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House extension features a wide range of benefits which makes it very easy to see why the extension could be a fantastic uptick in the potential rate of your home in terms of sales. So if you're seeking to build a brand-new house extension however still not convinced concerning the job, we're right here to aid you. Being fully aware any house building and construction work is usually a heavy financial investment, there's a big 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 advantages offered by house extensions to aid you decide if it's the most ideal course for you.

 

What's Associated with Adding an Extension?

The steps will vary relying on the range of your extension, but you can expect some, otherwise all, of the below to be entailed when including an expansion to your house:

 

  1. Obtaining Building Regulations or Planning Permission (if required as the extension is larger than permitted development).
  2. Examining your leasehold arrangement (if relevant) to see to it you can do what you want to do.
  3. Enlisting an architect  to draw up the plans, considering your intended use ( kitchen area, restroom, study).
  4. Hiring a competent builder with experience of larger projects.
  5. Contacting your insurance supplier to allow them know of the planned job ahead of it beginning.
  6. Acquiring car parking allows if needed for your specialists to guarantee they have easy accessibility to your residential building.
  7. Seeing to it all planned work falls within permitted allowables.
  8. Cleaning the space and also digging deep into if needed, including the elimination of trees.
  9. Structure job can start.

 

What is the expense of a house extension in city?

If you're thinking about adding a two storey house extension, then establishing a budget for this task would certainly be a fantastic method to start. Similar to a back extension, a two storey extension usually leaves the remainder of the building requiring some job and also, due to its dimension, this might imply the re-development of the whole house - which is why they can be extremely costly. Some of the other influencing aspects that can have large effect on a two floor house extension price consists of: your area, the dimension of the build, intricacy of the layout (anything beyond the basic construct will typically require more experience as well as time), the glazing to be integrated (the much more the glass used in the project, the a lot more the product price), in addition to the team made use of.

Average House extensions cost in Porthmadog

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

House extensions installation cost in Porthmadog 2026

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

House extensions searches in June 2026

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3

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

10

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

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

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Porthmadog

Porthmadog known locally as "Port", is a small Welsh seaside town and former neighborhood, currently in the community of Penrhyndeudraeth in the Eifionydd location of Gwynedd. It has been so led to formally considering that 1974. Prior to 1972 in the administrative area of Caernarfonshire, it lies 5 miles (8 km) east of Criccieth, 11 miles (18 kilometres) south-west of Blaenau Ffestiniog, 25 miles (40 kilometres) north of Dolgellau as well as 20 miles (32 km) south of Caernarfon. It had a population of 4,185 (2011 census). It developed in the 19th century as a port exporting slate to England as well as elsewhere, but since the decline of the market it has ended up being a shopping center and also traveler destination. It has very easy accessibility to Snowdonia National Park as well as is the terminus of the Ffestiniog Railway. The 1987 National Eisteddfod was held in Porthmadog. It includes the nearby towns of Borth-y-Gest, Morfa Bychan and Tremadog.

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Similar Customer Enquiries for House extensions in Porthmadog

26 Jul

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Porthmadog - LL49

Enquiry from: Richard B

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Small extension for utility room

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22 May

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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

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Barmouth - LL42

Enquiry from: Oliver O

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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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25 Jan

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Pwllheli - LL53

Enquiry from: Iain H

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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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02 Apr

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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

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Pwllheli - LL53

Enquiry from: Mr J

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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

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Pwllheli - LL53

Enquiry from: Mr J

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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

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Barmouth - LL42

Enquiry from: Mark W

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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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12 Jun

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

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04 Jan

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Penrhyndeudraeth - LL48

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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

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Pwllheli - LL53

Enquiry from: Gwenllian R

Start Date: Immediate

Home Owner Supplied and Fitted Call to Appoint

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13 Sep

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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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20 May

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Pwllheli - LL53

Enquiry from: Marian H

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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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23 Oct

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Caernarfon - LL55

Enquiry from: Joanna C

Start Date: 1 to 3 months

2 storey side extension; kitchen/diner/utility to ground floor, and bedroom with en-suite to 1st floor. Are you the property owner: Owner of the property Property Type: Semi detached Looking For: Do...

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20 Apr

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Garndolbenmaen - LL51

Enquiry from: Sioned J

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Small extension to rear of house (to extend present kitchen) Roughly between 4 to 6ft by 8ft. Looking For: Single storey extension Do you have planning permission: No Property Type: Terrace

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30 Mar

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Caernarfon - LL55

Enquiry from: Sharon H

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A two storey front extension on a very old barn Are you the property owner: Owner of the property Property Type: Detached Looking For: Double storey extension Do you have planning permission: Ye...

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03 Feb

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Pwllheli - LL53

Enquiry from: Elin M

Start Date: Immediate

Home owner Kitchen extension with bedroom above 20`x20`.Slate roof and one wall mainly glazed joining on to existing house. Call to appoint

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FAQs

how to finance a house extension?

Do you want to beautify and increase the value of your home? If yes, a refurb and house extension is definitely a great option to consider. Depending on your home extension project, the value that’ll be added to your home’s resale value varies. However, the cost of completing a house extension project can be huge, so you just might want to consider your financing options. Fortunately, there are various options through which your house extension project can be funded with each having its own pros and cons. Your specific circumstances will determine the one that’s going to work best for you, so let’s take a look at some of the best options to help you fund your project.

• Home Remortgaging

The process whereby a mortgage is transferred from one provider to the other is known as remortgaging. This is usually done to generate funds for a project by entering a more lengthy repayment term commitment when switching. If you want to raise your funds in a quick manner, this process works best.

• Savings

This is a good reason to cultivate a good saving habits. If you’ve been able to save up some mega bucks then you’d probably won’t have to borrow money to finance your house extension.

• Unsecured Loans

If you do not buy into the idea of borrowing more against your property, you may just be able to apply for an unsecured loan especially if you have a good credit record. A secured loan makes use of collaterals like a car or house to serve as a cover for the lender, meanwhile an unsecured loan is based mainly on the credit managing history of the borrower.

• Credit Card

There are some great benefits that comes with financing your small or medium scale extension project with your credit card. Not only does it offer some real lifeline if problems arise during the project, but you can also avoid paying excessive interest on the investment by ensuring your deal has a 0% introductory rate.

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.

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 much is a double house extension?

A double house extension is basically a construction to any aspect of your house that elevates up to offer two floors of space. It can be structured to suit your existing home in two storeys or as a side wing on a taller property. If you’re considering building a double house extension, then estimating the cost is a very important task to do before commencing the project. In this article, we’ll give you an idea of the cost of a double house extension so you can estimate yours accordingly.

The double house extension cost depends on several factors that’s specific to your home as well as your design choice. These includes:

• Location of your property. Places like London and the southeast will generally cost more than the other regions due to higher demands.

• Accessibility of the site. The ease of your site’s accessibility also plays a key role in the price.

• Size of the extension. The more the extension’s size in footprint and square metres, the higher the possible costs.

• Materials used in making the roof as well as the complexity of the roof design.

• Your choice of finishing. These includes flooring window and door frames, glazing, underfloor heating and roof lights.

• Your property’s soil type. Different types of soil requires varying treatments as well as materials to develop solid foundations.

Constructing a double house extension is a quite simple build in terms of technicality when its to the side or rear of your house as this can also help you save some money. Generally, considerably expanding your home’s space by building a double house extension will cost within the range of £1,500 per m2 to about £2,800 per m2.

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