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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 £44,167 in Chalfont St Giles. Costs vary based upon the materials and the company picked. The upper price range can be as high as £62,667. The material costs are in most cases around£10,500.

Average price per House extensions job in 2025

Avg. price low

Avg. price low
£29,000

Avg. price

Avg. price
£44,167

Avg. price high

Avg. price high
£62,667

£63200

£47400

£31600

£15800

£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 2025

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

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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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Aylesbury - HP22

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High Wycombe - HP13

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High Wycombe - HP13

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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.

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.

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.

where to start with a house extension?

Have you decided to improve your property instead of moving? The common problem most homeowners face after deciding to embark on a home extension project is not knowing where to start. In this article we’ll walk you through everything you need to consider and put in place before commencement of your home extension project.

• Is the extension worth it?

Before breaking the bank, you must be sure that the project will add good value to your home. In terms of “value, this is not only limited to the financial gain after disposal of the property, but also several other juicy benefits to be derived from extending your home like an extra living space for the household to spread out and more.

• Do you need a planning permission?

Check with your local authority to determine whether or not you’ll require to submit an application. You can also consult a building expert like an architect for advice.

• What are the building regulation?

Even though planning permission can be dodged, you can not avoid building regulations. These regulations are the set national minimum standards for construction and design which you must comply with to ensure the safety of the individuals in and around it.

• Who will design the extension?

You have to decided whether you’ll hire a professional architect to design the extension or not.

• Who will manage the building work?

If your home extension project is designed and built by a professional company, they’ll be responsible for the management. However, if you decide to use an architect or designed it yourself, you’ll have to hire a main contractor to manage the build.

• How to set the budget?

There are so many factors that can affect the cost of an extension, so it’s better to get the costs from your builder before proceeding.

• Do I need yo inform my home insurance firm?

Absolutely! This is very important as the new extension may affect the rebuilding cost of your property which could have an impact on the policy premium.

• Do I need to inform my neighbours?

It’s very important to discuss your plan with your neighbours before applying for a planning permission and communicate about the concerns they might have.

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