House Extension in city

Find House Extension Prices in city

Home > Extensions & Conversions Projects > House extensions > Portsmouth

House Extension in city

House extension features a large range of advantages which makes it very easy to see why the extension could be a great uptick in the possible rate of your home in regards to sales. So if you're looking to develop a new residence extension yet still not convinced concerning the project, we're right here to help you. Being fully mindful any type of house building work is usually a heavy investment, there's a significant requirement to be set on your choice before arranging the beginning of any job. So are house extensions worth it? Below are some of the leading advantages supplied by house extensions to aid you decide if it's the most ideal route for you.

 

What's Associated with Adding an Extension?

The actions will vary relying on the range of your extension, however you can anticipate some, otherwise all, of the listed below to be entailed when adding an extension to your house:

 

  1. Getting Building Regulations or Planning Permission (if needed as the extension is larger than permitted development).
  2. Inspecting your leasehold agreement (if appropriate) to see to it you can do what you wish to do.
  3. Employing an architect  to prepare the plans, considering your intended use ( kitchen area, bathroom, office).
  4. Hiring a competent builder with experience of larger projects.
  5. Calling your insurance coverage supplier to allow them understand of the planned work ahead of it starting.
  6. Getting parking permits if required for your service providers to guarantee they have simple access to your property.
  7. Making certain all intended job falls within permitted allowables.
  8. Clearing the space and also excavating if needed, consisting of the elimination of trees.
  9. Building work can start.

 

What is the expense of a house extension in city?

If you're taking into consideration including a 2 floor house extension, then setting a allocate this task would be a terrific way to get going. Similar to a rear extension, a two storey extension normally leaves the remainder of the building needing some work as well as, because of its size, this may suggest the re-development of the entire house - which is why they can be very expensive. Some of the various other affecting elements that can have large effect on a two floor house extension expense consists of: your place, the dimension of the develop, complexity of the style (anything past the standard build will usually call for even more knowledge and also time), the glazing to be integrated (the extra the glass used in the task, the much more the product cost), in addition to the group made use of.

Average House extensions cost in Portsmouth

The regular cost of House extensions are £50,000 in Portsmouth. 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 Portsmouth, as reported by local LeadsDoWork members.

House extensions installation cost in Portsmouth 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 Portsmouth in August 2026

6,538

Requests for quotations in Portsmouth in August 2026

10

Requests for House extensions quotations in Portsmouth in August 2026. 0% change from July 2026.

160

Requests for House extensions quotations in Hampshire in August 2026. 7% change from July 2026.

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

House extensions searches in cities and towns near Portsmouth August 2026

12

Requests for quotations in Gosport in August 2026

10

Requests for quotations in Bognor Regis in August 2026

10

Requests for quotations in Fareham in August 2026

10

Requests for quotations in Waterlooville in August 2026

10

Requests for quotations in Chichester in August 2026

Portsmouth

Portsmouth is a large city on the southerly coast of Britain and it's the 14th greatest urban region in the country. Portsmouth gained recognition from its port, which like lots of others in the UK, was greatly targeted in World War Two by German bombers. Much of the city has long been reconstructed over the last 60 years but we get lots of requests for top tradesmen in Portsmouth throughout the year in a number of home improvement categories.

Looking for House extensions in Portsmouth?

Get free quotes from local builders

Get free quotes

Similar Customer Enquiries for House extensions in Portsmouth

09 Jan

House Extensions

Portsmouth - PO6

Enquiry from: John G

Start Date: Immediate

2 x 3 metre walls from bungalow 5 metres of bi-fold doors across the front. pitched slate roof built into existing roof

Post a similar request >

12 Sep

House Extensions

Portsmouth - PO6

Enquiry from: Martin C

Start Date: Immediate

15 Mar

House Extensions

Portsmouth - PO2

Enquiry from: Grant C

Start Date: Less than one month

Hi. I am gathering quotes on alterations to an existing single storie extension. Basically the rear of the house has been extended, comprising of a conservatory & a utility room. This extension has be...

Post a similar request >

06 Feb

House Extensions

Portsmouth - PO3

Enquiry from: David H

Start Date: Immediate

Customer visited the myhouseextension.co.uk site and submitted an enquiry. Property type: Semi detached, Work description: 2 floor side extension

Post a similar request >

07 Dec

House Extensions

Portsmouth - PO6

Enquiry from: Paul W

Start Date: Immediate

am looking to put a single storey extension on the rear of my property to increase the size of my kitchen / diner.

Post a similar request >

23 Oct

House Extensions

Portsmouth - PO6

Enquiry from: Michelle P

Start Date: Immediate

Single storey ext to back of house with windows, French doors and velux windows in roof

Post a similar request >

03 Aug

House Extensions

Portsmouth - PO2

Enquiry from: Kevin P

Start Date: Immediate

Single story kitchen extension at rear of house spanning 6 metres wide by 5 metres deep

Post a similar request >

06 Apr

House Extensions

Portsmouth - PO2

Enquiry from: Simon C

Start Date: Immediate

Single story extension including steel calcs

Post a similar request >

04 Apr

House Extensions

Portsmouth - PO6

Enquiry from: Kevin C

Start Date: Immediate

Home owner Semi detached Single story extension - create more living space 5x7 mtr sq Plans and Planning permission being done Please Contact to Appoint *

Post a similar request >

04 Mar

House Extensions

Portsmouth - PO6

Enquiry from: Kevin C

Start Date: Immediate

Home owner Semi detached Single story extension - create more living space 5x7 mtr sq Plans and Planning permission being done Please Contact to Appoint *

Post a similar request >

22 Jan

House Extensions

Portsmouth - PO3

Enquiry from: Polly R

Start Date: Immediate

Home owner Semi detached Double extension - create more living space Assist with plans and planning permission Time scale: 1-3 months Please Contact to Appoint *

Post a similar request >

09 Nov

House Extensions

Portsmouth - PO6

Enquiry from: S M

Start Date: Immediate

Homeowner Two storey extension Extension front Porch - 6m*2m Extension Back - 7.5m*5m - double storey Renovate Master Bathroom upstairs Renovate Kitchen Downstairs Supplied and installed Plea...

Post a similar request >

03 Aug

House Extensions

Portsmouth - PO1

Enquiry from: Derek S

Start Date: 3+ months

Build single garage with option for possible storage or office extension on plot at rear of house and garden. Are you the property owner: Owner of the property Property Type: Semi detached Do you h...

Post a similar request >

10 May

House Extensions

Portsmouth - PO3

Enquiry from: Paul C

Start Date: Immediate

Extension Are you the property owner: Owner of the property Looking For: Single storey extension Do you have planning permission: No Would you require assistance to gain this: Yes Do you have pla...

Post a similar request >

26 Jan

House Extensions

Portsmouth - PO6

Enquiry from: Harry M

Start Date: 3+ months

Home owner Rear single story extension with approximate floor plan dimensions of 6m x 3m. Hlease 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 Portsmouth

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

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

Do I need my neighbours’ permission for an extension?

Well the reality is, sometimes, neighbours just don’t get along. With several individuals living in close proximity, it’s little surprise they tend to get on one another’s nerves from time to time. However, there’s a difference between having a tiff and being able to transform your house the way you want without having to obtain your neighbour’s approval.

The short and simple answer to this question is, not necessarily. However, you must first educate yourself by thinking about your extension and how it affects the houses around you. We’d strongly recommend you talk proposals through with your neighbour so as to avoid possible conflicts later. There are a number of reasons why your neighbour can protest to your new home extension plans. Let’s take a look!

 

  • In the event whereby your new extension is blocking their view or providing an unwanted shade on their property. Here, they have a legitimate reason to protest as no one would want their once sunny garden suddenly covered or plummet into shade.
  • In the event where it leads to a loss of privacy. For instance, if your new extension possesses a window which overlooks the neighbour’s property in any way. This is likely to be taken as an invasion of privacy and that has a little to no chance of being a welcomed idea.
  • If it’s a major project and going to take a lot of weeks before completion. The noise generated, especially when your neighbours are enjoying your summer holidays or weekends, can make their gardens not as relaxing as it used to be.
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 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.

House extensions

Other Top Projects in Portsmouth

Customer Reviews

Overall rating:


Portsmouth House extensions installers are rated 4 out of 5 based on 2 reviews of 20 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 Portsmouth House extensions contractors

Are you a builder in Portsmouth?

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

Join today