Loft Conversion in Knebworth

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Loft conversion companies in Knebworth

In need of loft conversion specialists in Knebworth? Our loft area conversion renovators in Knebworth are able to offer you the best quotations to have a loft transformed in your property or home.

The installation of a attic extension in the house can be completed swiftly, enabling you to make full use of the altered room and start benefitting from an extra room. The loft conversion will be carried out by a vetted, certified company and as soon as this has been finished you'll be capable to start using the new region right away. With your newly modified loft you'll be able to have an extra bedroom, study or maybe a rec room.

With a variety of loft conversion styles you'll be in a position to discover something that suits your taste, whilst being practical and appealing.

We shall offer you no obligation quotations from attic transformation firms in Knebworth who will be able to supply you free of charge surveys and quotations on your conversion. Then you're able to contrast these attic room conversion costs and guarantee to get the best value for your money.

Average Loft conversion cost in Knebworth

The regular cost of a Loft conversion is £25000. Costs differ based upon the materials and the firm selected. The upper price range can be as high as £28750. The material costs are mainly approximately £6250

Average price per Loft conversion job in 2025

Avg. price low

Avg. price low
£18,750

Avg. price

Avg. price
£25,000

Avg. price high

Avg. price high
£28,750

£29300

£21975

£14650

£7325

£0

Prices based on actual Loft conversion costs for Knebworth, as reported by local LeadsDoWork members.

Loft conversion installation cost in Knebworth 2025

Labour cost £17,500
Material cost £6,250
Waste removal £1,250
Time frame: 6-12 weeks

Loft conversion searches in June 2025

Loft conversion Projects in Knebworth in May 2025

81

Requests for quotations in Knebworth in May 2025

1

Requests for Loft conversion quotations in Knebworth in May 2025. 0% change from April 2025.

370

Requests for Loft conversion quotations in Hertfordshire in May 2025. 0% change from April 2025.

We noted 81 requests for house quotes within Knebworth. Of these quote requests the number of loft conversion quotes within Knebworth was 1. Quotatis would have been in a position to match these consumers with up to 4 suitable fitters who were available for work in Knebworth during that time. Request a free house survey from reliable companies in Knebworth.

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

Loft conversion searches in cities and towns near Knebworth May 2025

10

Requests for quotations in Stevenage in May 2025

10

Requests for quotations in Hertford in May 2025

10

Requests for quotations in Shefford in May 2025

10

Requests for quotations in Baldock in May 2025

10

Requests for quotations in Biggleswade in May 2025

Knebworth

Knebworth is a village as well as civil parish in the north of Hertfordshire, England, quickly south of Stevenage. The civil parish covers an area in between the villages of Datchworth, Woolmer Green, Codicote, Kimpton, Whitwell, St Paul's Walden and also Langley, and also includes the town of Knebworth, the little village of Old Knebworth and also Knebworth House. There is evidence of people staying in the location as far back as Neolithic times and also it is stated in the Domesday Book of 1086 where it is described as Chenepeworde (the farm belonging to the Dane, Cnebba) with a population of 150. The original town, now referred to as Old Knebworth, created around Knebworth House. Advancement of the newer Knebworth town started in the late 19th century centred a mile to the eastern of Old Knebworth on the new railway station and also the Great North Road (consequently the A1, as well as now the B197 since the opening of the A1(M) freeway in 1962). At the millenium the designer Edwin Lutyens developed Homewood, southeast of Old Knebworth, as a dower home for Edith Bulwer-Lytton. Her little girl, the suffragette Constance Lytton also lived there, till prior to her fatality in 1923. Knebworth has, given that 1974, been notoriously connected with various significant outdoors rock as well as pop concerts at Knebworth House, consisting of Queen's final real-time efficiency which happened on 9 August 1986 as well as attracted an attendance approximated at 125,000, Lynyrd Skynyrd, Oasis playing to a quarter of a million people for 2 evenings in 1996 and also more recently Robbie Williams, who for 3 nights in August 2003 carried out to the biggest groups ever assembled for a solitary performer. Stats from UK Census 2011: All Residents: 5,247.

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Loft conversion pros in Knebworth

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

A., NW7
4

Conversion | Loft in London

Good quote

Unique Lofts LTD

2 review(s)
Based: in South mimms, EN6 3NX

Professional loft conversions at Unique Lofts, we are a specialist loft company with over 15 years of experience in construction. Call us today.

Latest review

Alan P., EN11
5

Conversion | Loft in Hoddesdon

only company that quoted

London Project Management Ltd Ta Modern Attics

1 review(s)
Based: in London, N3 2DN

Modern ATTICS specialise in loft conversions and House Extensions. We cover all areas of London - North, East, West, Central and South London.

Latest review

Helen W., NW4
4

Conversion | Loft in London

Nice guy

Similar Customer Enquiries for Loft conversion in Knebworth

20 May

Conversion | Loft

Knebworth - SG3

Enquiry from: Chris M

Start Date: Immediate

Customer made an enquiry for Loft Conversion via one of our websites. Looking at various options they would like to discuss directly Confirmed interest Please call to discuss and arrange appointment t...

Post a similar request >

04 May

Conversion | Loft

Knebworth - SG3

Enquiry from: Chris M

Start Date: Immediate

loft conversion bedroom with ensuite Are you the property owner: Owner of the property Property Type: Detached What are you looking to convert the space into: Bedroom/s Are you looking to have stair...

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06 Jan

Conversion | Loft

Waltham Cross - EN7

Enquiry from: Bukurie H

Start Date: Immediate

customer made an enquiry for loft conversion and confirmed on the local quotes site they would like quotes from a builder.mrs lives in the waltham cross area and would like a call to discuss options.s...

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18 Apr

Conversion | Loft

Radlett - WD7

Enquiry from: Elaine G

Start Date: Immediate

Flat or prefab roof dormer window to existing loft.

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11 Jun

Conversion | Loft

St. Albans - AL2

Enquiry from: Claudine S

Start Date: Immediate

a dormer hip to gable added to the attic bedroom already in the property are you the property owner: owner of the property property type: terrace what are you looking to convert the space into: other ...

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28 Mar

Conversion | Loft

Barnet - EN5

Enquiry from: Dinu S

Start Date: Immediate

homeowner loft conversion- no previous quotes please call to appoint

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29 Jan

Conversion | Loft

Hatfield - AL9

Enquiry from: Andy K

Start Date: Immediate

I need to add 2 Dorma windows to my existing loft conversion

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21 Dec

Conversion | Loft

St. Albans - AL1

Enquiry from: Rod L

Start Date: Immediate

convert back-facing side of existing velux loft extension to a dormer with two windows, in order to add additional space through head height and conversion of the eaves. room is approx 3.3m long and w...

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27 Sep

Conversion | Loft

Waltham Cross - EN8

Enquiry from: Daniel F

Start Date: Immediate

to build a staircase from the landing above the turn in the stairs to the loft with door access. are you the property owner: owner of the property property type: terrace what are you looking to conver...

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25 Jul

Conversion | Loft

St. Albans - AL2

Enquiry from: Janice P

Start Date: Immediate

dormer conversion with two enviornments(2 rooms). Each being 50cubic meters or less. One will be a bed room and the other a music room study/ office study. PLease let me know if this is possible. And ...

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25 Dec

Conversion | Loft

Waltham Cross - EN8

Enquiry from: Sam J

Start Date: Immediate

Loft saricase like this https://www.stairbox.com/stairbuilder/top-and-bottom-left-winder-staircase-with-balustrade.html?gclid=CjwKCA***BhADEiwA_pZwcIMdVRyWwSOxKkJChi***gtln***cID6Em***rtTONwpyh***QAvD...

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23 Dec

Conversion | Loft

Barnet - EN4

Enquiry from: Elitsa N

Start Date: Immediate

Staircase for loft on semi detached house house with fourteen steps and two left turns .

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13 Oct

Conversion | Loft

Waltham Cross - EN8

Enquiry from: Jacqui T

Start Date: Immediate

*homeowner Loft conversion including ensuite and stairs please call to appoint

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30 May

Conversion | Loft

St. Albans - AL2

Enquiry from: John D

Start Date: Immediate

i already have a converted loft room and am investigating a rear facing former to increase floor and height space. the staircase also needs to be less steep are you the property owner: owner of the pr...

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25 Apr

Conversion | Loft

Enfield - EN2

Enquiry from: Tony M

Start Date: Immediate

removal of butterfly roof, and chimney stacks. build up 1 x gable end flank wall and install new pitch roof with full rear dormer. create living space of 5600 x 4300 inc 5m2 shower room. install stair...

Post a similar request >

21 Apr

Conversion | Loft

Broxbourne - EN10

Enquiry from: Bev T

Start Date: Immediate

simple loft conversion with velux window are you the property owner: owner of the property property type: semi detached what are you looking to convert the space into: bedroom/s are you looking to hav...

Post a similar request >

07 Apr

Conversion | Loft

Borehamwood - WD6

Enquiry from: Dan B

Start Date: Immediate

indicative quote for hip to gable loft conversion of a 1930's semi detached house. anticpate installing master bedroom and en suite bathroom with bath. are you the property owner: owner of the propert...

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27 Mar

Conversion | Loft

Enfield - EN2

Enquiry from: Manoj R

Start Date: Immediate

Customer visited the myloftconversionprices.co.uk site and submitted an enquiry. Property type: Semi detached, Property owner: Relative of owner, Looking to convert into: Bedroom, Work description: ...

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12 Mar

Conversion | Loft

Waltham Abbey - EN9

Enquiry from: Filiz K

Start Date: Immediate

Loft conversion 2 meters height In Waltham abbey

Post a similar request >

05 Mar

Conversion | Loft

Broxbourne - EN10

Enquiry from: Adam A

Start Date: Immediate

loft conversion with dormer- ensuite shower and toilet are you the property owner: owner of the property property type: semi detached what are you looking to convert the space into: bedroom/s are you ...

Post a similar request >

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FAQs

how much is a loft conversion?

With the ability to add approximately one third of your existing living space ( by converting your old, unused attic) to your home or property without having to let go of your garden, it’s quite easy to see the reason why loft conversion has rapidly grown to become one of the most popular home improvements in the UK. However some homeowners usually shy away from the idea simply by looking at the perceived high cost of carrying out such a project, despite several researches showing that loft conversions offers the best rate of return on initial investment when compared to the other home improvement projects. So exactly how much would it cost to carry out this project?

Just like several other home improvement projects, the cost of a loft conversion varies greatly depending on a wide range of influencing factors. These factors include the size of your home, how old your home is as well as the quality of the fixtures and fittings you want to install. For instance, a high end bathtub alone can cost you thousands of pounds, meanwhile you can also construct a full bathroom suite on just a couple of hundred pounds. However, to give you an idea of the minimum cost of a loft project we’ll look at the most popular types and the minimum cost of each.

✓ Internal Loft Conversion - The most affordable type of loft conversion tends to start from £25,000 and above.

✓ Dormer or L-Shaped Dormer Loft Conversion. These are the most popular types of loft conversion. Dormer price tends to start from £35,000, while the L-shaped dormer starts from £45,000.

✓ Mansard Loft Conversion - This involves replacing the entire side of a sloping roof with a vertical wall and flat roof. It requires a planning permission. The type of loft conversion usually starts from £45,000.

✓ Hip To Gable Loft Conversion - This usually starts from £50,000.

how much value does a loft conversion add?

When its impossible to build out and create more space sideways, why can’t you look upwards? As more and more homeowners in the UK are carrying out their loft conversion project, one question that keeps popping up is the amount of value the loft conversion can add to their homes. However, this is a question that is impossible to provide a single and precise answer to. This is because the value that’ll be generated by a loft conversion is largely dependent on a wide range of influencing factors. To give you a vague idea of the loft conversion value to a property, we’ve put forward a research carried out by industry experts so you can know what you’re in for.

Nationwide carried out a research which shows clearly that a loft conversion including an additional bedroom as part of the building plan will increase a house’s value by up to 21 percent. Since the number of rooms a house has is one of the main metrics for house valuations, loft conversion comes in pretty handy as it’s a great and easy way to convert your house from a 4 bedroom house to a 5 bedroom house prior to sale.

Apart from the financial value aspect, loft conversion also adds more value to your lifestyle which is very unlike nearly other financial investments you can make. More space in your house automatically means more storage or a new room as you wish. A new room can be for a growing family or probably to serve as a guest room. It can also be used as a study space or even an office especially with the rapidly growing rate of people working from home. With loft conversion, the possibilities in terms of value are simply endless!

do you need planning permission for a loft conversion?

Typically, loft conversions do not require planning permission except in certain situations. They’re usually covered under what’s known as Permitted Development. Certain building works like loft conversion, rear extension and conservatories are granted planning permission by local authorities. Permitted Development, however, gives you a free range to improve your home without having any issues from the councils or regulations. Before your planned loft conversion can be covered under Permitted Development, there are some certain criteria that must be met. This criteria includes the following:

✓ The extension must not go beyond the existing slope of the roof at the front of the house.

✓ The loft space converted must not go beyond 40 cubic metres in a terraced house.

✓ The roof’s height must not be increased by the extension.

✓ The loft space converted must not reach beyond 50 cubic metres in a detached or semi detached house.

✓ The plan for the extension mustn’t involve structures like balconies, verandas or anything other structures of this nature.

✓ The roof extension should be positioned as far back as possible or at least 20cm from the existing eaves.

✓ The side that faces the window openings should be at least 1.7m beyond the floor and the windows should also be obscured.

✓ The roof extension must not overhang the existing roof or wall of the house.

✓ The materials that are to be used must be similar or the same to the materials that has already been used on the house’s exterior.

However, you should bear in mind that there are some properties that are exempt from Permitted Development. Examples of these type of properties include conservation areas, Areas Of Outstanding Natural Beauty and World Heritage sites. Permitted Development does not also provide coverage for listed buildings.

Will I need planning permission to convert my loft?

Planning permission is not normally needed for a loft conversion as they are covered by permitted development rights. A conversion company will tell you if you do and help you with this. For more information, see our article about planning permission.

Loft conversion

Other Top Projects in Knebworth

Customer Reviews

Overall rating:


Knebworth Loft conversion installers are rated 4.3 out of 5 based on 6 reviews of 68 pros.
The LeadsDoWork rating and review is an overall rating based on verified reviews and feedback from the customers with Loft conversion projects that have been connected with Loft conversion pros to help them. All Loft conversion contractors All Knebworth Loft conversion contractors
Adding a flat roofed dormer window to an existing loft conversion in New Malden Published: 16/12/2024 Adding a flat roofed dormer window to enhance an existing loft conversion in New Malden, KT3. Expert advice on installation, materials, and local factors to consider. Read this article
Skylight installation for a loft conversion bedroom in Banbury Published: 05/12/2024 Are you looking to install a skylight in your loft conversion? Learn about skylight installation on natural slate roofs in Banbury, including costs, materials, and tips for preparation. Read this article
Installing three dormer windows in loft conversion with sloping roofs in Grays Published: 03/12/2024 Professional installation of three small dormer windows with sloping roofs in a detached property loft conversion in Grays. Read this article

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