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House Extension in city

House extension comes with a large range of benefits that makes it easy to see why the extension could be a fantastic uptick in the prospective price of your home in terms of sales. So if you're looking to build a brand-new home extension yet still not encouraged about the task, we're right here to help you. Being completely aware any home building and construction work is typically a hefty investment, there's a substantial requirement to be set on your choice prior to scheduling the start of any job. So are house extensions worth it? Below are several of the leading benefits supplied by house extensions to assist you determine if it's one of the most suitable route for you.

 

What's Associated with Including an Extension?

The steps will vary relying on the scope of your extension, but you can anticipate some, otherwise all, of the listed below to be included when adding an extension to your residence:

 

  1. Obtaining Building Regulations or Planning Permission (if called for as the extension is larger than permitted development).
  2. Examining your leasehold arrangement (if appropriate) to ensure you can do what you intend to do.
  3. Employing an architect  to create the plans, considering your expected usage ( kitchen area, shower room, research study).
  4. Hiring a competent builder with experience of larger projects.
  5. Contacting your insurance coverage carrier to allow them understand of the planned job ahead of it starting.
  6. Obtaining car parking allows if needed for your specialists to guarantee they have very easy access to your house.
  7. Making certain all prepared job drops within allowed allowables.
  8. Clearing up the space and digging deep into if essential, consisting of the elimination of trees.
  9. Structure work can begin.

 

What is the expense of a house extension in city?

If you're taking into consideration adding a two storey house extension, then setting a allocate this job would certainly be a terrific method to start. Similar to a rear extension, a 2 storey extension generally leaves the rest of the building needing some job and, due to its size, this might suggest the re-development of the whole house - which is why they can be very expensive. A few of the other influencing factors that can have big influence on a 2 floor house extension expense includes: your area, the dimension of the develop, complexity of the design (anything past the common build will typically need more competence as well as time), the glazing to be integrated (the more the glass made use of in the job, the extra the material price), in addition to the group used.

Average House extensions cost in Lewisham

The regular cost of House extensions are £53,000 in Lewisham. Costs vary based upon the materials and the company picked. The upper price range can be as high as £75,600. The material costs are in most cases around£10,500.

Average price per House extensions job in 2025

Avg. price low

Avg. price low
£32,400

Avg. price

Avg. price
£53,000

Avg. price high

Avg. price high
£75,600

£76100

£57075

£38050

£19025

£0

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

House extensions installation cost in Lewisham 2025

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

House extensions searches in April 2025

House extensions Projects in Lewisham in March 2025

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Requests for quotations in Lewisham in March 2025

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Requests for House extensions quotations in Lewisham in March 2025. 0% change from March 2025.

1,000

Requests for House extensions quotations in London County in March 2025. 14% change from March 2025.

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

House extensions searches in cities and towns near Lewisham March 2025

Lewisham

The London Borough of Lewisham is a London borough in south-east London, England and forms a part of Inner London. The borough wasformed in 1965, by the London Government Act 1963, as an amalgamation of the former area of the Metropolitan Borough of Lewisham and the Metropolitan Borough of Deptford, which had been created in 1900 as divisions of the County of London. Nonetheless, minor boundary adjustments have occurred since its creation. The most substantial amendments were made in 1996, when the former area of the Royal Docks in Deptford was transferred from the London Borough of Greenwich.

The principal settlement in the borough is Lewisham. The borough covers a total area of approximately 13.57 square miles. It is enclosed by the Royal Borough of Greenwich towards the east, the London Borough of Bromley to the south and also the London Borough of Southwark to the west. The River Thames forms a short section of northern boundary together with the Isle of Dogs in the London Borough of Tower Hamlets. Deptford Creek, Pool River, River Quaggy and River Ravensbourne pass via the borough.

As outlined by population estimates made in the middle of 2014, Lewisham is a borough with roughly 291933 permanent residents. About 43 per cent of homes are owner-occupiers. The Prime Meridian passes through Lewisham. Blackheath, Goldsmiths, University of London and Millwall F.C. are located inside the borough.

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House extensions pros in Lewisham

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...

LW Building Service

2 review(s)
Based: in London, SE20 8AG

Latest review

Rosa S., SE20
3

House Extensions in London

I have not yet finalised quotation

JPA Building Construction LTD

1 review(s)
Based: in Twickenham , TW1 1AG

Latest review

Rosa S., SE20
5

House Extensions in London

Very nice and helpful unfortunately I am looking for a builder who lives nearby my property

Similar Customer Enquiries for House extensions in Lewisham

02 Mar

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Enquiry from: Amir A

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Customer made enquiry for House Extension quotes online. Homeowner lives in London area. Please call to arrange appointment

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Customer made an online enquiry for House Extension via one of our websites. Confirmed via . Please call to arrange an appointment to quote.

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customer requested quotes for house extension from a builder around london. they are considering a couple of projects at the moment.call anytime to arrange appointment to discuss. the information belo...

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customer in the london area made an enquiry a couple of projects including house extension.call anytime and arrange an appointment to discuss. below is some details about this project: are you the pro...

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20 May

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London - SE15

Enquiry from: Madeline D

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customer in london areas is looking to do a couple of projects at the moment, and would like quotes for house extension.confirmed interest via sms and email at 20/05/2023 07:06.please call to arrange ...

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04 Mar

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customer in the london area made an enquiry a couple of projects including house extension.call anytime and arrange an appointment to discuss. below is some details about this project: are you the pro...

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Enquiry from: Lucas S

Start Date: Less than one month

customer made an enquiry for house extension via one of our websites. looking at various options they would like to discuss directly confirmed interest via phone at 16:50 please call to discuss and a...

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18 Sep

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I'm looking for a 3m deep, 5.2M wide extension with a roof light, to create one bedroom and small dining room.

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13 May

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Bromley - BR1

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mr requested quotes for house extension from a builder around bromley. they are considering a couple of projects at the moment.call anytime to arrange appointment to discuss. the information below is ...

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homeowner needs advice on options upvc supply and install please call to arrange an appointment to quote are you the property owner: owner what level of service do you require: design, supply & instal...

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30 Apr

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London - SE15

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customer in london areas is looking to do a couple of projects at the moment, and would like quotes for house extension.confirmed interest via telephone and email at 30/04/2021 13:15.please call to ar...

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12 Apr

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London - SE12

Enquiry from: Jamie J

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side return, 1.5*6.5m, removal of toilet, installation of bifold doors (4m). customer is currently in the process of looking for quotes to add a single storey extension to their property. are you the...

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06 Mar

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London - SE4

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I require an idea of a ballpark cost to build a 3 storey side extension to a property wiylth footprint of approximately 10m x 4m. The build will include a half basement which will likely be built ...

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27 Feb

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London - SE4

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i require an idea of a ballpark cost to build a 3 storey side extension to a property wiylth footprint of approximately 10m x 4m. the build will include a half basement which will likely be built fr...

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07 Feb

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London - SE4

Enquiry from: Emmanuel E

Start Date: Immediate

I require an idea of a ballpark cost to build a 3 storey side extension to a property wiylth footprint of approximately 10m x 4m. The build will include a half basement which will likely be built ...

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02 Feb

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Bromley - BR1

Enquiry from: Gary M

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side extension bungalow and into loft conversion width 21ft by 50ft length. are you the property owner: owner of the property looking for: single storey extension do you have planning permission: no d...

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19 Jan

House Extensions

Bromley - BR1

Enquiry from: Gary M

Start Date: Immediate

side extension bungalow and into loft conversion width 21ft by 50ft length. are you the property owner: owner of the property looking for: single storey extension do you have planning permission: no d...

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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 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 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.

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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