
Our services
Whatever your residential project, we deliver it.
From the first conversation to the final handover, CJE Build is the main contractor for high-specification residential projects across Hertfordshire and the Home Counties.
Whether you’re planning a ground-up new build, extending your family home, or transforming an existing layout, CJE Build acts as your main contractor throughout. You deal with one team, one point of accountability, and one uncompromising standard of finish.
We work across Hertfordshire and the surrounding Home Counties, on projects of all scales, from considered loft conversions to complex multi-phase new builds.

Full Design & Build Service
A truly end-to-end service for clients who want a single, trusted team to take their project from concept to completion.
As main contractor, CJE Build coordinates the entire supply chain, including architects, structural engineers, planning consultants, and specialist trades, so you don't have to. We manage the programme, control the quality, and keep you informed at every stage. There are no handoffs, no gaps in responsibility, and no surprises on the final account.
This is the most joined-up way to build, and it produces the best results. From the first site visit to the final snagging list, you have one team and one standard.
Ideal forNew builds, major extensions, and full house remodels where a single point of accountability matters most.
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Extensions
A well-designed extension should feel like it was always part of the house. At CJE Build, we deliver single and double-storey residential extensions that expand your living space without compromising the character of your home.
We manage the full process, from structural design coordination and planning approval through to construction and internal finishing. Our attention to detail means the join between old and new is seamless: matched materials, careful coursing, and a level of finish that reflects the quality of everything else we build.
We have extensive experience working in Hertfordshire's varied planning contexts, including conservation areas and the curtilage of listed buildings, where sensitivity and expertise are as important as technical ability.
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New Builds
Building a new home from the ground up is one of the most significant projects you'll ever undertake. CJE Build brings the experience, the team, and the discipline to deliver it to the standard it deserves, on time, on budget, and exactly as specified.
We work alongside your architect throughout, or can recommend trusted design partners to develop a scheme that meets your brief and secures planning consent. From foundation to ridge, we maintain rigorous quality control at every stage, because when you're building a bespoke home, a high-specification finish is non-negotiable.
We build new homes across Hertfordshire and the surrounding Home Counties. If you have a plot and a vision, we'd love to talk.
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Loft Conversions
The space is already there; it just needs the right team to unlock it. A CJE Build loft conversion is structurally sound, beautifully finished, and planned to extract maximum value from every square metre of your roof.
We manage the structural engineering, planning (permitted development or full application), building regulations sign-off, and all internal works from insulation to joinery. The result is a room (or rooms) that feel like a proper part of your home, not a bolted-on afterthought.
Types we build
- DormerThe most popular choice, maximising headroom and floor area.
- Hip-to-GableIdeal for detached and semi-detached properties.
- MansardLarger conversions with a near-vertical rear face.
- VeluxA cost-effective option where headroom already exists.

Internal Remodelling
Sometimes the most transformative thing you can do to a home is rethink what's already there. Internal remodelling (opening up a ground floor, reconfiguring a dated layout, or merging a series of small rooms into a single, light-filled space) is one of the highest-impact investments you can make.
CJE Build manages the structural and practical complexity of this work: removing load-bearing walls, relocating services, upgrading heating and electrical systems, and finishing to the same meticulous standard we bring to every project.
The result is a home that feels entirely new, without the cost or disruption of moving.
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