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House extension comes with a wide variety of benefits which makes it very easy to see why the extension could be a excellent uptick in the prospective price of your property in terms of sales. So if you're aiming to develop a new residence extension yet still not convinced regarding the project, we're here to help you. Being fully aware any kind of house building and construction work is normally a hefty investment, there's a big demand to be set on your decision before setting up the beginning of any job. So are house extensions worth it? Below are several of the top advantages used by house extensions to help you make a decision if it's the most suitable course for you.

 

What's Associated with Adding an Extension?

The steps will vary relying on the range of your extension, but you can anticipate some, otherwise all, of the below to be included when including an expansion to your home:

 

  1. Acquiring Building Regulations or Planning Permission (if required as the extension is larger than permitted development).
  2. Inspecting your leasehold agreement (if applicable) to see to it you can do what you intend to do.
  3. Getting an architect  to draw up the plans, considering your planned use ( kitchen area, washroom, research study).
  4. Hiring a competent builder with experience of larger projects.
  5. Contacting your insurance coverage supplier to allow them understand of the intended job ahead of it starting.
  6. Getting parking allows if required for your specialists to guarantee they have simple access to your house.
  7. Seeing to it all planned job drops within allowed allowables.
  8. Cleaning the space as well as excavating if essential, consisting of the elimination of trees.
  9. Structure work can begin.

 

What is the cost of a house extension in city?

If you're considering including a two storey house extension, then setting a allocate this task would be a excellent way to get started. Similar to a back extension, a two storey extension typically leaves the rest of the structure requiring some job as well as, because of its size, this may suggest the re-development of the entire house - which is why they can be extremely expensive. Some of the various other influencing variables that can have big influence on a two floor house extension expense includes: your area, the dimension of the develop, complexity of the layout (anything beyond the common develop will typically call for more expertise as well as time), the glazing to be included (the much more the glass used in the job, the extra the product cost), in addition to the group used.

Average House extensions cost in Chalfont St Giles

The regular cost of House extensions are £44,375 in Chalfont St Giles. Costs vary based upon the materials and the company picked. The upper price range can be as high as £62,000. The material costs are in most cases around£10,500.

Average price per House extensions job in 2026

Avg. price low

Avg. price low
£29,250

Avg. price

Avg. price
£44,375

Avg. price high

Avg. price high
£62,000

£62500

£46875

£31250

£15625

£0

Prices based on actual House extensions costs for Chalfont St Giles, as reported by local LeadsDoWork members.

House extensions installation cost in Chalfont St Giles 2026

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

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Requests for House extensions quotations in Chalfont St Giles in June 2026. 0% change from May 2026.

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Chalfont St Giles

Chalfont St Giles is a village as well as civil parish within the Chiltern area in south east Buckinghamshire, England, on the edge of the Chilterns, 20.9 miles (33.6 kilometres) west-north-west of Charing Cross, main London, and also near Seer Green, Jordans, Chalfont St Peter, Little Chalfont and Amersham. Chalfont means chalk spring, of the water lugging abilities of the neighborhood surface. The town has a pond that is fed by the River Misbourne. In 2009, the village was awarded the European Diploma of the Council of Europe in recognition of its initiatives to circulate the concept of European unity.

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House extensions pros in Chalfont St Giles

Jassi Builders Ltd

2 review(s)
Based: in Hayes, UB4 9YD

Hi Jassi Builders LTD here, I am a specialist in planning, designing and building control services. I make sure that I have completed all my work on perfect time and leave customers in complete satisfaction. We do all types of loft conversions, exten...

Latest review

Julian F., HP2
4

House Extensions in Hemel Hempstead

No quote received

Dream the Build

19 review(s)
Based: in London, EC1V 2NX

DREAM the Build. Ltd ' Constructing your Vision Making home development exciting, fun and asset building experience , future proofing household & investors Who we are ? Starting fresh in a new country is never easy, but what we did Catal...

Latest review

Patricia Z., SE21
5

House Extensions in London

Great consultation by Catalin Spent a lot of time with us understanding the project and various options.

Tectra Partnership Ltd

1 review(s)
Based: in Slough, SL3 0JE

Latest review

Deepak S., KT10
5

House Extensions in Esher

excellent communication

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12 Nov

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Chalfont St. Giles - HP8

Enquiry from: Lee R

Start Date: Immediate

I need a number of drainpipes replaced with plastic ones. Are you the property owner: Owner of the property Property Type: Semi detached Would you like the windows supplied and installed: No Do you re...

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02 Sep

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22 Apr

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22 May

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Aylesbury - HP22

Enquiry from: Simon P

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16 May

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Aylesbury - HP22

Enquiry from: Simon P

Start Date: 1 to 3 months

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High Wycombe - HP11

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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.

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.

Can I extend the front of my house?

When it comes to extending a home, the rear of the house often comes to mind a lot more than the front. However, this doesn’t mean that you can’t extend the front of your house. This can be done either as part of a renovation project whereby the entire house is incorporated or it can also be done in isolation. It’s possible to extend the front of your house without the need to apply for a planning permission, however, there are a bunch of limitations you’d have to comply with if you wish to carry out with such a project. Sometimes, this may imply that extending to the front of your home is more tedious and tasking than extending your home’s rear. So exactly how far can you extend the front of your home without planning permission?

 

The short and simple answer to this question is 2 metres square area with a height not more than 3 metres. Generally, you do not need a planning permission to build a front porch as long as its area doesn’t go beyond 2 square metres from a public road or walkway. Also, a tiled or slated roof can be as much as 4 metres but other roofs must not go beyond 3 metres in height. If you want to extend the front of your home beyond the restrictions specified, then you’ll have to apply for a planning permission.

 

Extending the front of home can be quite costly, but this can be controlled by not building to the extension to the highest specification, not including an extension on kitchens or bathrooms and more.

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.

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