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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 2026

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 2026

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

House extensions searches in September 2026

House extensions Projects in Henley-on-thames in August 2026

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Requests for House extensions quotations in Henley-on-thames in August 2026. 0% change from July 2026.

110

Requests for House extensions quotations in Oxfordshire in August 2026. 10% change from July 2026.

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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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20 Oct

House Extensions

Reading - RG1

Enquiry from: Chytra G

Start Date: Immediate

Customer made enquiry for House Extension quotes online. Confirmed via SMS at 05:53 Homeowner lives in Reading area. Please call to arrange appointment

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01 Aug

House Extensions

Didcot - OX11

Enquiry from: James B

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downstairs toilet extension

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07 May

House Extensions

Didcot - OX11

Enquiry from: Adrian J

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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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FAQs

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.

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.

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.

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