House Extension in city

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House Extension in city

House extension features a large range of benefits that makes it easy to see why the extension could be a great uptick in the prospective cost of your residential or commercial property in regards to sales. So if you're aiming to build a brand-new home extension but still not encouraged concerning the project, we're here to help you. Being totally conscious any type of residence building job is usually a heavy financial investment, there's a significant need to be set on your decision prior to setting up the start of any kind of work. So are house extensions worth it? Below are some of the top benefits provided by house extensions to aid you choose if it's one of the most suitable route for you.

 

What's Associated with Including an Extension?

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

 

  1. Acquiring Building Regulations or Planning Permission (if required as the extension is larger than permitted development).
  2. Inspecting your leasehold agreement (if suitable) to make sure you can do what you wish to do.
  3. Enlisting an architect  to draw the plans, considering your planned use ( kitchen area, shower room, office).
  4. Hiring a competent builder with experience of larger projects.
  5. Contacting your insurance supplier to let them recognize of the planned work ahead of it starting.
  6. Getting vehicle parking allows if needed for your specialists to guarantee they have simple access to your home.
  7. Ensuring all prepared work falls within allowed allowables.
  8. Clearing up the space as well as digging deep into if needed, including the elimination of trees.
  9. Building job can start.

 

What is the price of a house extension in city?

If you're thinking about including a two storey house extension, then establishing a budget for this job would be a fantastic method to begin. Comparable to a rear extension, a two floor extension generally leaves the rest of the building needing some work and, as a result of its size, this may suggest the re-development of the whole house - which is why they can be extremely expensive. Some of the other influencing factors that can have large effect on a 2 storey house extension expense includes: your area, the size of the construct, intricacy of the design (anything past the common develop will typically require even more knowledge and also time), the glazing to be incorporated (the extra the glass used in the project, the a lot more the material cost), in addition to the group utilized.

Average House extensions cost in Sidcup

The regular cost of House extensions are £50,500 in Sidcup. Costs vary based upon the materials and the company picked. The upper price range can be as high as £69,600. The material costs are in most cases around£10,500.

Average price per House extensions job in 2026

Avg. price low

Avg. price low
£33,400

Avg. price

Avg. price
£50,500

Avg. price high

Avg. price high
£69,600

£70100

£52575

£35050

£17525

£0

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

House extensions installation cost in Sidcup 2026

Labour cost £27,000
Material cost £10,500
Waste removal £2,500
Time frame: 10-14 weeks
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House extensions on Google in Sidcup

Google searches that showed Local Quotes, 17 July to 14 October 2026

1,838

Searches that showed one of our pages for Sidcup, all services

Source: Google Search Console, the number of times our pages appeared in Google search results. It counts searches that showed the page, not quote requests.

Sidcup

The London borough of Sidcup is towards the eastern side on the capital city and possesses a population boasting more than 60,000. In Sidcup there are a mixture of Victorian and Edwardian homes alongside the standard 1930s suburbia semi-detached and detached housing. A great deal of the open space and parks remain to show continuing evidence of the large properties and estates which were previously in the area. For the property improvements you're contemplating, ensure that you use only vetted experts from Sidcup for the greatest price and a good finish.

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House extensions pros in Sidcup

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 Extension in London

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

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 Extension in Hemel Hempstead

No quote received

Options Home Improvements LTD

1 review(s)
Based: in Kent, ME8 0DB

Here at Options Home Improvements we specialize is the bespoke design & installation of PVCu & Aluminium, windows and doors, orangeries & conservatories in Gillingham, Kent & South East area. Options Home Improvements was started due to the seemi...

Latest review

Lisa V., ME1
5

House Extension in Rochester

I haven't had the extension built yet but am planning to use them

Nicholas James Construction

7 review(s)
Based: in Bromley, BR1 3AX

From past fifteen years we have been established as the finest building and construction service provider to clients in Bromley and its surrounding areas.

Latest review

Jagdish K., HA3
5

House Extension in Harrow

Absolutely pleasant appointment. Very patient and polite, listened carefully to detail and more of my background and his...

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FAQs

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.

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 an extension add value to my home?

Yes. Most extensions will add substantial value to your home, and you may find that the extension adds more value than it cost. However, it’s important to be sure that the home remains balanced. Extending your garage and leaving your property with no parking spaces, for example, may impact your ability to sell.

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