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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 excellent uptick in the potential price of your residential or commercial property in regards to sales. So if you're wanting to construct a new home extension but still not convinced about the task, we're below to help you. Being totally conscious any kind of home construction work is normally a heavy investment, there's a substantial demand to be set on your choice prior to scheduling the beginning of any kind of work. So are house extensions worth it? Below are several of the top advantages offered by house extensions to assist you decide if it's one of the most ideal path for you.

 

What's Associated with Adding an Extension?

The steps will vary depending on the extent of your extension, however you can expect some, otherwise all, of the listed below to be included when including an expansion to your residence:

 

  1. Obtaining Building Regulations or Planning Permission (if required as the extension is larger than permitted development).
  2. Examining your leasehold contract (if suitable) to see to it you can do what you intend to do.
  3. Employing an architect  to create the plans, considering your intended use ( kitchen area, washroom, office).
  4. Hiring a competent builder with experience of larger projects.
  5. Calling your insurance supplier to let them recognize of the prepared job ahead of it beginning.
  6. Getting parking allows if needed 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. Cleaning the area and excavating if necessary, consisting of the elimination of trees.
  9. Structure job can begin.

 

What is the expense of a house extension in city?

If you're thinking about including a two storey house extension, then setting a allocate this job would certainly be a excellent way to begin. Similar to a rear extension, a two storey extension generally leaves the remainder of the building needing some job as well as, because of its size, this might imply the re-development of the whole house - which is why they can be really expensive. Several of the various other affecting variables that can have huge influence on a two floor house extension expense consists of: your area, the dimension of the develop, intricacy of the style (anything beyond the basic develop will normally call for more knowledge as well as time), the glazing to be integrated (the extra the glass utilized in the project, the much more the product expense), along with the team utilized.

Average House extensions cost in Blackburn

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

House extensions installation cost in Blackburn 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 Blackburn in August 2026

4,308

Requests for quotations in Blackburn in August 2026

10

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

290

Requests for House extensions quotations in Lancashire in August 2026. -15% change from July 2026.

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

House extensions searches in cities and towns near Blackburn August 2026

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Blackburn

The Lancashire town of Blackburn features a populace of around 105,000 and is found to the north of the West Pennine Moors. Blackburn played a significant part in the Industrial Revolution and was one of the first industrialised towns in the world. Be sure to use respectable companies in Blackburn for your home enhancements.

Looking for House extensions in Blackburn?

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House extensions pros in Blackburn

Magnus Technical Engineering LTD

6 review(s)
Based: in Appley bridge, WN6 9DB

Latest review

Vic F., SK23
5

House Extensions in High Peak

Excellent and professional approach.

Similar Customer Enquiries for House extensions in Blackburn

18 Mar

House Extensions

Blackburn - BB1

Enquiry from: Suzanne C

Start Date: Immediate

What type of property is this for? House What type of extension do you need? Single storey extension When was the property built? 1921 to 1979 How many stories is the current building? 2 Storeys D...

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17 May

House Extensions

Blackburn - BB2

Enquiry from: Sajjid S

Start Date: Immediate

customer has a extensions & conversions project they are looking to have done, specially they want quotes for house extension. they are unsure of options so would like to discuss with a builder.confir...

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10 Nov

House Extensions

Blackburn - BB2

Enquiry from: Nabeela A

Start Date: Immediate

are you the property owner: owner of the property how many windows do you require: what level of service do you require: supply and fit other forms: house extension agreed to receive quotes for selec...

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17 Apr

House Extensions

Blackburn - BB2

Enquiry from: Rokeya B

Start Date: Immediate

Are you the property owner: Owner Have you considered getting your windows replaced to match a new conservatory: No Other Forms: Kitchen Design & Installation, House Extension, New Build Homes Agreed ...

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17 Feb

House Extensions

Blackburn - BB2

Enquiry from: Muhammad B

Start Date: Less than one month

This is actually to build a flat no brick work involved rather plasterboards etc Are you the property owner: Owner of the property Looking For: Single storey extension Do you have planning permission:...

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07 Aug

House Extensions

Blackburn - BB1

Enquiry from: Mohammad A

Start Date: Immediate

Remove old garage witch is 20 m2 solid brick and roof felt.

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19 Apr

House Extensions

Blackburn - BB1

Enquiry from: Matthew S

Start Date: Immediate

Upper kitchen extension with an attic conversion

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07 Apr

House Extensions

Blackburn - BB1

Enquiry from: Sameeha P

Start Date: Immediate

build new kitchen behind the garage. no knockdown needed. use space next to dining room outside which is covered in patio stone.

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18 Oct

House Extensions

Blackburn - BB1

Enquiry from: Zubair R

Start Date: Immediate

Are you the property owner: Owner of the property Property Type: Detached Other Forms: 45 Agreed to recieve quotes for selected products: Yes Please call to appoint

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10 Jul

House Extensions

Blackburn - BB2

Enquiry from: Siama M

Start Date: 1 to 3 months

Put room on top off existing kitchen and slight size extension to be added to length and width to get two bedrooms on top and widen existing kitchen Are you the property owner: Owner of the property...

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11 Mar

House Extensions

Blackburn - BB2

Enquiry from: Jane S

Start Date: Immediate

5mtrs x 3mtrs extension to rear of house with sloping roof and two velux windows. Are you the property owner: Owner of the property Looking For: Single storey extension Do you have planning permissi...

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07 Mar

House Extensions

Blackburn - BB2

Enquiry from: Graham L

Start Date: Less than one month

two storeyy rear extension plans passed Customer is currently in the process of looking for quotes to add a Double storey extension to their property. Are you the property owner: Owner of the propert...

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15 Feb

House Extensions

Blackburn - BB2

Enquiry from: Graham L

Start Date: Less than one month

double storey rear extension semi detached property plans approved Customer is currently in the process of looking for quotes to add a Double storey extension to their property. Are you the property ...

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05 Feb

House Extensions

Blackburn - BB2

Enquiry from: Stephen T

Start Date: Less than one month

I need a down stairs extension as I am now not able to manage stairs dew to disability I need a down stairs bedroom and a wet room single story at the side of are semi detached home. Are you the prope...

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21 Jan

House Extensions

Blackburn - BB2

Enquiry from: Graham L

Start Date: 1 to 3 months

two storey rear extension on detached house 4mtrs depth x5 metreswide bottom floor 3mtrs depth top floor x 5mtrs wide planning approved Are you the home owner? yes Property Style? Semi detached...

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28 Oct

House Extensions

Blackburn - BB6

Enquiry from: Peter S

Start Date: Immediate

Single storey rear extension

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05 Oct

House Extensions

Blackburn - BB6

Enquiry from: Warren M

Start Date: 1 to 3 months

I'm looking at having two corner brick walls removed from the ground floor of my house and replacing them with bi-fold aluminium doors. Need a price please Are you the property owner: Owner of the p...

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25 Jul

House Extensions

Blackburn - BB1

Enquiry from: Irfan M

Start Date: Immediate

Home owner Double Storey Extension on the drive in line with garage. Extend width of garage and convert into Kitchen and a room above garage. And convert existing kitchen into Lounge. Assist with p...

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11 Jul

House Extensions

Blackburn - BB1

Enquiry from: Irfan M

Start Date: Immediate

Double Storey Extension on the drive in line with garage. Extend width of garage and convert into Kitchen and a room above garage. And convert existing kitchen into Lounge.

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30 Jun

House Extensions

Blackburn - BB2

Enquiry from: Jomon M

Start Date: Immediate

Home owner 2 story Single extension - new bedrooms upstairs, down stairs living room Plans in place, planning permission being approved Please Contact Appoint *

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FAQs

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.

how to finance a house extension?

Do you want to beautify and increase the value of your home? If yes, a refurb and house extension is definitely a great option to consider. Depending on your home extension project, the value that’ll be added to your home’s resale value varies. However, the cost of completing a house extension project can be huge, so you just might want to consider your financing options. Fortunately, there are various options through which your house extension project can be funded with each having its own pros and cons. Your specific circumstances will determine the one that’s going to work best for you, so let’s take a look at some of the best options to help you fund your project.

• Home Remortgaging

The process whereby a mortgage is transferred from one provider to the other is known as remortgaging. This is usually done to generate funds for a project by entering a more lengthy repayment term commitment when switching. If you want to raise your funds in a quick manner, this process works best.

• Savings

This is a good reason to cultivate a good saving habits. If you’ve been able to save up some mega bucks then you’d probably won’t have to borrow money to finance your house extension.

• Unsecured Loans

If you do not buy into the idea of borrowing more against your property, you may just be able to apply for an unsecured loan especially if you have a good credit record. A secured loan makes use of collaterals like a car or house to serve as a cover for the lender, meanwhile an unsecured loan is based mainly on the credit managing history of the borrower.

• Credit Card

There are some great benefits that comes with financing your small or medium scale extension project with your credit card. Not only does it offer some real lifeline if problems arise during the project, but you can also avoid paying excessive interest on the investment by ensuring your deal has a 0% introductory rate.

Will my extension be expensive?

It depends on the size and type of extension. Small porches or flat roof extensions are very reasonably priced. More substantial two storey extensions can be expensive. In general, the price is roughly proportional to the amount of space you add to your home.

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