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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 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 St Helens, as reported by local LeadsDoWork members.

House extensions installation cost in St Helens 2026

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

House extensions searches in June 2026

House extensions Projects in St Helens in May 2026

4,104

Requests for quotations in St Helens in May 2026

18

Requests for House extensions quotations in St Helens in May 2026. 38% change from April 2026.

150

Requests for House extensions quotations in Merseyside in May 2026. 36% change from April 2026.

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

House extensions searches in cities and towns near St Helens May 2026

38

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18

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10

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10

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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

Can an extension add value to my home?

Yes. Most extensions will add substantial value to your home, and you may find that the extension adds more value than it cost. However, it’s important to be sure that the home remains balanced. Extending your garage and leaving your property with no parking spaces, for example, may impact your ability to sell.

how much value does an extension add to your house?

Are you interested in extending your home to create more living space? If yes, then you’d probably want to know how much value it can add to your property in order to compare the building costs to the potential value gain. Well, as long as you know what you’re doing, your house doesn’t necessarily have to be a money pit. So what are your options when talking about home extensions and what’s the associated value to be gained?

• Bathroom Extensions

Although you should have it in mind that bathroom extensions isn’t usually that cheap, but once done, it can increase the value of a standard UK house within the range of £12,000 to £15,000. Meanwhile the finishing cost of a bathroom can range from £2,500 to £7,000.

• Single or Double Storey Extensions

Single storey extensions are always huge when it comes to increasing the value of your home - giving about 4 to 7 percent increase. If it goes that far, then literally nothing beats a full spectrum, double storey extension which can give up to 11 percent increase in the value of a property - equalling about a whooping £33,000 for a standard home in the UK.

• Conservatory Extension

With conservatories becoming more and more popular in the UK due to the weather conditions, several buyers are now including it’s availability as part of the criteria for purchasing a house. Wonder why? This is simply because everyone wants to enjoy their garden all throughout the year. As a result of this high demand, adding this type of extension to your house can go a long way to increase it’s value. However, it’s very important to incorporate high quality materials during construction. With glass conservatories offering, on the average, up to £5,000 increase in value, the cheaper PVC alternative offers much less value and can also deter potential buyers.

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 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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