Domestic Improvements Cumbria and Lake District House Builders

DOMESTIC & RESIDENTIAL

William King transforms homes.

William King Construction has a wealth of experience building high quality extensions and renovations to suit every home. Whether you want to gain extra living space or add a garage to your property, we have the capability and experience to help you achieve your ambitions.

We oversee all aspects of the building process, work closely with contractors and architects to develop plans, establish timelines, and determine all costs. William King Construction ensures the project is completed on time and within budget.

From the initial consultation to the final finishing touches, we work closely with you every step of the way. Our collaborative approach ensures that your wishes are considered throughout the entire process.

A modern luxury Lounge extension in the Lake District national park

A carefully built dining room extension on a period property using locally sourced materials in keeping with the original structure.

A Brief History

William King Construction was founded in 2008 by William and Lisa King. Having worked across the UK for a wide range of developers and main contractors, William was driven by the belief that construction could be delivered with greater care, higher standards, and a more considered approach to quality.

From the outset, Lisa stepped away from a successful career in retail management to establish a strong operational and financial backbone for the business. This early focus on structure, systems, and accountability created a solid foundation that continues to underpin the company today.

The business initially focused on delivering high-quality residential projects, including a number of award-winning luxury homes across the North West of England. As the company’s reputation for quality, reliability, and technical competence grew, opportunities expanded into more complex and regulated environments.

Over time, William King Construction developed the capability to operate within large-scale, multi-disciplinary teams, delivering both residential projects and technically demanding civil and maintenance works. This progression naturally led to long-term involvement in the nuclear sector, where the company now supports high-standard, safety-critical environments requiring absolute precision, compliance, and consistency.

Today, William King Construction continues to balance bespoke, quality-led construction with specialist civil and nuclear-related works across Cumbria — maintaining the same principles of craftsmanship, integrity, and professionalism on which the business was founded.