House Extension in city

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House Extension in city

House extension features a wide range of advantages which makes it very easy to see why the extension could be a fantastic uptick in the prospective cost of your residential property in terms of sales. So if you're wanting to develop a brand-new residence extension but still not persuaded about the job, we're below to assist you. Being totally aware any type of home building job is generally a heavy financial investment, there's a big demand to be set on your choice before scheduling the beginning of any kind of job. So are house extensions worth it? Below are some of the top advantages used by house extensions to assist you choose if it's one of the most suitable course for you.

 

What's Involved in Adding an Extension?

The steps will vary relying on the range of your extension, yet you can anticipate some, otherwise all, of the listed below to be involved when adding an expansion to your residence:

 

  1. Acquiring Building Regulations or Planning Permission (if needed as the extension is larger than permitted development).
  2. Inspecting your leasehold contract (if appropriate) to see to it you can do what you wish to do.
  3. Hiring an architect  to create the plans, considering your expected use ( kitchen area, washroom, research study).
  4. Hiring a competent builder with experience of larger projects.
  5. Contacting your insurance supplier to allow them recognize of the intended job ahead of it starting.
  6. Obtaining car park permits if needed for your service providers to ensure they have easy accessibility to your residential property.
  7. Making sure all prepared work falls within allowed allowables.
  8. Clearing up the area as well as excavating if essential, consisting of the elimination of trees.
  9. Building work can begin.

 

What is the expense of a house extension in city?

If you're taking into consideration adding a 2 floor house extension, then setting a budget for this job would be a excellent method to begin. Similar to a rear extension, a 2 floor extension generally leaves the remainder of the building needing some job as well as, due to its dimension, this may imply the re-development of the entire house - which is why they can be very pricey. A few of the other affecting aspects that can have huge impact on a 2 storey house extension expense includes: your area, the size of the build, complexity of the layout (anything past the common construct will normally need even more proficiency and time), the glazing to be incorporated (the much more the glass utilized in the task, the more the material cost), as well as the group utilized.

Average House extensions cost in Welwyn Garden City

The regular cost of House extensions are £51,875 in Welwyn Garden City. 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 Welwyn Garden City, as reported by local LeadsDoWork members.

House extensions installation cost in Welwyn Garden City 2025

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

House extensions searches in June 2025

House extensions Projects in Welwyn Garden City in May 2025

1,825

Requests for quotations in Welwyn Garden City in May 2025

11

Requests for House extensions quotations in Welwyn Garden City in May 2025. 0% change from April 2025.

130

Requests for House extensions quotations in Hertfordshire in May 2025. 0% change from April 2025.

We noted 1,825 requests for property quotations within Welwyn Garden City. Of these quotation requests the number of house extensions quotes within Welwyn Garden City was 11. Quotatis would have been able to match these customers with up to four suitable contractors who were available for work in Welwyn Garden City during those times. Request a free property survey from trustworthy companies in Welwyn Garden City.

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

House extensions searches in cities and towns near Welwyn Garden City May 2025

35

Requests for quotations in St Albans in May 2025

11

Requests for quotations in Welwyn Garden City in May 2025

10

Requests for quotations in Harpenden in May 2025

7

Requests for quotations in Hatfield in May 2025

1

Requests for quotations in Welwyn in May 2025

Welwyn Garden City

Welwyn Garden City is a town inside the Welwyn Hatfield borough of Hertfordshire. It's unique as both a garden city in addition to a new town, with a populace of 43,252, and it is located just twenty miles from London within East England. With its traditional importance, Welwyn Garden City attracts many visitors all through the year. For the right price for the next project do a comparison of quotations from vetted companies in Welwyn and make sure a high quality finish for the work you would like carried out.

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House extensions pros in Welwyn Garden City

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.

Similar Customer Enquiries for House extensions in Welwyn Garden City

25 Sep

House Extensions

Welwyn Garden City - AL7

Enquiry from: Halima T

Start Date: Immediate

Customer is looking for House Extension quotes. They are unsure of options so would like to discuss. Confirmed interest via SMS//phone Customer lives in Welwyn Garden City area Please call to arrange...

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27 Apr

House Extensions

Welwyn Garden City - AL7

Enquiry from: Manuel P

Start Date: Immediate

customer in welwyn garden city areas is looking to do a couple of projects at the moment, and would like quotes for house extension.confirmed interest via email at 27/04/2021 17:59.please call to arra...

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08 May

House Extensions

Welwyn Garden City - AL7

Enquiry from: Richard B

Start Date: Immediate

11sqm ground floor extension with first floor extension approx 12msq

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09 Dec

House Extensions

Welwyn Garden City - AL7

Enquiry from: Scott W

Start Date: Immediate

We live in a terrace house that is roughly 6 metres wide with the kitchen and living room spanning across the 6 metres. We would like to extend the back of the house by approx 3 metres and the full si...

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08 Nov

House Extensions

Welwyn Garden City - AL7

Enquiry from: Rey T

Start Date: 1 to 3 months

Porch with brick 1.5x2.5 Are you the property owner: Owner of the property Do you have planning permission: No What material are you looking for: uPVC What material would you like the roof made from...

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10 Oct

House Extensions

Welwyn Garden - AL8

Enquiry from: Matthew F

Start Date: Immediate

4th bed and bathroom extension

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08 Sep

House Extensions

Welwyn Garden - AL8

Enquiry from: Helen G

Start Date: Immediate

Knock down existing single storey extension, erect new single storey extension with pendant roof light or flat roof light (cost dependent) Customer is currently in the process of looking for quotes ...

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04 Sep

House Extensions

Welwyn Garden City - AL7

Enquiry from: Cindy J

Start Date: Less than one month

Demolish garage. Rebuild garage with bedroom above. Are you the property owner: Owner of the property Property Type: Semi detached Do you have planning permission: No Looking For: Double storey extens...

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06 Mar

House Extensions

Welwyn Garden - AL8

Enquiry from: Jack N

Start Date: Immediate

Property owner House extension Supplied and fitted Please call top appoint

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05 Mar

House Extensions

Welwyn Garden - AL8

Enquiry from: Jack N

Start Date: Immediate

Single story above the garage and extension behind the house. Are you the property owner: Owner of the property Property Type: Semi detached Do you have planning permission: Yes Do you have plans draw...

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21 Nov

House Extensions

Welwyn Garden City - AL7

Enquiry from: H

Start Date: Immediate

Extenstion to Living room towards garden. I wanted to consider a conservatory, However, wanted to check how much would be cost to go for extension with brick walls instead of conservatory. Also, do we...

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26 Oct

House Extensions

Welwyn Garden - AL8

Enquiry from: SHAMMI F

Start Date: 3+ months

Remodel kitchen to be open plan with the extension

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26 Aug

House Extensions

Welwyn Garden City - AL7

Enquiry from: Sarah K

Start Date: Immediate

1. Single storey room extension 3m2 in total including fitting of 2 radiators, electrics inc light fixtures, sockets/RJ45 and coaxial satellite cable TV cabling , bi fold screen doors, 3 velux windows...

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20 May

House Extensions

Welwyn Garden - AL8

Enquiry from: Luke L

Start Date: 3+ months

Single storey rear extension to kitchen Homeowner Please contact to appoint

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11 May

House Extensions

Welwyn Garden City - AL7

Enquiry from: James K

Start Date: Immediate

2-storey extension, moving and remodelling the kitchen. Potentially also expanding and remodelling the bathroom. Are you the property owner: Owner of the property Property Type: Other Looking For: Dou...

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12 Apr

House Extensions

Welwyn Garden City - AL7

Enquiry from: Oliver K

Start Date: Immediate

Hi I'm looking to convert a bungalow into a 2 storey house in Welwyn Garden City and I was hoping for an idea of what the cost might be. The square footage of the bungalow is circa 1248 sq ft and I...

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11 Apr

House Extensions

Welwyn Garden City - AL7

Enquiry from: Amber O

Start Date: Immediate

To possibly build a ground floor extension out the back and possibly extend to the side first floor.

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05 Dec

House Extensions

Welwyn Garden City - AL7

Enquiry from: Belinda J

Start Date: Immediate

Kitchen Remodelling and conservatory replacement Are you the property owner: Owner of the property Looking For: Single storey extension Do you have planning permission: Yes Do you have plans drawn up:...

Post a similar request >

22 Jun

House Extensions

Welwyn Garden City - AL7

Enquiry from: Peter S

Start Date: 3+ months

Customers description : 5m x 3m extension single story. Flat roof with roof lantern Bifold doors approx 4-5m across width of extension Are you the property owner: Owner of the property Property Ty...

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01 Mar

House Extensions

Welwyn Garden - AL8

Enquiry from: Keith W

Start Date: Immediate

Flat roof rear extension, to replace large bay window therefore existing opening, approx 4m x 4m to butt onto same extension size next door Double glazed French doors and window to garden

Post a similar request >

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FAQs

Can I extend the front of my house?

When it comes to extending a home, the rear of the house often comes to mind a lot more than the front. However, this doesn’t mean that you can’t extend the front of your house. This can be done either as part of a renovation project whereby the entire house is incorporated or it can also be done in isolation. It’s possible to extend the front of your house without the need to apply for a planning permission, however, there are a bunch of limitations you’d have to comply with if you wish to carry out with such a project. Sometimes, this may imply that extending to the front of your home is more tedious and tasking than extending your home’s rear. So exactly how far can you extend the front of your home without planning permission?

 

The short and simple answer to this question is 2 metres square area with a height not more than 3 metres. Generally, you do not need a planning permission to build a front porch as long as its area doesn’t go beyond 2 square metres from a public road or walkway. Also, a tiled or slated roof can be as much as 4 metres but other roofs must not go beyond 3 metres in height. If you want to extend the front of your home beyond the restrictions specified, then you’ll have to apply for a planning permission.

 

Extending the front of home can be quite costly, but this can be controlled by not building to the extension to the highest specification, not including an extension on kitchens or bathrooms and more.

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.

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 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.

House extensions

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