House Extension in city

Find House Extension Prices in city

Home > Extensions & Conversions Projects > House extensions > Grantham

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 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 Grantham, as reported by local LeadsDoWork members.

House extensions installation cost in Grantham 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 Grantham in May 2026

1,146

Requests for quotations in Grantham in May 2026

10

Requests for House extensions quotations in Grantham in May 2026. 0% change from April 2026.

40

Requests for House extensions quotations in Lincolnshire in May 2026. -43% change from April 2026.

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

House extensions searches in cities and towns near Grantham May 2026

40

Requests for quotations in Nottingham in May 2026

10

Requests for quotations in Grantham in May 2026

10

Requests for quotations in Mansfield in May 2026

7

Requests for quotations in Sutton-in-ashfield in May 2026

4

Requests for quotations in Newark in May 2026

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.

Looking for House extensions in Grantham?

Get free quotes from local builders

Get free quotes

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...

Post a similar request >

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.

Post a similar request >

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...

Post a similar request >

20 Mar

House Extensions

Grantham - NG33

Enquiry from: Suzie B

Start Date: Immediate

I need someone to draw some plans and advise please.

Post a similar request >

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

Post a similar request >

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...

Post a similar request >

21 Oct

House Extensions

Grantham - NG31

Enquiry from: Mehmet A

Start Date: Immediate

Pleaee contact to appoint

Post a similar request >

17 May

House Extensions

Grantham - NG31

Enquiry from: Pete R

Start Date: Immediate

Rear extension 3.5M x 8M to extend Kitchen

Post a similar request >

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...

Post a similar request >

28 Mar

House Extensions

Grantham - NG31

Enquiry from: Simon B

Start Date: Immediate

12 square metre single storey extension

Post a similar request >

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

Post a similar request >

11 Apr

House Extensions

Grantham - NG31

Enquiry from: L A

Start Date: Immediate

Would like quotes for an extension

Post a similar request >

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...

Post a similar request >

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

Post a similar request >

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

Post a similar request >

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

Post a similar request >

Local & reliable builders near me

Tell us about your house extensions project

Answer a few quick questions, so we can match you with local builders who can help.

Find up to 4 builders in Grantham

Get free, no-obligation local house extensions quotes from 4 verified builders working in Grantham.

Hire with confidence

Compare customer reviews, services and prices, and choose the right tradesperson for you.

Our reviews

Average

Would highly recommend

Would highly recommend, they found me a firm which I was happy with a quote they give me and went ahead and had my job done within 2 days of enquiring.

Good easy way to find a selection of…

Good easy way to find a selection of trades you need all in one place.

Love Local Quotes it's a big part of my …

Love Local Quotes it's a big part of my Business I would recommend to anyone

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.

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.

how much does a two storey house extension cost?

If you’re considering adding a two storey house extension, then setting a budget for this project would be a great way to get started. Similar to a rear extension, a two storey extension usually leaves the rest of the building needing some work and, due to its size, this may imply the re-development of the entire house - which is why they can be very costly. Some of the other influencing factors that can have big impact on a two storey house extension cost includes: your location, the size of the build, complexity of the design ( anything beyond the standard build will normally require more expertise and time), the glazing to be incorporated ( the more the glass used in the project, the more the material cost), as well as the team used.

Generally, when it comes to extensions, the major part of the expenses will be made on the build of the project. This is because it doesn’t only cover the material cost but also the contractor’s overhead as well as the daily rates. At this stage, the extension prices can be determined by the standard of the work that’s being done.

For a fairly average room size of about 18 square metre, the two storey extension should cost within the range of £2,500 to £3,000 per square metre - with the range being determined by the finishes incorporated. Therefore, a two storey extension of about 18 square metre should cost within the range of £45,000 to £55,000. However, this is with the assumption that there are standard window sizes, bathroom suits are modest, and without any need for any purpose joinery or glazing. If you wish to include all these extra features you’ll also have to pay more to make the total cost between £70,000 to £80,000.

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.

House extensions

Other Top Projects in Grantham

Customer Reviews

Overall rating:


Grantham House extensions installers are rated 4.5 out of 5 based on 6 reviews of 27 pros.
The LeadsDoWork rating and review is an overall rating based on verified reviews and feedback from the customers with House extensions projects that have been connected with House extensions pros to help them. All House extensions contractors All Grantham House extensions contractors

Are you a builder in Grantham?

We can help you get more house extensions work with our qualified job leads and boost your business.

Join today