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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 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 Porthmadog, as reported by local LeadsDoWork members.

House extensions installation cost in Porthmadog 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 Porthmadog in December 2024

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

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

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

House extensions searches in cities and towns near Porthmadog December 2024

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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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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

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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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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

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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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Barmouth - LL42

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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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04 Jan

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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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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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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

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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 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.

Do I need my neighbours’ permission for an extension?

Well the reality is, sometimes, neighbours just don’t get along. With several individuals living in close proximity, it’s little surprise they tend to get on one another’s nerves from time to time. However, there’s a difference between having a tiff and being able to transform your house the way you want without having to obtain your neighbour’s approval.

The short and simple answer to this question is, not necessarily. However, you must first educate yourself by thinking about your extension and how it affects the houses around you. We’d strongly recommend you talk proposals through with your neighbour so as to avoid possible conflicts later. There are a number of reasons why your neighbour can protest to your new home extension plans. Let’s take a look!

 

  • In the event whereby your new extension is blocking their view or providing an unwanted shade on their property. Here, they have a legitimate reason to protest as no one would want their once sunny garden suddenly covered or plummet into shade.
  • In the event where it leads to a loss of privacy. For instance, if your new extension possesses a window which overlooks the neighbour’s property in any way. This is likely to be taken as an invasion of privacy and that has a little to no chance of being a welcomed idea.
  • If it’s a major project and going to take a lot of weeks before completion. The noise generated, especially when your neighbours are enjoying your summer holidays or weekends, can make their gardens not as relaxing as it used to be.
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.

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.

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