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Conversions

Barn and building conversions in Hertfordshire

We convert barns, period houses and other existing buildings into new homes and accommodation across Hertfordshire, Bedfordshire and North London, including listed buildings.

What we do

Conversions that keep a building’s character

Converting a building means giving it a new use without losing what makes it worth keeping. That usually involves structural repair, new foundations or floors, and careful work around original features.

Our conversions range from curtilage-listed barns turned into holiday apartments to London townhouses converted into HMOs (see our HMO conversions page). We can build to your architect’s design or deliver the project as design and build.

01

Feasibility and consents

We look at the building, what it could become and the consents it is likely to need, such as planning permission, change of use or listed building consent.

02

Structure and foundations

Repairs to the existing frame, new foundations and new floors. At Beaumont Mews, difficult ground needed a floating reinforced-concrete slab and deep strip foundations.

03

Heritage detail

Original features repaired and kept, from timber A-frames and flint walls to brick floors and decorative ceilings.

04

Services and finishes

Heating, drainage and services designed into the new layout, with finishes that suit the building.

Conversions often need planning permission, change of use or listed building consent. Your architect or planning consultant leads on those, and we build to the approved design.

Our process

How a conversion runs with JBP

From the first look at the building to handing over its new use.

Share the building

Send the address, photos, any drawings and what you want it to become.

Survey and feasibility

We look at the structure, the ground and what has to be kept.

Agree the scope

We set out the work, the programme, the price and who does what.

Convert and hand over

We manage the conversion through to completion and handover.

Completed work

Conversion case studies

From listed barns in St Albans to London townhouses.

St Albans, Hertfordshire

Beaumont Mews

Curtilage-listed barns converted into seven holiday-let apartments, keeping the A-frames, flint walls and brick floors. £1.3m, 46 weeks.

Read the case study →

Tooting, south London

Tooting

A three-storey townhouse converted and extended, with new drainage, utilities and structure. £1.2m, 28 weeks.

Read the case study →

Before you start

Conversion FAQs

Have a building in mind? Talk to the JBP team.

Can you convert a listed building?

Yes. Beaumont Mews was a conversion of curtilage-listed barns into seven apartments. We kept the original A-frames, flint walls and brick floors and built new foundations around them.

Do you handle planning and change of use?

Your architect or planning consultant normally leads on planning permission, change of use and listed building consent. We can advise on buildability and cost while the application is prepared, then build to the approved design.

How is a conversion different from a new build?

The existing building sets the rules. Its structure, ground conditions and the features worth keeping are often only fully known once work starts, so we plan for that from the beginning.

Where do you work?

We are based in St Albans and work across Hertfordshire, Bedfordshire and North London.

Have a building to convert?

Send us the address, a few photos and any drawings, and we’ll call you back to talk through what the building could become.

Start a project enquiry
Call 07782 338715Start an enquiry

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