J.Berry Extensions & Conversions
House extension in Bishop's Stortford by J Berry Construction

House extensions · Bishop's Stortford

House Extensions in Bishop's Stortford

We are a local building firm, based just three miles away in Sawbridgeworth, and Bishop's Stortford is very much our home patch. We design and build house extensions across the town and its villages, from a rear extension on a period home near the centre to a larger project on one of the newer estates, and we run the whole job as one team, from the first visit through design, planning and building regulations to the finished room.

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Full-width rear extension with bifold doors

Essex

Rear extension

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Itemised before work starts

The price we quote

is the price you pay

Director-led

Every project overseen by Jason Berry

On schedule

Agreed timeline, kept

House extensions in Bishop's Stortford

This is a town people work hard to stay in, an old malting town on the Stort with fast trains to London and good schools. So the work here is usually about making a home you love bigger and better rather than moving away from it.

Thinking about extending your Bishop's Stortford home?

Book a free, no-obligation site visit and we will talk through what will actually work on your house and what it will cost. Call 07920 731533.

House extension in Bishop's Stortford by J Berry Construction

Why homeowners choose us

Why homeowners here choose us

You are inviting a team into your home for months, and being genuinely local counts for a lot. We are on your doorstep, not the far end of a long drive, and a good deal of our work in the town has come through recommendation. You deal with one team throughout, run by the company director. We handle the planning and building regulations, which in Bishop's Stortford means knowing the conservation rules that trip a lot of people up. Our quotes are itemised, not a lump sum.

Matched to your home

The extensions we build around Bishop's Stortford

  • The town runs from timber-framed and Georgian buildings around Windhill and the old centre to Victorian and Edwardian homes and large modern developments on the edges. Different homes, different moves.
  • Rear extensions opening the back of the house to the garden.
  • Side return and wrap-around extensions on the older homes.
  • Double storey extensions for bedrooms and living space together.
  • Kitchen extensions with sliding or bifold doors and a roof lantern.
  • Sympathetic work to period and listed homes in and around the conservation area.
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Rear extension suited to homes in Bishop's Stortford

Planning & regulations

Planning permission in Bishop's Stortford

Here is the local detail that catches people out, and it is worth knowing before you plan anything.

Your planning authority is East Hertfordshire District Council. The town-centre conservation area is covered by an Article 4 direction, confirmed in 2017, which removes a number of the permitted development rights you would normally have. In practice that means around 1,500 households need planning permission for things that are automatic elsewhere, including some window and door changes, roof coverings and street-facing alterations. Most work that is not visible from the street, and genuine like-for-like repairs, are generally not affected, but it pays to check. Listed buildings, of which the old town has many, need separate consent.

Out on the newer estates it is a different story, and many extensions there still fall under permitted development. Knowing which regime your home sits under is exactly where we start, so you do not design something that was never going to be allowed. One note for the future: East Herts is due to be replaced by a new unitary council around 2028, though the rules will carry over. We check where your property stands and manage any application for you.

The ground around Bishop's Stortford

The ground here is boulder clay over London Clay, the stiff glacial clay that blankets this part of the Hertfordshire and Essex border, with the River Stort valley cutting through the town. Boulder clay is generally firm but variable, and the London Clay beneath swells and shrinks with the seasons, moving most near mature trees. Closer to the Stort the ground can be softer and wetter, with a higher water table.

On a plot near a large tree, or down towards the river, foundations often need more depth and thought than people expect. We would rather design for that from the start than meet it as a surprise, so on trickier plots we get the ground checked before pricing the groundworks.

Cost, in the open

What an extension costs in Bishop's Stortford

Cost comes down to size, specification, structural work and finish, and heritage work in the conservation area can add to it.

As a general guide, single-storey extensions commonly run at a few thousand pounds per square metre of finished space, with double storey often better value per square metre. Those are ballpark figures, not a quote. Use our cost calculator for an early estimate, and book a free site visit for a real, itemised figure.

Want a real figure for your project? Book a free site visit and we will price the actual work, with a clear itemised quote and no pressure to proceed. Call 07920 731533 · Get a free quote

Want a real figure for your project?

Book a free site visit and we will price the actual work, with a clear itemised quote and no pressure to proceed.

How it works

What the build actually looks like

Once we are on site, a single-storey extension usually runs roughly like this, allowing for size, weather and ground: Weeks 1 to 2: setting up, then groundworks and foundations. Weeks 3 to 4: brickwork to damp-proof course, drainage and the slab. Weeks 4 to 6: walls up, structural steel in, roof on and watertight. Weeks 6 to 8: windows and doors, first-fix electrics and plumbing. Weeks 8 to 10: plastering, second fix and the kitchen fit-out. Final week: decorating, flooring and snagging before we hand over. Recent work in Bishop's Stortford [Real project slot. This is a town we know well and have worked in, so a completed local project with two or three photos and a line on the brief will make this page genuinely strong. Send one and it goes here.] [Testimonial slot. You already have a real review from a Bishop's Stortford client, so drop it in here with a first name and area.]

What homeowners say

Trusted by homeowners across Hertfordshire

“From the moment he arrived he had a real professionalism and vision for what we could achieve. Jason was trustworthy and honest which made the whole build a pleasure.”

Kim and Tony, Ongar

Full house extension

Director-led

Common questions

House extension questions in Bishop's Stortford, answered straight

The questions every Bishop's Stortford homeowner asks at the first site visit.

Anything else? Call 07920 731533 and you’ll speak to Jason Berry, not a call centre.

It depends where your home is. In the town-centre conservation area, an Article 4 direction means more work needs permission than usual, including some window, door and street-facing changes. On the newer estates, many extensions fall under permitted development. We check your exact address with East Herts District Council and handle any application.

If your property is in the conservation area, some changes that would normally be automatic now need planning permission, mainly ones visible from the street. Work hidden from public view and genuine like-for-like repairs are usually unaffected. We will tell you exactly how it applies to your house.

Call us on 07920 731533 or send the enquiry form. We arrange a free, no-obligation site visit, then give you a clear, itemised written quote for the actual project.

Yes. The visit and the quote cost nothing, and there is no pressure to proceed.

Bishop's Stortford sits on boulder clay over London Clay, which moves with the seasons and near trees, and the ground softens towards the Stort valley. That often means deeper or specially designed foundations, so we check the ground before starting.

Bishop's Stortford itself, along with Sawbridgeworth, Stansted, Much Hadham, Thorley and the surrounding villages, and we are based right nearby. Call us to confirm your postcode.

Start your extension

Thinking about extending your Bishop's Stortford home?

Book a free, no-obligation site visit and we will talk through what will actually work on your house and what it will cost. Call 07920 731533.

07920 731533