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House Extension in city

House extension features a large range of advantages which makes it easy to see why the extension could be a terrific uptick in the possible rate of your residential or commercial property in regards to sales. So if you're seeking to build a new house extension but still not persuaded about the project, we're here to aid you. Being totally mindful any residence construction job is normally a heavy financial investment, there's a massive requirement to be set on your decision before setting up the commencement of any type of job. So are house extensions worth it? Below are a few of the top advantages used by house extensions to assist you make a decision if it's one of the most appropriate course for you.

 

What's Involved in Adding an Extension?

The actions will certainly vary relying on the extent of your extension, but you can expect some, if not all, of the listed below to be entailed when adding an expansion to your home:

 

  1. Acquiring Building Regulations or Planning Permission (if called for as the extension is larger than permitted development).
  2. Checking your leasehold arrangement (if relevant) to make certain you can do what you want to do.
  3. Enlisting an architect  to prepare the plans, considering your planned use (kitchen, washroom, study).
  4. Hiring a competent builder with experience of larger projects.
  5. Calling your insurance policy company to let them know of the prepared work ahead of it beginning.
  6. Getting vehicle parking allows if needed for your contractors to guarantee they have very easy accessibility to your residential property.
  7. Making certain all intended work falls within allowed allowables.
  8. Clearing up the space and digging deep into if required, consisting of the removal of trees.
  9. Structure job can start.

 

What is the price of a house extension in city?

If you're taking into consideration including a two floor house extension, after that setting a budget for this project would be a fantastic means to get started. Comparable to a back extension, a two storey extension typically leaves the rest of the building needing some job and also, because of its size, this may imply the re-development of the entire house - which is why they can be really pricey. A few of the various other influencing variables that can have big impact on a two floor house extension expense consists of: your place, the size of the build, complexity of the style (anything beyond the conventional construct will typically require even more know-how and also time), the glazing to be incorporated (the a lot more the glass made use of in the task, the much more the product price), as well as the team made use of.

Average House extensions cost in Grantham

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

House extensions installation cost in Grantham 2025

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

House extensions searches in May 2025

House extensions Projects in Grantham in April 2025

1,146

Requests for quotations in Grantham in April 2025

10

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

40

Requests for House extensions quotations in Lincolnshire in April 2025. -43% change from March 2025.

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

House extensions searches in cities and towns near Grantham April 2025

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Requests for quotations in Grantham in April 2025

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Grantham

Grantham is a market town in the South Kesteven region of Lincolnshire. The town possesses a populace of 34, 592 people, all located in 18,000 houses in the area. If you're searching for home developments in the future, make sure to make use of only vetted and trustworthy specialists in Grantham and look at quotations for the best price available on the market.

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House extensions pros in Grantham

Build Junky

3 review(s)
Based: in Doncaster, DN9 1AL

We are a high quality building company based on the outskirts of Doncaster. With an aim to produce consistent workmanship of the highest standard alongside giving our customers the very best service available. Alongside carrying ou...

Latest review

Ian B., DN4
5

House Extensions in Doncaster

Fantastic, Nobby and his boys still here and doing a brilliant job. I will be recommending them to anyone that needs hel...

Similar Customer Enquiries for House extensions in Grantham

02 Aug

House Extensions

Grantham - NG31

Enquiry from: Geeta S

Start Date: Immediate

customer in the grantham 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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29 Aug

House Extensions

Grantham - NG32

Enquiry from: Wendy H

Start Date: Immediate

We have Bradmore internal stables…I would like to discuss changing the doors and some alterations.

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27 Apr

House Extensions

Grantham - NG31

Enquiry from: Ray B

Start Date: Immediate

extension to rear of bungalow. size approx. 9m x 3m. flat roof with sky windows. wet underfloor heating. customer is currently in the process of looking for quotes to add a single storey extension to...

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20 Mar

House Extensions

Grantham - NG33

Enquiry from: Suzie B

Start Date: Immediate

I need someone to draw some plans and advise please.

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23 Feb

House Extensions

Grantham - NG31

Enquiry from: Michelle H

Start Date: Less than one month

are you the property owner: owner of the property other forms: kitchen design & installation, house extension agreed to receive quotes for selected products: yes please call to appoint

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23 Apr

House Extensions

Grantham - NG31

Enquiry from: Peter R

Start Date: 1 to 3 months

Pitched roof single story extension to rear of house. 3.5m x 8.5m Customer is currently in the process of looking for quotes to add a Single storey extension to their property. Are you the property o...

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21 Oct

House Extensions

Grantham - NG31

Enquiry from: Mehmet A

Start Date: Immediate

Pleaee contact to appoint

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17 May

House Extensions

Grantham - NG31

Enquiry from: Pete R

Start Date: Immediate

Rear extension 3.5M x 8M to extend Kitchen

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27 Sep

House Extensions

Grantham - NG31

Enquiry from: Joy C

Start Date: Immediate

Replace existing ground floor family room, utility and garage to form extension comprising of bedroom open plan sitting room / kitchen and bathroom / wet room. Are you the property owner: Relative of...

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28 Mar

House Extensions

Grantham - NG31

Enquiry from: Simon B

Start Date: Immediate

12 square metre single storey extension

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11 May

House Extensions

Grantham - NG32

Enquiry from: Danny P

Start Date: Immediate

Single storey extension about 4 metres x 3 metre at front of house bringing it in line with garage. Existing garage to become an additional room

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11 Apr

House Extensions

Grantham - NG31

Enquiry from: L A

Start Date: Immediate

Would like quotes for an extension

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09 Feb

House Extensions

Grantham - NG32

Enquiry from: Paul B

Start Date: Immediate

Large open plan kitchen, Diner, Snug Are you the property owner: Owner of the property Property Type: Detached Looking For: Double storey extension Do you have planning permission: Yes Do you have pla...

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29 Dec

House Extensions

Grantham - NG33

Enquiry from: B

Start Date: Immediate

Side extension, single story to bungalow with a pitch roof. Approx 5 metre wide and 4 metre depth

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20 Jul

House Extensions

Grantham - NG31

Enquiry from: Emma B

Start Date: Immediate

Home-owner Planning assistance may be required Single story extension 20' x 8' Full kitchen remodel Removal of conservatory Please call to appoint

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04 Jan

House Extensions

Grantham - NG32

Enquiry from: Paul P

Start Date: 3+ months

Homeowner House extension Double storey extension Detached Two-storey extension off main living area Plans available Supplied and installed Please contact to appoint

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FAQs

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.

Will my extension be expensive?

It depends on the size and type of extension. Small porches or flat roof extensions are very reasonably priced. More substantial two storey extensions can be expensive. In general, the price is roughly proportional to the amount of space you add to 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.

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.

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