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House extension includes a vast array of advantages that makes it easy to see why the extension could be a fantastic uptick in the potential cost of your residential or commercial property in regards to sales. So if you're seeking to build a new house extension yet still not convinced concerning the project, we're here to aid you. Being completely aware any type of residence building and construction job is typically a heavy investment, there's a massive need to be set on your decision prior to setting up the start of any kind of work. So are house extensions worth it? Below are several of the top advantages provided by house extensions to aid you determine if it's the most appropriate route for you.

 

What's Involved in Building an Extension?

The actions will certainly vary depending upon the extent of your extension, but you can expect some, if not all, of the listed below to be entailed when adding an expansion to your residence:

 

  1. Acquiring Building Regulations or Planning Permission (if needed as the extension is larger than permitted development).
  2. Checking your leasehold contract (if relevant) to make certain you can do what you want to do.
  3. Hiring an architect  to prepare the plans, considering your planned use (kitchen, shower room, research study).
  4. Hiring a competent builder with experience of larger projects.
  5. Contacting your insurance service provider to let them understand of the planned job ahead of it beginning.
  6. Acquiring auto parking allows if required for your specialists to ensure they have easy accessibility to your property.
  7. Making certain all planned work falls within permitted allowables.
  8. Cleaning the area and also digging deep into if required, including the elimination of trees.
  9. Building work can start.

 

What is the price of a house extension in city?

If you're considering including a 2 storey house extension, after that setting a budget for this task would be a fantastic means to get going. Comparable to a rear extension, a two floor extension usually leaves the rest of the structure needing some work and also, because of its size, this might indicate the re-development of the entire house - which is why they can be really costly. A few of the other affecting aspects that can have huge impact on a 2 floor house extension cost includes: your area, the dimension of the construct, intricacy of the design (anything beyond the conventional construct will generally require more competence as well as time), the glazing to be integrated (the more the glass utilized in the task, the more the material expense), as well as the group used.

Average House extensions cost in Gwynedd

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

House extensions installation cost in Gwynedd 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 Gwynedd in April 2025

2,152

Requests for quotations in Gwynedd in April 2025

10

Requests for House extensions quotations in Gwynedd in April 2025. 0% change from March 2025.

177

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

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

House extensions searches in cities and towns near Gwynedd April 2025

15

Requests for quotations in Llandudno in April 2025

11

Requests for quotations in Conwy in April 2025

10

Requests for quotations in Bangor in April 2025

10

Requests for quotations in Caernarfon in April 2025

10

Requests for quotations in Holyhead in April 2025

Gwynedd

The northwest Welsh region of Gwynedd boasts a populace of 121,900 and it is one of the country's preserved counties. The City of Bangor is situated inside the county, along with a great deal of the Snowdonia National Park. With the second largest land area in Wales, covering 2,548 kilometres squared, Gwynedd has a small populace density of just 47 people/km squared. In 1974 the region was broken down into five regions, with the Isle of Anglesey becoming an individual unitary authority. For all of your house upgrades in Gwynedd, work with reputable professionals to be certain a top quality finish and enjoy peace of mind.

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Similar Customer Enquiries for House extensions in Gwynedd

22 May

House Extensions

Pwllheli - LL53

Enquiry from: Michal S

Start Date: Immediate

customer in pwllheli area has requested that we arrange quotes for their house extension project.miss are considering various options and would like to discuss with a builder directly.please call to d...

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07 Mar

House Extensions

Barmouth - LL42

Enquiry from: Oliver O

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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25 Jan

House Extensions

Pwllheli - LL53

Enquiry from: Iain H

Start Date: Immediate

customer in the pwllheli area made an enquiry a couple of projects including house extension.call anytime and arrange an appointment to discuss. below is some details about this project: are you the p...

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09 Nov

House Extensions

Conwy - LL32

Enquiry from: Chris S

Start Date: Immediate

customer in conwy area has requested that we arrange quotes for their house extension project.they are considering various options and would like to discuss with a builder directly.please call to disc...

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02 Apr

House Extensions

Dyffryn Ardudwy - LL44

Enquiry from: Ron G

Start Date: 1 to 3 months

customer requested quotes for house extension from a builder around dyffryn ardudwy. they are considering a couple of projects at the moment.call anytime to arrange appointment to discuss. the informa...

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16 Mar

House Extensions

Pwllheli - LL53

Enquiry from: Mr J

Start Date: Immediate

are you the property owner: owner of the property property type: detached other forms: house extension agreed to receive quotes for selected products: yes please call to appoint

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01 Mar

House Extensions

Pwllheli - LL53

Enquiry from: Mr J

Start Date: Immediate

are you the property owner: owner of the property property type: detached other forms: house extension agreed to receive quotes for selected products: yes please call to appoint

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23 Feb

House Extensions

Barmouth - LL42

Enquiry from: Mark W

Start Date: Immediate

are you the property owner: owner of the property property type: detached property age: 1900-1930 how many bedrooms: 5+ rooms roof height: 3rd floor+ is your roof pitched or flat: pitched do you requ...

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16 Jan

House Extensions

Menai Bridge - LL59

Enquiry from: Rory S

Start Date: 1 to 3 months

single large apex garage and car port off thr right side of the garage. concrete pad laying for both. electric and water customer is currently in the process of looking for quotes to add a single sto...

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01 Jul

House Extensions

Llandudno - LL30

Enquiry from: Sophie S

Start Date: Immediate

20ft x20ft flat roof extension to the rear of the property

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20 Dec

House Extensions

Holyhead - LL65

Enquiry from: Rhiannon B

Start Date: Less than one month

An extension for my grandmother so she can be downstairs. She wants a clear roof as her sight is so bad. She also wants a toilet, sink and walk in shower Are you the property owner: Owner of the prop...

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12 Jun

House Extensions

Pwllheli - LL53

Enquiry from: Marcia P

Start Date: Immediate

New door bolt and foot bolt photo available .please send email address.

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04 Jan

House Extensions

Penrhyndeudraeth - LL48

Enquiry from: Iwan J

Start Date: Immediate

Single storey flat roof extension - extending onto an existing flat roof extension. Existing outhouse to be demolished. Size of build 3300mm along existing building by 3800mm. To include shower room ...

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03 Nov

House Extensions

Pwllheli - LL53

Enquiry from: Gwenllian R

Start Date: Immediate

Home Owner Supplied and Fitted Call to Appoint

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08 Oct

House Extensions

Rhosneigr - LL64

Enquiry from: Beccy P

Start Date: Immediate

6600mm x 4600mm annex new build

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22 May

House Extensions

Betws-y-Coed - LL24

Enquiry from: BRENDA N

Start Date: Immediate

Garage Customer is currently in the process of looking for quotes to add a Single storey extension to their property. Are you the property owner: Owner of the property Property Type: Detached Looking...

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23 Feb

House Extensions

Tywyn - LL36

Enquiry from: Stuart W

Start Date: Immediate

Are you the property owner: Owner Have you considered getting your windows replaced to match a new conservatory: No Other Forms: 45 Agreed to recieve quotes for selected products: Yes Please call to ...

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13 Sep

House Extensions

Caernarfon - LL54

Enquiry from: Mr P

Start Date: 1 to 3 months

double storey rear extension - to same line as 2 New Street Trefor. Are you the property owner: Owner of the property Property Type: Terrace Do you have planning permission: No Do you have plans drawn...

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27 Aug

House Extensions

Holyhead - LL65

Enquiry from: Miss N

Start Date: Immediate

Chapel conversion - creation of an inner sleeve of load bearing wall, that covers half of the ground floor. To create a mezzanine first floor layer. Walls to be 7foot high and support floor joists, f...

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20 May

House Extensions

Pwllheli - LL53

Enquiry from: Marian H

Start Date: Immediate

Plans for extending an old kitchen. architect needed with clear plans/structural engineer needed and a builder. Are you the property owner: Owner of the property Looking For: Single storey extension D...

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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.

Can I extend the front of my house?

When it comes to extending a home, the rear of the house often comes to mind a lot more than the front. However, this doesn’t mean that you can’t extend the front of your house. This can be done either as part of a renovation project whereby the entire house is incorporated or it can also be done in isolation. It’s possible to extend the front of your house without the need to apply for a planning permission, however, there are a bunch of limitations you’d have to comply with if you wish to carry out with such a project. Sometimes, this may imply that extending to the front of your home is more tedious and tasking than extending your home’s rear. So exactly how far can you extend the front of your home without planning permission?

 

The short and simple answer to this question is 2 metres square area with a height not more than 3 metres. Generally, you do not need a planning permission to build a front porch as long as its area doesn’t go beyond 2 square metres from a public road or walkway. Also, a tiled or slated roof can be as much as 4 metres but other roofs must not go beyond 3 metres in height. If you want to extend the front of your home beyond the restrictions specified, then you’ll have to apply for a planning permission.

 

Extending the front of home can be quite costly, but this can be controlled by not building to the extension to the highest specification, not including an extension on kitchens or bathrooms and more.

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.

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.

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