Homeowners
New homes, conversions and major refurbishments delivered turnkey by one team, like our timber-frame new build in Chorleywood.
Built properly, managed transparently.
JBP Developments is a construction company based in St Albans, delivering renovations, conversions and turnkey new builds across Hertfordshire, Bedfordshire and North London. From design and cost planning through to construction and completion, one team manages the entire project for property owners, investors and architects.
Our work covers turnkey new builds and design and build projects, renovations of period and listed buildings, and conversions and refurbishments, including HMOs.
Most of our projects involve an existing building that has to change a lot: new structure, extra floors, more bedrooms and bathrooms, or a heritage building brought back into use. One team handles the design, the cost and the build, so you deal with the people responsible for the work from the first drawings to handover.

A listed barn conversion at Beaumont Mews in St Albans, a 28-bedroom HMO conversion at Greencroft Gardens in West Hampstead and a turnkey timber-frame home in Chorleywood. Each case study covers the scope, the main challenges and how we delivered it.
Plenty of builders can put up a new home. Fewer are comfortable inside a listed barn or a townhouse that needs two more floors. That is where most of our work happens.
Our directors are construction managers by profession, so decisions on your project are made by people who understand the design, the cost and the build.
Underpinning and two extra floors at Greencroft Gardens. A listed barn rebuilt around its original frame at Beaumont Mews. Hidden structural defects at Maida Vale, turned into an extra bedroom and three bathrooms.
Design, cost and construction sit with one team, so nothing falls into the gap between the people who draw it and the people who build it.
Site reports, photos, costs and decisions are recorded as the work happens, and you get regular updates in plain English.
Homeowners, property investors and architects each need something different from a builder. Here is how we work with each of them.
New homes, conversions and major refurbishments delivered turnkey by one team, like our timber-frame new build in Chorleywood.
HMO conversions and refurbishments that add bedrooms and bathrooms, from a four-bedroom refurbishment in Tottenham to a 28-bedroom conversion in West Hampstead.

We join professional teams at pre-construction stage to test buildability, coordinate technical information and keep everyone informed through the build.
The questions homeowners, investors and architects most often ask us first.
Still shaping your brief? Read our guides to planning a construction project and what a turnkey construction service involves.
Our main services are HMO conversions and turnkey design and build. We also offer traditional construction for architect-led projects, project management, cost consultancy, technical management, and maintenance and aftercare.
We are based in St Albans and work across Hertfordshire, Bedfordshire and North London. Our HMO projects include West Hampstead, Maida Vale, Tottenham and Tooting.
As early as you can, so buildability, programme and cost can be reviewed before work reaches site. We can also join at tender or construction stage if the design is already developed.
Yes. JBP works with architects, structural engineers, services consultants and other professional teams through tendering, technical coordination and construction delivery.
You get a named contact, regular progress reports with photos, and early warning of any decision that could affect cost or programme.
A short description, the location, any drawings or photos, a rough budget and your timescale. If you don’t have everything yet, we can work out what’s missing on the first call.
Tell us what you’re planning. The first conversation is free.
Start a project enquiry →