Oneoff Design projects
Our Work

Built to last. Designed to impress.

Every project is a collaboration — your vision, our expertise, one clear process from first sketch to final sign-off.

Rear Extension
Extensions2025

Rear Extension

Hackney, London

A full-width rear extension transforming a Victorian terrace into a light-filled open-plan kitchen and living space. Structural steel frame, polished concrete floor, full-height glazing.

New Build Residence
New Builds2025

New Build Residence

Guildford, Surrey

A four-bedroom detached new build on a tight infill plot. Designed to maximise natural light and garden aspect while meeting strict planning constraints.

Contemporary Interior
Extensions2024

Contemporary Interior

Sevenoaks, Kent

A side-return and rear extension combined with a full interior redesign. Structural alterations, new staircase, and bespoke joinery throughout.

Side Return Kitchen
Extensions2024

Side Return Kitchen

Islington, London

A side-return extension with a glazed roof lantern, creating a dramatic kitchen-diner that connects seamlessly to the rear garden.

Loft Conversion
Loft Conversions2024

Loft Conversion

Brighton, East Sussex

A full dormer loft conversion adding a master bedroom suite with en-suite and dressing room. Velux rooflights to the rear for maximum light.

Detached New Build
New Builds2023

Detached New Build

Esher, Surrey

A five-bedroom detached house on a greenfield site. Designed with sustainability at its core — air source heat pump, solar PV, and high-performance insulation.

Open Plan Living
Extensions2023

Open Plan Living

Richmond, London

Removal of load-bearing walls and a rear extension to create a sweeping open-plan ground floor with bi-fold doors opening to a landscaped garden.

3D Visualisation Suite
3D Visualisation2023

3D Visualisation Suite

Weybridge, Surrey

A full photorealistic 3D visualisation package for a planning application — exterior renders, interior walkthroughs, and material studies.

Interior Visualisation
3D Visualisation2024

Interior Visualisation

Cambridge, Cambridgeshire

Detailed interior 3D renders produced ahead of a planning submission — helping the client and committee visualise the finished living spaces before a single brick was laid.

50+Projects Completed
100%Planning Success Rate
8Disciplines In-House
25+Years Experience
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OneOFF Design provides residential design and project management services in Cambridge and Cambridgeshire, including house extensions, renovations, new builds, planning applications, CAD drawings, 3D visualisation, Building Regulations and construction project management.