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House extension comes with a variety of advantages which makes it easy to see why the extension could be a fantastic uptick in the possible price of your building in regards to sales. So if you're aiming to build a brand-new residence extension yet still not convinced about the project, we're here to help you. Being completely conscious any home building work is usually a heavy investment, there's a substantial requirement to be set on your choice before arranging the start of any type of work. So are house extensions worth it? Below are several of the leading advantages provided by house extensions to assist you make a decision if it's one of the most appropriate course for you.

 

What's Associated with Including an Extension?

The actions will differ relying on the scope of your extension, yet you can expect some, if not all, of the below to be involved when including an expansion to your residence:

 

  1. Getting Building Regulations or Planning Permission (if called for as the extension is larger than permitted development).
  2. Inspecting your leasehold arrangement (if appropriate) to make sure you can do what you intend to do.
  3. Getting an architect  to prepare the plans, considering your intended use ( cooking area, washroom, research study).
  4. Hiring a competent builder with experience of larger projects.
  5. Calling your insurance coverage supplier to let them know of the planned job ahead of it beginning.
  6. Getting auto parking permits if required for your service providers to guarantee they have very easy access to your residential property.
  7. Making sure all planned work falls within allowed allowables.
  8. Clearing up the space and excavating if essential, including the elimination of trees.
  9. Structure work can start.

 

What is the cost of a house extension in city?

If you're thinking about adding a two floor house extension, after that setting a allocate this task would be a terrific means to begin. Similar to a rear extension, a 2 storey extension usually leaves the remainder of the structure needing some job and also, due to its dimension, this may indicate the re-development of the whole house - which is why they can be very expensive. A few of the other influencing aspects that can have large impact on a 2 storey house extension expense includes: your location, the size of the construct, complexity of the design (anything beyond the conventional build will normally need even more competence and time), the glazing to be integrated (the a lot more the glass used in the task, the more the material expense), as well as the team used.

Average House extensions cost in Channel Isles

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

House extensions installation cost in Channel Isles 2025

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

House extensions searches in June 2025

House extensions Projects in Channel Isles in May 2025

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Requests for quotations in Channel Isles in May 2025

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Requests for House extensions quotations in Channel Isles in May 2025. 0% change from April 2025.

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

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

House extensions searches in cities and towns near Channel Isles May 2025

House extensions near you

Channel Isles

The Channel Islands are situated in the English Channel with a population of approximately 160,000. Having a small land area, the Channel Islands possess a large population density of 2,187 individuals per square mile. Whilst the islands are situated near to the Normandy Coast, they are still part of the British Crown Dependencies including Guernsey, Jersey and six additional inhabited islands. For all household upgrades you're looking for for your property on the Channel Islands, assess quotes from reliable businesses to get the ideal price.

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Similar Customer Enquiries for House extensions in Channel Isles

22 Jun

House Extensions

St Lawrence, St Ouen, St Mary, St John, Trinity, Grouville - JE3

Enquiry from: Megan R

Start Date: Immediate

Single story house extension approx 1.2m x 2.8m.

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21 Apr

House Extensions

St Lawrence, St Ouen, St Mary, St John, Trinity, Grouville - JE3

Enquiry from: Luke W

Start Date: Immediate

A single story extension to the rear of the property approx 25m2, fit kitchen, outfit a utility room with electrical points and plumbing for washing machine etc. Plumbing for a toilet in utility room....

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21 Jan

House Extensions

St Lawrence, St Ouen, St Mary, St John, Trinity, Grouville - JE3

Enquiry from: Steve B

Start Date: Immediate

12x8. Lean to, with slates. Granite work to front and side. Wooden door and window. To be a kitchen.

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29 Dec

House Extensions

St Helier, St Clement, St Saviour - JE2

Enquiry from: Jonny B

Start Date: Immediate

Two storey extension. Kitchen/diner, downstairs shower room, upstairs bedroom (possibly en-suite)

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18 Oct

House Extensions

St Helier, St Clement, St Saviour - JE2

Enquiry from: Lauren B

Start Date: Immediate

Extension from kitchen/ diner where a shed is now.

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12 Aug

House Extensions

St Helier, St Clement, St Saviour - JE2

Enquiry from: Jennifer C

Start Date: Immediate

Extend kitchen out back , potential balcony from first floor bedroom and make most of the ground floor open plan.

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03 Mar

House Extensions

St Helier, St Clement, St Saviour - JE2

Enquiry from: Tracey B

Start Date: 1 to 3 months

increase the size of existing extension and add a proper roof Are you the property owner: Owner of the property Looking For: Single storey extension Do you have planning permission: Yes Do you have pl...

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24 Feb

House Extensions

St Lawrence, St Ouen, St Mary, St John, Trinity, Grouville - JE3

Enquiry from: Sandra D

Start Date: Immediate

Extension at the back of the house to include downstairs & upstairs.

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07 Jan

House Extensions

St Helier, St Clement, St Saviour - JE2

Enquiry from: Tim S

Start Date: Less than one month

To extend above the garage and utility room which has a flat roof. To extend above to create a master bedroom and en suite to be inline with the main house. . Are you the property owner: Owner of the ...

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28 Dec

House Extensions

St Lawrence, St Ouen, St Mary, St John, Trinity, Grouville - JE3

Enquiry from: Mike O

Start Date: Immediate

One story extension flat roof with roof windows 10M x 5M. longest side all bi-fold doors. to be breakfast room and kitchen

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17 Nov

House Extensions

St Helier, St Clement, St Saviour - JE2

Enquiry from: Denis L

Start Date: Immediate

A single story extension (10m x 5m) Are you the property owner: Owner of the property Property Type: Detached Looking For: Single storey extension Do you have planning permission: No Do you have plan...

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20 Jun

House Extensions

St Lawrence, St Ouen, St Mary, St John, Trinity, Grouville - JE3

Enquiry from: Christine A

Start Date: Immediate

Extension to west wing to include, first floor entrance, staircase, lounge, extension to existing bedroom and bathroom 2nd floor bedroom , walk in wardroabe and bathroom . - demolish bedroom and ...

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18 Feb

House Extensions

St Helier, St Clement, St Saviour - JE2

Enquiry from: Vishal S

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: 45 Agreed to recieve quotes for selected products: Yes Please call to ...

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06 Nov

House Extensions

St Helier, St Clement, St Saviour - JE2

Enquiry from: Sam T

Start Date: Immediate

We currently have a conservatory which we would like to make solid build and have an extended part of our lounge.

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10 Jul

House Extensions

Vale, Saint Andrew - GY6

Enquiry from: R H

Start Date: Immediate

Install a large window in the end gable of a double garage, build an internal staircase at the towards the back of the garage for access to the first floor loft. Convert the centre of the loft into an...

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24 Apr

House Extensions

Saint Martin - GY4

Enquiry from: C J

Start Date: Immediate

Single storey kitchen and utility, flat roof, replace drainage. Easy access, plans passed and ready to start.

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18 Feb

House Extensions

St Helier, St Clement, St Saviour - JE2

Enquiry from: Keith H

Start Date: Immediate

Extension to the rear of the property approx. 3mtrs x 6mtrs. Pitched roof with 2 x velux windows. The rear to be mainly full length windows and either Bi-fold or French doors. Also 1 x door to the si...

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FAQs

What types of extension are there?

There are many different types of extension. For example, you could install an orangery, flat or pitched roof extension, over-structure extension, single or double storey extension or a glass box extension. Which one of these is most suitable will depend on your existing property.

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.

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.

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.
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