King & Król London — luxury construction specialists for prime London homes

King & Król London is a bespoke construction and architectural development practice working across the most prestigious postcodes of North London, South West London and Hertfordshire — from Hampstead and Highgate to Kensington, Chelsea and Belgravia, and out towards the Hertfordshire borders. We exist for owners of exceptional homes who expect more than standard contracting — who want a single, accountable team that can carry a project from the first survey through to the final coat of paint, without the gaps, compromises and surprises that so often follow a renovation.

Our work spans three disciplines, all held to the same standard. We take on whole-house renovations and structural alterations for private clients, including basement and loft extensions and bespoke new build. We deliver extensions that add space and value to London homes. And we fit luxury interiors by hand, resolving joinery, stone, marble and light to the millimetre, with every junction decided on the drawing before a single piece is cut.

The practice is built for a particular kind of client. We work for private homeowners in prime London, and alongside the architects, interior designers and estate managers who look after those homes. Our clients value discretion, precision and a calm, accountable process: one dedicated project director, a settled team of trades, an open-book cost plan agreed before work begins, and a written report every week of the build. We survey properly, price openly, and build to last — and we stay on after handover, with warranties in place and a team that returns if anything needs attention.

Behind the work is an in-house team rather than a loose collection of subcontractors. Our architect and interior designer sit alongside our trades, so design, detail and finish are resolved under one roof rather than argued out on site. That is what lets us keep the quality, the programme and the budget under control on the kind of super-prime residence where the standards, and the stakes, are highest.

If you own or look after a property in North London, South West London or Hertfordshire and are considering a renovation, restoration or fit-out, we would be glad to talk it through — in person and without obligation. You can reach us through the contact page or the enquiry form on this site.