JNA Developments London Ltd


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

   Open today 08:00 - 17:00

Why Choose Us?

Well Established
Extensive Knowledge
Professional Service

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)


Garage Conversion

JNA carried out a garage conversion for me, turning the space into a downstairs room accessible from the hall, that has become an office. I’m very happy with the work completed, which was to a very high standard. The Team were friendly, professional and completed all works as agreed. I plan to use JNA again in the near future for some additional extension work.
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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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