Greenhithe & Dartford · Kent
Extensions, conversions, renovations and commercial fit-outs — delivered start to finish by one trusted team, from Orpington to Maidstone.
About JTC
Design, manage and build. Extensions, home renovations, loft conversions and everything in between.
JTC Construction Ltd is a building company based in Greenhithe and Dartford, Kent, run by Jon Tassi. We work on homes and commercial premises from Welling and Orpington out to Gillingham and Maidstone. From double-storey extensions in Gillingham to shop and warehouse fit-outs, we take projects from first sketch to final finish — so you deal with one team, not a dozen trades.
Services
Homes and businesses: whatever the size of the job, we handle it properly.
Single and double storey extensions that add real space and value.
Turn unused loft space into bedrooms, offices or en-suites.
Living rooms, utility rooms and shower rooms from your garage.
Complete new homes, built and managed from the ground up.
Supply and fit of kitchens, including extension-led open-plan spaces.
Modern bathrooms, shower rooms and en-suites, fully fitted.
Whole-home renovations and room-by-room updates.
Including Karndean and herringbone LVT, laid to a high finish.
Bespoke media walls with panelling, shelving and lighting.
Building and refurbishment work for offices, units and commercial premises.
Partitioning, offices, welfare areas and internal works for warehouses and industrial units.
Retail and shop fit-outs, from strip-out to finished, customer-ready space.
Our Work
A selection of jobs from across Kent. See full write-ups on our Projects page, or more on Instagram @jtcconstruction_uk.
Reviews
5.0 ★★★★★ from 19 Google reviews. Here are a few of them.
“My partner and I found JTC through word of mouth recommendations. Jon and his team are well regarded around our local area in Dartford. After seeking his advice, seeing examples of his work and discussing the single storey extension to the back of our house, we were more than confident to go with Jon and accepted his reasonable quote. His team are extremely professional, experienced and friendly. Each aspect of the build was completed timely and at the highest quality to meet Jon's perfectionist standard. Importantly we felt informed and included with every stage and the initial quote was almost spot on. We would highly recommend Jon and his team and will book him for any future projects without hesitation.”
“Jon and his team recently completed our single story kitchen extension. Jon kept us informed at every stage of the project, even when he wasn’t on site he would make sure to call and check we were happy with how the job was progressing. All team members turned up on time, were very polite, tidy and cleaned up really well at the end of each day. We highly recommend JTC Construction and we are using them for our next and future projects.”
“Our garage conversion turned out just wow. Jon and his team did an excellent job. He was always keeping us updated with the progress and involved us in every detail. We love our new summer house. These guys are the best, cannot recommend them enough. Once again, thank you for the fantastic job!”
“From start of project and throughout we had a great experience from Jon and his whole team at JTC. Excellent communication from Jon. All trades involved were polite and pleasant to work with. We are so happy to have been recommended to JTC. Will definitely use again on our kitchen and bathroom project. Very trustworthy bunch of lads. Thank you for our wonderful porch, we love it!”
“Jon and his team at JTC were fantastic throughout our project. They are all really knowledgeable in their areas and have been able to guide us with decision making. Jon has been really open and honest throughout in terms on budget and has worked with us to achieve our goals within a set budget. JTC converted the unused bottom floor of the house (previously 3 rooms) into an open plan living space and bathroom. The work has been finished to a very high level giving us a great base to to continue from to decorate. We are really happy with everything that has been done and will be recommending him to our relatives and friends who need works completing. Thanks Jon and team!”
“Great team at JTC and would def use again. We had a bathroom refurb and new doors hung throughout the house too. They turned it around in record time and were clean, tidy and kept us informed every step of the way. An Honest, trustworthy and hugely talented team. A*”
Areas We Cover
Based in Greenhithe and Dartford, we cover roughly a 20 km (12 mile) radius: from Welling and Orpington in the west to Gillingham and Maidstone in the east, and south to Sevenoaks.
Just outside the area? Call us on 07545 573833.
FAQ
We’re based in Greenhithe and Dartford and work across north and mid Kent and south-east London, roughly from Welling and Orpington out to Gillingham and Maidstone, including Gravesend, Sevenoaks, Swanley, Rochester and Chatham. If you’re just outside the area, get in touch and ask.
Domestic work including extensions, loft and garage conversions, new builds, kitchens, bathrooms, refurbishments and flooring, plus commercial building work, warehouse fit-outs and shop fit-outs.
Yes. Send us a few details about your project and we’ll get in touch to arrange a visit and a free, no-obligation quote.
It depends on the size and design of the extension, planning and building control requirements and the finishes you choose. We’ll give you a timeline for your project as part of your quote.
Yes. As well as homes, we carry out commercial building work, warehouse fit-outs and shop fit-outs. Contact us to discuss your project.
Request a Quote
Tell us a bit about the job and we’ll get back to you to arrange a visit and a free, no-obligation quote.
