A Principal Contractor You Can
Confidently Recommend
When your client asks who should build your design, the answer affects your reputation as much as theirs. RCB Design & Build delivers complex residential and light-commercial projects across London with a rigour that reflects well on everyone involved.
FMB member. TrustMark verified. 9.96/10 on Checkatrade. Full CDM Principal Contractor capability. Documentation you can stand behind at sign-off.
Why Architects Work With Us
We understand what matters to a design professional — and it isn't just getting the job done. It's protecting your client relationship, your design, and your professional reputation.
We protect your design intent
We've worked with architectural drawings long enough to know when a substitution or shortcut undermines what the design is trying to achieve. We raise it before we do it — not after.
Your client is in good hands
Clients referred by their architect expect a higher standard. Our 9.96/10 Checkatrade rating and 114+ verified reviews are evidence that we deliver. We communicate clearly, hit programmes, and don't leave clients chasing updates.
No CDM headaches
We take on the Principal Contractor duties under CDM 2015 — health and safety plan, site management, F10 notification where required, and completion of the health and safety file. Your scope as Principal Designer is clearly defined and we work within it.
Documentation that holds up
Our paper trail is thorough: signed contracts, variation orders, Building Control inspection records, warranty documentation. At point of sale or remortgage your client won't find missing certificates.
How We Work With Your Practice
From tender through to handover — a clear process, clearly communicated.
Tender & pre-construction
We price from your drawings — stage by stage, trade by trade. You get an itemised estimate that you can share with your client transparently. We flag any buildability concerns or design clashes early, before they become on-site problems.
Design development support
We're experienced in working with designs that are still evolving. Where clients come to us with planning drawings but not full technical packages, we coordinate with your practice and the structural engineer to develop the information needed to price and build accurately.
Compliance & approvals
We manage Building Control submissions, inspection scheduling, and the CDM file. We work with your appointed structural engineer, coordinate party wall matters with the surveyor, and keep a full documentation trail — which protects your client and your practice.
On-site delivery
Your design is executed by a coordinated team — not a loose collection of trades. We manage sequencing, subcontractors, materials, and quality control. Our site manager keeps a photo and progress log; you can access updates without visiting site every week.
Handover
We issue a full handover pack — Building Control completion certificate, warranties, as-built notes for any variations, and a snagging sign-off. Your client gets the documentation they need for future sale, remortgage, or insurance.
Projects We Deliver
We cover the full range of residential and light-commercial works that architectural practices typically refer.
"RCB handled a complex rear extension and loft conversion for one of our clients. They were organised, communicated well with the client throughout, and flagged issues early rather than springing surprises at the end. The finish matched the spec and Building Control signed off first time."
What Architects Say About Working With RCB
Verified by Checkatrade, TrustMark, and FMB — 9.96 average from 114+ reviews.
"Vasi and the team delivered exactly what was promised. We now have a stunning master bedroom with en-suite and a separate study in the loft. Finished on time and within budget."
James T.
Lewisham, SE13 · L-Shaped Dormer Loft Conversion
"RCB managed everything from planning drawings through to the final coat of paint. Professional throughout, always on time, site kept clean every day. Would not hesitate to recommend."
Sarah M.
Islington, N1 · Rear Extension + Kitchen
"The wraparound extension has transformed how we use the house. RCB managed every trade, coordinated the steel installation, and the bifold doors are perfect. Professional from start to finish."
David W.
Hackney, E8 · Wraparound Extension
Start a Referral Conversation
If you have a project in design that needs a delivery partner, or a client asking for contractor recommendations, we're happy to discuss scope, programme, and budget in confidence.
Contact Vasi directly at contact@rcbgroup.co.uk or call 07359 872594.