A dedicated white-label General Contractor. From 200+ vetted specialist craftsmen to site management and regulatory approvals, we handle the execution so you stay focused on the design.
"The designer owns the vision.
We own the execution."
Most interior designers are exceptional at space planning, material selection, interior architecture, aesthetic direction, and client relationships. But as projects grow in scale and value, designers find their creative time swallowed by site chaos.
You should not have to spend your days managing plumbers, resolving HVAC routing clashes, chasing 15 disparate trades, negotiating with building control, or dealing with site safety documentation.
Harris & Williams operates as your dedicated, white-label General Contractor. You provide the drawings and creative intent. We manage the construction process from initial technical review to flawless handover.
We bridge the gap between creative vision and site reality. You retain total design sovereignty while we operate as your specialized construction department.
High-end interior architecture requires master craftsmen: bespoke joiners, stone setters, specialist metalworkers, and precision MEP engineers. You never need to source, interview, or coordinate these trades. One accountable team handles them all.
One relationship · One contract · 200+ specialist trades
You shouldn't spend your days refereeing subcontractors or answering frantic calls from site. You work exclusively with a dedicated Project Director who protects your drawing intent, manages schedules, and ensures micro-millimetre standards.
Planning permissions, building control, listed building consents, party wall agreements, and site safety documentation. We manage the statutory complexity behind the scenes, giving you a clean communication layer and complete peace of mind.
Building Regulations · Listed Consents · Great Estates · Safety Compliance
A meticulously executed restoration of a 5-storey Georgian townhouse on Cheyne Walk. Harris & Williams acted as white-label contractor to conceal complete modern climate control and structural floor levelling while preserving 18th-century plaster cornices.
A turnkey duplex penthouse overlooking Mount Street Gardens. High-density coordination involving Westminster crane road closures, crane lift of 4.5m bronze stair stringers, and a comprehensive white-glove site delivery.
A complete internal rebuild behind a grand classical Belgravia facade. Harris & Williams executed the deep basement formation, sub-surface waterproofing, swimming pool plant room, and all high-precision interior finishes.
A sweeping country estate restoration marrying a 17th-century Jacobean manor with an ultra-contemporary structural glass pavilion. Completely off-grid sustainable energy integration concealed within historic outbuildings.
Working with Harris & Williams gave our studio the freedom to specify uncompromising bespoke details without fielding frantic calls from trades. They understood our drawing packages down to the half-millimetre and protected our design intent completely.
Eleanor Vane
Creative Director · Studio Vane Interiors
Grade II Listed Chelsea Townhouse (6,450 sq ft)
Harris & Williams is the only contractor we have encountered who treats our drawings as sacred documents rather than negotiable suggestions. A true white-label execution partner. Our client only ever experienced a united, polished team.
Marcus Saint-Honoré
Founding Principal · Atelier Saint-Honoré
Mount Street Duplex Penthouse
In country estates, the operational complexity—from ground-source heat pumps to stone restoration—can easily overwhelm a design team. Julian and Oliver managed 24 separate specialist trade packages with calm architectural precision.
Julian Kellingford
Design Director · Kellingford Studio
17th-Century Jacobean Manor & Pavilion
Send us your architectural drawings, tender schedules, or concept briefs. Our directors will review your scope with complete discretion.