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House Extension in city

House extension includes a large range of advantages that makes it very easy to see why the extension could be a fantastic uptick in the possible price of your property in terms of sales. So if you're seeking to develop a new residence extension but still not encouraged concerning the task, we're below to help you. Being fully aware any kind of home building and construction job is typically a hefty financial investment, there's a massive demand to be set on your decision before setting up the beginning of any work. So are house extensions worth it? Below are several of the top advantages used by house extensions to aid you decide if it's one of the most appropriate path for you.

 

What's Involved in Adding an Extension?

The actions will certainly differ depending on the range of your extension, yet you can expect some, if not all, of the listed below to be entailed when including an expansion to your home:

 

  1. Acquiring Building Regulations or Planning Permission (if needed as the extension is larger than permitted development).
  2. Inspecting your leasehold contract (if applicable) to make certain you can do what you want to do.
  3. Employing an architect  to create the plans, considering your expected usage (kitchen, washroom, research study).
  4. Hiring a competent builder with experience of larger projects.
  5. Contacting your insurance policy company to let them recognize of the planned work ahead of it starting.
  6. Acquiring parking permits if required for your service providers to guarantee they have very easy access to your home.
  7. Making sure all prepared job falls within permitted allowables.
  8. Clearing up the space and excavating if necessary, consisting of the elimination of trees.
  9. Structure work can begin.

 

What is the price of a house extension in city?

If you're taking into consideration adding a two storey house extension, after that setting a allocate this job would certainly be a great method to get going. Comparable to a rear extension, a two storey extension generally leaves the rest of the building needing some work and, because of its dimension, this might imply the re-development of the whole house - which is why they can be really costly. Some of the various other influencing aspects that can have big impact on a 2 floor house extension expense consists of: your area, the size of the develop, intricacy of the layout (anything beyond the typical construct will generally call for more expertise and also time), the glazing to be integrated (the more the glass used in the project, the more the material price), along with the group used.

Average House extensions cost in St Helens

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

House extensions installation cost in St Helens 2025

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

House extensions searches in April 2025

House extensions Projects in St Helens in March 2025

4,104

Requests for quotations in St Helens in March 2025

18

Requests for House extensions quotations in St Helens in March 2025. 38% change from February 2025.

150

Requests for House extensions quotations in Merseyside in March 2025. 36% change from February 2025.

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

House extensions searches in cities and towns near St Helens March 2025

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St Helens

The Merseyside town of St Helens has a population more than 100,000, found in Lancashire to the northwest of England. The town developed rapidly during the Industrial Revolution and even today stays a commercial region. For your next house improvement, make sure to use accredited firms in St Helens.

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House extensions pros in St Helens

Magnus Technical Engineering LTD

6 review(s)
Based: in Appley bridge, WN6 9DB

Latest review

Vic F., SK23
5

House Extensions in High Peak

Excellent and professional approach.

Similar Customer Enquiries for House extensions in St Helens

12 Jan

House Extensions

St. Helens - WA9

Enquiry from: Tom W

Start Date: Immediate

Hi, I’m looking to get a double storey extension done at the side of my house, and wondering if we could get a quote please? Thankyou.

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17 Oct

House Extensions

St. Helens - WA9

Enquiry from: Francis T

Start Date: Immediate

want to know the cost of extension kitchen

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23 Feb

House Extensions

St. Helens - WA10

Enquiry from: David M

Start Date: Immediate

mr requested quotes for house extension from a builder around st. helens. they are considering a couple of projects at the moment.call anytime to arrange appointment to discuss. the information below ...

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04 Jan

House Extensions

St. Helens - WA11

Enquiry from: Erwin T

Start Date: Immediate

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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31 Jul

House Extensions

St. Helens - WA9

Enquiry from: Susana T

Start Date: Immediate

customer in the st. helens 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...

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07 Feb

House Extensions

St. Helens - WA10

Enquiry from: Mark D

Start Date: Immediate

are you the property owner: owner have you considered getting your windows replaced to match a new conservatory: no other forms: house extension agreed to receive quotes for selected products: yes pl...

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04 Jul

House Extensions

St. Helens - WA11

Enquiry from: Sharon L

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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26 May

House Extensions

St. Helens - WA10

Enquiry from: Alison K

Start Date: Immediate

are you the property owner: owner have you considered getting your windows replaced to match your conservatory: yes how many windows are you looking for: 5+ windows other forms: kitchen design & inst...

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06 May

House Extensions

St. Helens - WA9

Enquiry from: Vincent E

Start Date: Immediate

erect any side return extension to provide a kitchen extension and a new shower room. additionally remove 1 internal wall dividing the hall and the sitting room . the house will be vacant during all ...

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15 Jan

House Extensions

St. Helens - WA9

Enquiry from: Amy S

Start Date: Immediate

Double story extention Are you the property owner: Owner of the property Property Type: Semi detached Looking For: Double storey extension Do you have planning permission: No Do you have plans drawn u...

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18 Jul

House Extensions

St. Helens - WA10

Enquiry from: David G

Start Date: 3+ months

Customer visited the myhouseextension.co.uk site and submitted an enquiry. Property type: Semi detached, Work description: A rear ground floor extension. Knock through two supporting walls and c...

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26 Jun

House Extensions

St. Helens - WA9

Enquiry from: Bianca S

Start Date: Immediate

Customer visited the myhouseextension.co.uk site and submitted an enquiry. Property type: Terrace, Work description: Home improvement kitchen extension 3m height with 3m into garden, will bring exte...

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28 Mar

House Extensions

St. Helens - WA10

Enquiry from: Richard C

Start Date: Less than one month

A 3m x 9m single storey side extension with sloping roof. The extension to create three areas: an enlarged kitchen / breakfast room with rear door exit, a utility room, and a shower and toilet. Custo...

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17 Mar

House Extensions

St. Helens - WA9

Enquiry from: Johanna M

Start Date: 1 to 3 months

Are you the property owner: Owner of the property Property Type: Semi detached How many bedrooms does the property have: 3-4 Bedrooms Other Forms: 45, 77 Agreed to recieve quotes for selected product...

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02 Feb

House Extensions

St. Helens - WA11

Enquiry from: Alan S

Start Date: Immediate

Kitchen extension & possible sun room, contact me via email as I do not answer the phone to unknown numbers for obvious reasons. Are you the property owner: Owner of the property Looking For: Single...

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03 Jan

House Extensions

St. Helens - WA10

Enquiry from: Richard F

Start Date: Immediate

We have a garage at the side of the house. We'd like some ideas about how to use the space for a shower room, utility room, bedroom etc. We don't mind extending out to the back either.

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02 Nov

House Extensions

St. Helens - WA10

Enquiry from: L

Start Date: Immediate

2 storey extension to side of semi. Drains will need to be re-directed or moved

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13 Oct

House Extensions

St. Helens - WA9

Enquiry from: Stefan J

Start Date: 1 to 3 months

We live in a three bedroom semi detached house, but the third bedroom was converted into a bathroom which was previously downstairs. We have one child, a six-year-old boy, and another on the way so so...

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07 Jun

House Extensions

St. Helens - WA10

Enquiry from: Salah A

Start Date: Immediate

Build one bedroom extension above the existing one. The plan has drawn & the planning permission approved.

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06 Jun

House Extensions

St. Helens - WA11

Enquiry from: Dave O

Start Date: Immediate

Building quotes for a large double storey rear and side extension

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FAQs

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.

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.

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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