As Principal Contractor, Knowles provides an all-encompassing construction service to clients and professional teams, taking a project from concept to completion and beyond. We thrive on the schemes that other contractors shy away from. Our commitment to in-house management on every project guarantees a consistent approach and the best experience for our clients.

The established reputation of our management and in-house teams has made Knowles a trusted partner for architects, quantity surveyors, professional teams and private clients. Our long-standing presence in London and the Home Counties means that we are expertly-versed in the complexities and challenges of working with councils and privately-owned estates, including The Royal Borough of Kensington and Chelsea and Westminster Council, as well as the prestigious Grosvenor and Cadogan estates.

We believe in considerate construction – in fact, it informs every decision we make.

Our in-house health and safety team ensures that our workforce put health and safety first, promote environmental awareness and communicate with the local communities in which we operate. That’s why Knowles is recognised by all the construction industry’s major trade bodies, including the ASUC and Considerate Constructors.

Alongside Knowles’ commitment to the health and safety of our staff, we are constantly looking forward and measuring our industries impact on the environment, which is why we are also committed to sustainable construction.

Every site, whether in London or the Home Counties adheres to our environmental manifesto. Knowles also makes monthly donations to climate action charity Ecologi where each month we donate 5 trees per employee at Knowles, which aims at reducing 4.5 tonnes of CO2.