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House extension includes a wide variety of benefits that makes it very easy to see why the extension could be a great uptick in the possible rate of your residential property in regards to sales. So if you're seeking to construct a new house extension however still not persuaded regarding the job, we're below to aid you. Being fully aware any type of residence building and construction job is generally a hefty investment, there's a substantial requirement to be set on your decision prior to setting up the start of any work. So are house extensions worth it? Below are a few of the leading advantages offered by house extensions to aid you decide if it's one of the most suitable route for you.

 

What's Associated with Building an Extension?

The steps will certainly differ depending upon the range of your extension, but you can expect some, if not all, of the listed below to be included when including an extension to your house:

 

  1. Obtaining Building Regulations or Planning Permission (if needed as the extension is larger than permitted development).
  2. Checking your leasehold contract (if relevant) to make sure you can do what you wish to do.
  3. Enlisting an architect  to prepare the plans, considering your expected use (kitchen, shower room, study).
  4. Hiring a competent builder with experience of larger projects.
  5. Calling your insurance company to allow them recognize of the intended work ahead of it beginning.
  6. Obtaining vehicle parking allows if needed for your professionals to ensure they have easy accessibility to your residential property.
  7. Making certain all prepared job drops within allowed allowables.
  8. Clearing the area as well as excavating if required, consisting of the elimination of trees.
  9. Building job can begin.

 

What is the price of a house extension in city?

If you're taking into consideration adding a 2 storey house extension, after that setting a budget for this project would be a great means to start. Similar to a rear extension, a two storey extension normally leaves the remainder of the structure requiring some job as well as, as a result of its size, this might suggest the re-development of the entire house - which is why they can be extremely pricey. Several of the various other affecting factors that can have big influence on a two floor house extension cost consists of: your location, the size of the develop, intricacy of the layout (anything beyond the common build will typically call for more competence and time), the glazing to be included (the much more the glass made use of in the project, the much more the product price), in addition to the group utilized.

Average House extensions cost in Henley-on-thames

The regular cost of House extensions are £44,167 in Henley-on-thames. 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 Henley-on-thames, as reported by local LeadsDoWork members.

House extensions installation cost in Henley-on-thames 2025

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

House extensions searches in February 2025

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Requests for House extensions quotations in Henley-on-thames in January 2025. 0% change from December 2024.

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Henley-on-thames

Henley-on-Thames is a town and civil parish on the River Thames in the English county of Oxfordshire. It is set about 7 miles (11 kilometres) northeast of Reading and 7 miles west of Maidenhead. One of its limits has the tripoint of Oxfordshire, Berkshire and Buckinghamshire. It encompasses an area of around 2.15 square miles. In accordance with the 2011 Census, the town has a permanent population of around 11619 people. The first record of Henley is from 1179, when it is recorded that King Henry II 'had actually purchased land for the making of buildings'. King John bestowed the manor of Benson and the town and manor of Henley to Robert Harcourt in 1199. The existing Thursday market, it is believed, was approved by a charter of King John. A market was definitely in existence by 1269, despite the fact that the jurors of the assize of 1284 asserted to not know by what warrant the earl of Cornwall held a market and fair in the town of Henley. The existing Corpus Christi fair was approved by a charter of Henry VI. Henley is a world-renowned centre for rowing. Each summer, the annual Henley Royal Regatta is held on Henley Reach, which is a naturally straight region of the river just north of the town. It was extended synthetically. The event ended up being 'Royal' in 1851, when Prince Albert became patron of the regatta. The River and Rowing Museum, based in Mill Meadows, is the town's one museum. It was formed in 1998, and formally opened by Queen Elizabeth II. The museum, developed by the designer David Chipperfield, showcases info on the River Thames, the sport of rowing, and the town of Henley itself. For all your house renovations, make certain to identify dependable experts in Henley-on-Thames to make certain of quality.

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House extensions pros in Henley-on-thames

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.

Similar Customer Enquiries for House extensions in Henley-on-thames

22 Apr

House Extensions

Henley-on-Thames - RG9

Enquiry from: Alex P

Start Date: Immediate

homeowner house extension please call to appoint

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17 Mar

House Extensions

Henley-on-Thames - RG9

Enquiry from: Jamie C

Start Date: Immediate

Double storey extension and loft conversion with bathroom and kitchen Are you the property owner: Owner of the property Property Type: Terrace Looking For: Double storey extension Do you have plannin...

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16 Mar

House Extensions

Henley-on-Thames - RG9

Enquiry from: Ac V

Start Date: Immediate

Two storey extension plus conservatory at Wilson Road, henley on thames. Customer is currently in the process of looking for quotes to add a Double storey extension to their property. Are you the pro...

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19 Jan

House Extensions

Henley-on-Thames - RG9

Enquiry from: M

Start Date: Immediate

2 storey extension. 6.4m wide by 11.4m deep total 73 sq m. if I could get a price for the shell including plastering. comprises of utility, living room,2 bedrooms 1 bath and 1 ensuite. fitting of all ...

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20 Oct

House Extensions

Henley-on-Thames - RG9

Enquiry from: Dotan K

Start Date: Immediate

Double extension, remove of old garage Please Call to Appoint

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21 May

House Extensions

Henley-on-Thames - RG9

Enquiry from: Mika R

Start Date: Immediate

Home Owner We are extending our house with 1 1/2 storey and balcony. I have counted the new wall area is ~93m2, double skinned block work with ~6m2 facial brick work. Site has easy access. Footings ...

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06 May

House Extensions

Henley-on-Thames - RG9

Enquiry from: E Z

Start Date: 3+ months

I would to extend my house by adding a double extension from.garage to garden. Homeowner Will need assistance with planning permission Plans will need to be drawn up Please contact to appoint

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21 Mar

House Extensions

Henley-on-Thames - RG9

Enquiry from: Rob B

Start Date: Immediate

Rear single storey extension plus further wall/chimney removal between rooms Are you the property owner: Owner of the property Looking For: Single storey extension Do you have planning permission: ...

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07 May

House Extensions

Didcot - OX11

Enquiry from: Adrian J

Start Date: Immediate

Second storey SIPS side extention above kitchen. 6 x 2.5 m. For bedroom and bathroom.

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15 May

House Extensions

Didcot - OX11

Enquiry from: Adrian J

Start Date: Immediate

Extention above kitchen 6m x 2.5m with bedroom and bathroom.

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15 Nov

House Extensions

Reading - RG2

Enquiry from: Dwrey M

Start Date: Immediate

need to build single story extension which is 2.5metres in length and 3 m wide so multiplexing gives 7.5sqm of area are you the property owner: owner of the property property type: semi detached looki...

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10 Nov

House Extensions

Reading - RG30

Enquiry from: Simon C

Start Date: Immediate

Homeowner House extension Please call to appoint

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01 Mar

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Reading - RG30

Enquiry from: Anita R

Start Date: Immediate

miss requested quotes for house extension from a builder around reading. they are considering a couple of projects at the moment.call anytime to arrange appointment to discuss. the information below i...

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17 Nov

House Extensions

Reading - RG4

Enquiry from: Cheryl R

Start Date: Immediate

Take down loft conversion and create new 1 at floor, same area as ground floor, with 3 bedrooms, all en- suite, and a pitched roof. I would like an estimate of costs, and if this can be done.

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13 Jul

House Extensions

Reading - RG30

Enquiry from: Derrick J

Start Date: Immediate

customer made an online enquiry for house extension and confirmed on sms and email they would like a call with a builder to discuss prices.please call to arrange an appointment to quote. are you the p...

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14 Jun

House Extensions

Reading - RG4

Enquiry from: Faten J

Start Date: Immediate

Add a second storey to a bungalow with total floor area of 67 square meters.

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29 May

House Extensions

Wallingford - OX10

Enquiry from: Neil H

Start Date: Immediate

Building on a concrete flat roofed single brick workshop attached to main house. Approx 4m x 4m. One window and doorway from main house landing. Flat roof when finished.

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20 Apr

House Extensions

Thame - OX9

Enquiry from: Marnix T

Start Date: 1 to 3 months

bungalow needs new floor, added floor to convert into a dutch style barn with curved, corrugated roof. black cladding, good insulation. the curve span is 8.5 meters, length is 11.5 meters. quote for t...

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15 Mar

House Extensions

Reading - RG2

Enquiry from: Aditya S

Start Date: Immediate

i have the architectural drawings for the extensions and need the building regulations to be submitted to council. are you the property owner: owner of the property looking for: single storey extensio...

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08 Mar

House Extensions

Oxford - OX44

Enquiry from: Bethany L

Start Date: Immediate

Hello, I'm hoping to get a quote for a single story extension to the side and rear of a two bedroom house. The estimated size is 15m2 but I can provide current and proposed floor plans. The extensi...

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FAQs

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.

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.

when do you need planning permission for a house extension?

If you’re planning on adding a house extension to your property, you’d probably be worried about whether or not your proposed extension would require a planing permission. Well, it may be relieving to know that not every house extension project would require a formal consent, and in fact, several extensions are covered by the permitted development rights. Not only can this save you a considerable amount of time especially at the project’s planning phase, but it’ll also save you money on the application fee. In the UK, single storey extensions to the house’s rear can be 3 metres deep for both semi detached houses and terraces or 8 metres deep for detached homes.

So how do you know when you’d require a planning permission for your home extension? Well, if your extension plan fits these criteria explained below, then your project is most likely going to be allowable as a permitted development.

• Extensions, which includes previous additions, must not go beyond half of the original house’s total surrounding land area.

• The main elevation, or side elevation where it fronts the highway, must not be extended forward.

• For single storeys, the rear additions must not extend more than the original house’s rear by more than 3 metres in both semi attached homes and terraces (4 metres for detached houses).

• Extensions to the side must be a single storey with a height not exceeding 4 metres and not going beyond 50% of the original house’s width.

• Extensions hat within 2 metres of a boundary should have a eaves height not more than 3 metres.

• Multi storey addition must not extend beyond the original house’s rear wall by a maximum of 3 metres or 7 metres of the boundary opposite the rear wall.

• Permitted development rights do not apply in listed buildings or designated areas.

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.

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