About KV Design & Build
An integrated design-and-build contractor for residential and commercial projects across London and Hertfordshire.
Designed and built properly.
KV Design & Build Ltd is a London and Hertfordshire design-and-build contractor delivering residential and commercial projects from concept through to handover. Our work spans home extensions, loft and basement conversions, full-property refurbishments, new residential builds, and commercial fit-outs for the hospitality, retail, and office sectors.
The design-and-build model is at the core of what we do. By managing both the design and the construction under a single contract, we give clients a level of coordination and accountability that the traditional model — separate architect, separate builder — cannot. There are no handover gaps, no conflicting specifications, and no ambiguity about who is responsible for the result.
We operate across the full breadth of London boroughs and the Hertfordshire commuter belt, with our base in the Welwyn Garden City and Hatfield area. Whether it is a rear extension on an Islington Victorian terrace, a hospitality fit-out in Camden, a loft conversion in Brookmans Park, or a new-build residential property in St Albans, we bring the same standards and the same integrated approach.
How we work
Initial consultation
We begin with a site visit and a conversation about your brief, your property, and your goals. No charges, no obligation — just a clear picture of what is possible and what a project with us involves.
Design and planning
Our design team develops the scheme to planning and building regulations standard. Where planning consent or pre-application discussions are needed, we manage that process. We handle structural calculations and coordinate specialist consultants.
Detailed specification and quotation
Before work starts, you receive a clear written specification and quotation. We scope the project thoroughly so you know what is included and what to expect. No hidden extras once the contract is agreed.
Build and coordination
Our construction teams and specialist subcontractors are coordinated through a single programme. We manage every trade on site, run regular client updates, and keep the project moving to programme.
Handover and snagging
We carry out a thorough snagging inspection before handover. Every item on the schedule is closed out before we sign off. The project is not complete until the standard is right.
Accreditations
KV Design & Build Ltd holds Safe Contractor accreditation, Gas Safe registration, and NICEIC approval — covering the core regulated disciplines within construction, gas, and electrical works. All projects are carried out by fully insured teams.
Safe Contractor
Safe Contractor accreditation demonstrates our commitment to health and safety standards across all site operations.
Gas Safe
Gas Safe registration means any gas works on your project are carried out by appropriately qualified and registered operatives.
NICEIC
NICEIC approval covers our electrical works, ensuring they meet the required safety and quality standards and can be properly certified.
Where we work
We work across London and Hertfordshire — from inner North London boroughs (Camden, Islington, Barnet, Hackney, Westminster, and beyond) through to the Hertfordshire commuter belt (Welwyn Garden City, Hatfield, St Albans, Potters Bar, Brookmans Park, and surrounding towns). Our base in the 01707 area gives us excellent road access across our whole operational area.
View all areas →Accredited & Registered
- Safe ContractorRecognised Safe Contractor accredited contractor
- Gas SafeGas Safe registered
- NICEICNICEIC approved electrical contractor
- Fully Insured
Get in touch
To discuss your project or arrange a free no-obligation site visit, call us on 01707 326879 or 07788 852093, or email info@kvdesignbuild.co.uk.