Extensions, Loft Conversions & New Builds in Sevenoaks

Core Services

Most clients don’t want to manage a building project. They just want it done properly.

Building work shouldn’t feel unclear or pieced together.

We combine architectural thinking with practical construction, so projects are designed properly, priced realistically and built without gaps between design and site.

We’re a Sevenoaks builder delivering extensions, loft conversions and new builds across Sevenoaks and the surrounding areas.

The usual setup, architect, builder, separate consultants can work, but it often leaves gaps. Information gets passed around, decisions get delayed, and things get missed.

We keep it tighter than that.

At STAG / Sevenoaks, we can take a project from early concept right through to completion. That includes the architectural side, the planning stages, and the build itself.

It means the layout, structure and cost are all considered together from the start—not dealt with in isolation.

You’re not coordinating between different people. You’re dealing with one team that’s responsible for the outcome.

It doesn’t just make things easier—it reduces changes, keeps the programme moving, and gives you a clearer understanding of what you’re getting from the outset.

We build extensions across Sevenoaks, from simple rear additions to larger projects. Layouts, steelwork and levels are resolved early so the build runs without changes.

We take on a small number of new builds, planned before work begins. Structure and layout are set out early so the build follows a clear sequence.

We carry out full renovations, from layout changes to internal rebuilds. Work is planned and sequenced so the job keeps moving.

We carry out extensions, loft conversions and new builds across Sevenoaks, working with homeowners to improve layout, add space and deliver well-built, long-term solutions. From early design and planning through to construction and completion, projects are managed properly so everything runs as it should.

Drawings, planning and construction handled together, so the project is designed properly, priced clearly, and built without disconnect between design and site.

We manage everything as one process from the start, so what’s designed is actually what gets built.

What that means
Drawings and planning handled in-house
Build costs considered early
One team responsible throughout
The result

A more controlled build, fewer surprises, and a smoother project from start to finish.

This project involved opening up the rear of a house to create a single kitchen, dining and living space.

We started by resolving the layout and structure early. The rear wall was removed and replaced with structural steel to form a wide opening into the extension.

The extension was built with a flat roof and large sliding doors, bringing light across the full width of the space. Floor levels were set so the transition between old and new was seamless.

Because the design and build were handled together, key details—steel positions, roof build-up and drainage—were agreed before work started.

Once on site, the job followed a clear sequence. Structure first, then watertight, then internal works

Recent work

Loft conversion — Sevenoaks
Complete roof rebuild to form new bedroom and ensuite.

Rear extension — Westerham
Open-plan kitchen extension with structural alterations.

New build — Kent
Four-bedroom home from early design through to completion.

We’re based in Sevenoaks and regularly carry out projects in Westerham, Tonbridge, Orpington and surrounding areas.

If you’re planning an extension, loft conversion or new build, the best place to start is a proper conversation.

Call 07747 066 316 – email.com