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 £51,875 in Sidcup. Costs vary based upon the materials and the company picked. The upper price range can be as high as £72,000. The material costs are in most cases around£10,500.

Average price per House extensions job in 2025

Avg. price low

Avg. price low
£34,250

Avg. price

Avg. price
£51,875

Avg. price high

Avg. price high
£72,000

£72500

£54375

£36250

£18125

£0

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

House extensions installation cost in Sidcup 2025

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

House extensions searches in February 2025

House extensions Projects in Sidcup in January 2025

2,174

Requests for quotations in Sidcup in January 2025

10

Requests for House extensions quotations in Sidcup in January 2025. 11% change from December 2024.

120

Requests for House extensions quotations in Kent in January 2025. 9% change from December 2024.

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

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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

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.

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 Extensions 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 Extensions in Harrow

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

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22 Sep

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Are you the property owner: Owner of the property Property Type: Semi detached Looking For: Single storey extension Do you have planning permission: No Do you have plans drawn up: No Do you require Pl...

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17 May

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looking topurchase house and require a quote on a 2 story 40ft x 7 ft extension on side

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Rear dining room extension approx 15msq. Flat roof with roof window. Will require knock through to existing dining room/kitchen with support work. No additional kitchen/plumbing work.

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19 Jan

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Two storey extension. Bedroom kitchen extended bathroom and there's more. Are you the property owner: Owner of the property Property Type: Semi detached Looking For: Double storey extension Do you ha...

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26 Feb

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Enquiry from: Manasvi U

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I need to demolish old garage and build new one. This would be approximately 6.5 m long x 3 m wide and 2.5m( up to 3m) tall with pitched roof. I need to have cavity insulation with multiple electrical...

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25 Feb

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31 Jan

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Are you the property owner: Owner of the property Property Type: Terrace How many bedrooms does the property have: 3-4 Bedrooms Other Forms: 45, 63 Agreed to recieve quotes for selected products: Yes...

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FAQs

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 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.

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.

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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