JNA Developments London Ltd


22 Oatlands Rd, Burgh Heath, Tadworth, KT20 6BS Directions

Tel 01737 212063
   Now closed Open today 08:00 - 17:00

Why Choose Us?

Well Established
Extensive Knowledge
Professional Service

Here at JNA Developments London Ltd, we pride ourselves on our reputation

years of experience





Business overview

***Surrey's Number 1 Loft Conversion and Extension Specialist***

Since I started my company I have tried to maintain a fresh approach to building. I liaise with the customer throughout the whole project to create exactly what the customer wants, whilst suggesting some of my own ideas.

We pride ourselves in customer care & you will see from my feedback that my customers are always happy with the projects completed. We also maintain a level of high quality workmanship at all times and always execute every job with professionalism.

My company specialise in loft conversions/extensions & major structural work but also take on garage conversions, kitchens, bathroom, central heating systems, house electrics, floor/wall tiling, shop fitting & house refurbishments.

I have 20 years of experience in the building trade & all of my employees are qualified tradesmen.

All my work carries a guarantee and is covered by £2 million Liability Insurance.


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Products & Services

Building Renovations

Building Conversions

Building Refurbishments


Barn Conversions


Commercial Builders


Fascias and Soffits

Garage Conversions

House Extensions

House Builders

Home Improvements


Mezzanine Floors


Property Maintenance


Wall Rendering


Truss roofing

Cut roofing




Hardwood flooring

GRP roofing


Patio Laying



Self Build Homes

Loft Conversions

Out house/Man cave

Dormer Roofs

Atrium/Sky Light Fittings

Bi-Folding Door Fitters



  • Construction, Level 2 IVQ Technician Certificate (City and Guilds of London Institute)


JNA Developments - Kitchen extension

Lovely job so far by Justin and his team on our kitchen extension. The quality of their work has been fantastic and they have been great to deal with all the way through the project. I would not hesitate to recommend them.
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JNA - reliable, honest and tidy - a rare breed of builder

JNA have been great throughout the entire job, (9 months). They must be the tidiest and most polite builders we have ever encountered. I cannot fault their attention to detail and quality of workmanship.

The original decision to go with JNA wasn't based purely on price alone, as their quote was not the cheapest of those we obtained; but also on gut feeling, which proved to be the right call as our experience throughout the works has been fantastic with Justin and his team being almost as detailed, (read OCD), as I am!

We thoroughly recommend JNA for any projects you may considering and I will certainly call on them for the next project.
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Stunning loft conversion

Justin and his team could not have been more professional, efficient and easy to work with. It was a pleasure having them working in our house. Nothing was too much trouble and they exceeded expectations. The schedule was on time at every stage. The results look fantastic - we are so happy with our new loft conversion. We would not hesitate to recommend them to anyone.
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Loft conversion going great so far.

This is a half way review. The works carried out so far have been from the outside. Timekeeping has been excellent and we are on schedule. Justin communicates with us at every step of the way. The builders are polite, courteous and tidy. The team are extremely hard working. We are really pleased with the work so far.
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Excellent experience with JNA Developments

We've had an excellent experience with JNA developments. We were initially recommended their services, and would now very much recommend them to friends & family. They completed our hip to gable / 2 bedroms and one bathroom loft in 10 weeks. The experience has been absolutely stress-free, as the trades seemed to follow each other seamlessly, and progress was seen on-site each day (and the whole house was left tidy and clean at night). We had a clear idea of what we wanted, but Justin and his team made some very valuable suggestions throughout the project. We were particularly impressed with the quality of the finish everywhere, i.e. the fibreglass roof which was an upgrade on what we thought we were getting. Everything was also kept on budget with no bad surprises on completion.
The team was very polite and friendly, which made it a pleasure to have them around every day, and eased the communication and project management.
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Loft conversion.

“Outstanding job done! We can't recommend Justin and his team enough. We were very impressed with the attention to detail and workmanship. Kept us up to date with the build and each stage as they went along. Justin has an excellent team and they share the same high work ethic. They were always polite, considerate and very tidy, and always conscious of it being our home.”

- Source: Customer in Epsom

Garage rebuild and first floor extension.

“Justin and his team have now finished this project and we couldn't be happier with the end result. It's such a lovely space and everything feels so well finished throughout. The whole team were a pleasure to deal with, we almost miss having them here! We would certainly use JNA Developments for any future projects. A really excellent company, highly recommended.”

- Source: customer in surbiton

Piggy back loft extension.

“This is the 3rd large project JNA Developments have done for me and I remain 100% satisfied with the results. The team of all British tradesmen were polite, respectful and hard working. My loft was completed on time, within budget and took half the time it has taken other local firms around to do the same extensions!! Nothing was too much trouble.”

- Source: customer in kingston upon thames