extensions

Coleraine - BT51

Enquiry from: CIARA D

Start Date: Immediate

Detatched garage 20ft by 12ft

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01 Aug

House Extensions

Coleraine - BT51

Enquiry from: JACQUELINE F

Start Date: 1 to 3 months

Price for basic garage And garage with room above Customer is currently in the process of looking for quotes to add a Double storey extension to their property. Are you the property owner: Owner of t...

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FAQs

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.

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.

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.

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.

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