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House Extension in city

House extension includes a large range of advantages which makes it easy to see why the extension could be a excellent uptick in the prospective rate of your building in regards to sales. So if you're looking to build a new residence extension but still not convinced regarding the task, we're here to help you. Being completely conscious any residence building job is typically a heavy financial investment, there's a significant demand to be set on your decision before scheduling the commencement of any type of job. So are house extensions worth it? Below are a few of the top advantages supplied by house extensions to assist you make a decision if it's the most ideal route for you.

 

What's Involved in Adding an Extension?

The steps will differ depending upon the extent of your extension, but you can anticipate some, otherwise all, of the listed below to be included when adding an extension to your house:

 

  1. Obtaining Building Regulations or Planning Permission (if called for as the extension is larger than permitted development).
  2. Examining your leasehold contract (if suitable) to ensure you can do what you wish to do.
  3. Getting an architect  to draw the plans, considering your expected use ( kitchen area, shower room, office).
  4. Hiring a competent builder with experience of larger projects.
  5. Contacting your insurance provider to allow them recognize of the intended work ahead of it beginning.
  6. Getting auto parking permits if required for your contractors to ensure they have very easy accessibility to your residential building.
  7. Seeing to it all planned work falls within permitted allowables.
  8. Clearing the space as well as excavating if essential, consisting of the removal of trees.
  9. Building job can start.

 

What is the expense of a house extension in city?

If you're considering adding a 2 floor house extension, then establishing a allocate this task would be a wonderful method to begin. Similar to a rear extension, a 2 storey extension typically leaves the rest 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. Several of the various other affecting aspects that can have large impact on a 2 floor house extension cost consists of: your area, the size of the construct, intricacy of the layout (anything past the typical construct will generally require more competence as well as time), the glazing to be included (the more the glass made use of in the job, the more the material price), as well as the team utilized.

Average House extensions cost in Longfield

The regular cost of House extensions are £50,500 in Longfield. 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 Longfield, as reported by local LeadsDoWork members.

House extensions installation cost in Longfield 2026

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

House extensions searches in July 2026

House extensions Projects in Longfield in June 2026

193

Requests for quotations in Longfield in June 2026

1

Requests for House extensions quotations in Longfield in June 2026. 0% change from May 2026.

120

Requests for House extensions quotations in Kent in June 2026. 9% change from May 2026.

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

House extensions searches in cities and towns near Longfield June 2026

17

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10

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Requests for quotations in Dartford in June 2026

10

Requests for quotations in Welling in June 2026

Longfield

Longfield is a village as well as civil church in the Borough of Dartford in Kent, England. It is located 6 miles (10 kilometres) south-east of Dartford and the same range south-west of Gravesend. The village consists of several stores, a pub, and also a 14th-century church. It is recorded in the Domesday Book and also the Anglo-Saxon charters of 964-995. Longfield and also New Barn is a civil parish called after the surrounding villages it covers, the eastern component being New Barn, it additionally covers the smaller negotiation, the neighbourhood of Longfield Hill. Longfield is the ancient town, located on the road between Dartford and Meopham; the historic church there is devoted to St Mary Magdalene. New Barn is larger in population than Longfield, although has little bit in the way of services, being a relatively recent development and totally domestic in nature.

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House extensions pros in Longfield

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...

Similar Customer Enquiries for House extensions in Longfield

09 Feb

House Extensions

Longfield - DA3

Enquiry from: Michele W

Start Date: Immediate

are you the property owner: owner have you considered getting your windows replaced to match a new conservatory: yes how many windows are you looking for: 2 windows other forms: house extension agree...

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20 Oct

House Extensions

Longfield - DA3

Enquiry from: John S

Start Date: Immediate

Extension to rear of bungalow of 2.5m deep X 7.5 wide. remove existing back wall with pitched tiled roof

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24 Jan

House Extensions

Longfield - DA3

Enquiry from: Amber S

Start Date: 1 to 3 months

we are looking to have an extension to the rear of our house and side Are you the property owner: Owner of the property Property Type: Other Looking For: Double storey extension Do you have planning ...

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09 Oct

House Extensions

Longfield - DA3

Enquiry from: Brogan C

Start Date: Immediate

Double storey extension

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31 Jul

House Extensions

Longfield - DA3

Enquiry from: Brogan C

Start Date: Immediate

Double storey extension

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27 May

House Extensions

Longfield - DA3

Enquiry from: Simon B

Start Date: Immediate

Covert a 3 bedroom bungalow to a two or three floors 5bedrooms house. Ground floor with study, one reception and the family room at the back that runs the entire length of the house. The kitchen with ...

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06 Mar

House Extensions

Longfield - DA3

Enquiry from: Andy H

Start Date: Immediate

Property owner House extension Double extension Supplied and fitted Please call to appoint

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02 Mar

House Extensions

Longfield - DA3

Enquiry from: Andy H

Start Date: Immediate

Two storey extention on back of house to create more rooms and bigger rooms

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17 Feb

House Extensions

Longfield - DA3

Enquiry from: Stefan P

Start Date: Immediate

Homeowner Double storey extension incorporating a 1st floor double bedroom and a ground floor lounge area. Supplied and installed Please contact to appoint *

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05 Feb

House Extensions

Longfield - DA3

Enquiry from: Jayne L

Start Date: Immediate

Home Owner Property type: Detached, Work description: 12 foot by 12 foot extension on dining room Please Call to Appoint

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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.
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.

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.

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.

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