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House Extension in city

House extension features a vast array of benefits which makes it easy to see why the extension could be a great uptick in the possible cost of your building in regards to sales. So if you're wanting to construct a new residence extension but still not convinced concerning the task, we're right here to assist you. Being fully mindful any type of residence construction job is typically a heavy investment, there's a massive requirement to be set on your choice prior to setting up the start of any work. So are house extensions worth it? Below are some of the leading benefits provided by house extensions to assist you determine if it's the most appropriate course for you.

 

What's Associated with Including an Extension?

The steps will vary relying on the scope of your extension, but you can expect some, otherwise all, of the below to be involved when adding an extension to your house:

 

  1. Getting Building Regulations or Planning Permission (if needed as the extension is larger than permitted development).
  2. Checking your leasehold contract (if relevant) to make certain you can do what you intend to do.
  3. Hiring an architect  to draw up the plans, considering your planned use ( kitchen area, washroom, study).
  4. Hiring a competent builder with experience of larger projects.
  5. Contacting your insurance policy supplier to let them know of the intended job ahead of it beginning.
  6. Acquiring car park permits if needed for your specialists to ensure they have easy access to your residential building.
  7. Ensuring all intended work drops within permitted allowables.
  8. Clearing up the space as well as digging deep into 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 two floor house extension, then establishing a budget for this project would be a wonderful method to get going. Comparable to a back extension, a two storey extension normally leaves the remainder of the building requiring some job and, due to its size, this might suggest the re-development of the whole house - which is why they can be extremely costly. Several of the various other influencing factors that can have huge effect on a two storey house extension price consists of: your area, the dimension of the build, intricacy of the style (anything beyond the basic build will normally call for even more knowledge and time), the glazing to be integrated (the more the glass utilized in the job, the more the product expense), in addition to the team used.

Average House extensions cost in Harlow

The regular cost of House extensions are £50,625 in Harlow. Costs vary based upon the materials and the company picked. The upper price range can be as high as £67,000. The material costs are in most cases around£10,500.

Average price per House extensions job in 2026

Avg. price low

Avg. price low
£36,750

Avg. price

Avg. price
£50,625

Avg. price high

Avg. price high
£67,000

£67500

£50625

£33750

£16875

£0

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

House extensions installation cost in Harlow 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 Harlow in June 2026

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10

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

90

Requests for House extensions quotations in Essex in June 2026. -10% change from May 2026.

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

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Harlow

The Essex town of Harlow has a populace of 82,200 and forms part of the Greater london commuter belt. Harlow includes a land area of 11.79 sq . miles, giving it a population density of 6,970 people per square miles. In an attempt to handle London's overspill there's been significant redevelopment within the Harlow area. Make sure to keep your home up-to-date with improvements from vetted and trustworthy industry professionals in Harlow and have the best prices and a high quality finish.

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House extensions pros in Harlow

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 Harlow

15 Jun

House Extensions

Harlow - CM20

Enquiry from: Kate S

Start Date: Less than one month

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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29 Jan

House Extensions

Harlow - CM18

Enquiry from: Alexandra T

Start Date: Immediate

customer in harlow area has requested that we arrange quotes for their house extension project.they are considering various options and would like to discuss with a builder directly.please call to dis...

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10 Sep

House Extensions

Harlow - CM17

Enquiry from: Richard R

Start Date: Immediate

customer in harlow areas is looking to do a couple of projects at the moment, and would like quotes for house extension.confirmed interest via online.please call to arrange appointment are you the pro...

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22 Jun

House Extensions

Harlow - CM20

Enquiry from: Rita R

Start Date: Immediate

customer in harlow 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 22/06/2022 00:13.please call to arrange ...

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11 Apr

House Extensions

Harlow - CM20

Enquiry from: Marjan C

Start Date: Immediate

rear dormer loft conversion with low ceiling height of about 2.1m, chimney breast to be removed in loft and 1st floor. adding 2 beds and a shower room. customer is currently in the process of looking...

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14 Jul

House Extensions

Harlow - CM18

Enquiry from: Anna 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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11 May

House Extensions

Harlow - CM20

Enquiry from: Violeta G

Start Date: Immediate

customer in harlow 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 11/05/2021 15:30.please call to arrange ...

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30 Oct

House Extensions

Harlow - CM19

Enquiry from: Barney W

Start Date: Immediate

4mx4m rear extension as a living room. sips panel /quick and efficient build are you the property owner: owner of the property property type: semi detached looking for: single storey extension do you...

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24 Jul

House Extensions

Harlow - CM17

Enquiry from: Paul D

Start Date: 1 to 3 months

extension 7mtr x 3.5 meter pitch roof with tiles, rendered finish, plaster skim internal, vault ceilings, 10x flush downlight. 3meter bi gold door to rhs two wi ndows , 1 to front, 1 to lhs flank wa...

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01 Feb

House Extensions

Harlow - CM20

Enquiry from: Lucy L

Start Date: 1 to 3 months

single storey extension off kitchen diner with downstairs toilet and small utility cupboard Are you the property owner: Owner of the property Property Type: Terrace Looking For: Single storey extensio...

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21 Oct

House Extensions

Harlow - CM17

Enquiry from: Daisy P

Start Date: 1 to 3 months

Outer building with sewage manhole covered in, drainage for wet room, basin and toilet, bathroom window, double window, partition with internal door and new opening from house to extension where windo...

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21 Sep

House Extensions

Harlow - CM17

Enquiry from: Alan L

Start Date: Less than one month

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 property Property Type: Semi detached Looking Fo...

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03 Apr

House Extensions

Harlow - CM17

Enquiry from: Daisy P

Start Date: 1 to 3 months

Side single storey extension 3x7m Separated into 2 rooms a wet room with toilet and basin at the front of the house with an entrance to the bedroom (the is a sewage manhole) Are you the property ow...

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19 Mar

House Extensions

Harlow - CM20

Enquiry from: Zsolt A

Start Date: Immediate

Extension at the rear of the house, it will be used as a study room. It will be built on half of the property, in front of the living room. Dimensions won't exceed the permitted development dimensi...

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11 Sep

House Extensions

Harlow - CM18

Enquiry from: Julie H

Start Date: Immediate

Upper storey extension above existing ground floor extension, footings adequate to build up. 2 en suite bathrooms. 1 room with a vaulted ceiling Are you the property owner: Owner of the property Prope...

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22 Apr

House Extensions

Harlow - CM18

Enquiry from: Julie H

Start Date: Immediate

I already have a ground floor extension and wish to build above, the footings from the original extension were dug deep enough to allow for a 2nd storey to be added. Approx total are 35m2 Are you the ...

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06 Apr

House Extensions

Harlow - CM18

Enquiry from: Julie H

Start Date: Immediate

Build a first floor extension over existing extension, approx 35msq original extension foundations were dug to accommodate a further storey Are you the property owner: Owner of the property Property T...

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13 Dec

House Extensions

Harlow - CM20

Enquiry from: Michael E

Start Date: Immediate

We want to install a mezzanine floor and minstrel gallery in a community sports building

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02 Nov

House Extensions

Harlow - CM17

Enquiry from: B O

Start Date: Less than one month

Are you the property owner: Owner of the property Have you considered getting your windows replaced to match a new conservatory: No Are you looking for Conservatory blinds: Yes Other Forms: 45 Agreed...

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21 Jul

House Extensions

Harlow - CM19

Enquiry from: Renu W

Start Date: 3+ months

Extension on a house

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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 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.

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.

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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