4Mark - Renovation Specialists
4Mark renovate spaces to last a lifetime. Our aim is to make your vision a reality whilst ensuring minimal disruption and quality execution. For over 25 years we have focused on uplifting existing spaces, conversions and extensions - giving you more space, light and comfort for a happier healthy life. Our Portfolio. "They provide a refreshingly different approach to building work in London, which must be applauded"— Alan J Peach. Our Services, at your Service. As a service leader and household name in West London, we focus on providing excellence to our clients through construction and collaboration with trusted partners. Renovate. Raise your game with an extension to your kitchen, basement, or loft. Our team can work with even the most challenging of spaces, turning them into environments to work, play, and host in - all whilst ensuring it compliments your existing spaces. Convert. Reimagine your space without needing to apply for planning permission. You can achieve maximum transformation with minimal disruption - your imagination need not be restricted. Extend. Whether you are looking to extend your basement or loft, we can develop even the most challenging of spaces into environments to work, play and host in. Our Services. “Owing to the high standard of work and the good relationship throughout, we wouldn't hesitate to recommend 4Mark to anyone”— Gemma Hennessy. Our Process. We Consult. To guide you through the planning permission process, we consult with District Surveyors and Local Authorities to provide a seamless and stress free experience. We Partner. Working with industry-leading architects and interior designers, we are able to turn your home into a creative space-saving environment to represent a unique extension of the self. We Build. We operate an in-house construction team, all trained to deliver a standards of long-lasting excellence. Contact Us. Bespoke, quality, craftsmanship. We don't just make your vision a reality, we shape a home.
Raise your game with an extension to your kitchen, basement, or loft. Our team can work with even the most challenging of spaces, turning them into environments to work, play, and host in - all whilst ensuring it compliments your existing spaces.
Reimagine your space without needing to apply for planning permission. You can achieve maximum transformation with minimal disruption - your imagination need not be restricted.
Whether you are looking to extend your basement or loft, we can develop even the most challenging of spaces into environments to work, play and host in.
External Building Works
Internal Building Works
Refurbishment
Maintenance
Painting & Decorating
Landscaping
Plumbing
Heating
Electrical
Structural
Damp Profing
Joinery & Carpentry
- Fully Accredited and Insured
- Durable & Long-Lasting Remodeling
We prioritize sustainability by offering eco-friendly materials and building practices, minimizing environmental impact.
- Customer Satisfaction Guaranteed
Your peace of mind is our top priority. We strive to exceed your expectations with clear communication and meticulous attention to detail.
- Free Consultations & Detailed Estimates
We offer affordable remodeling solutions without compromising on quality or craftsmanship, making your dream renovation a reality.
“Working with 4Mark was a hugely positive experience, We found the whole team to be kind, smart, careful and considerate. Communication was always straightforward and the foreman (on site) always kept us up to speed with what to expect and what was happening. We have recommended 4Mark to countless friends in Chiswick since they finished our home in 2023. I would be happy to show anyone around our home or talk on the phone to provide a more detailed reference.”
“We used 4 Mark Construction to build our extension and reconfigure the ground floor. 4 Mark was incredibly professional. Any additional work we asked for was costed and agreed in advance and Mark was scrupulously fair in deducting things from the quote we subsequently decided not to have. The people working for him are excellent and their work is of the highest quality. We have already recommend 4 Mark to friends and would have no hesitation in recommending them to anyone.”
“Both my wife and I, both of whom have experience in the commercial property market were delighted with the management and delivery of the project and in particular the reliability, punctuality and general good nature of each and every one of the traders that 4mark employ directly.”
“4 Mark recently carried out a complete renovation of our house in Little Venice, which included structural works. The work was approached in an organised fashion and any issues that we raised were quickly addressed and received with good humour! We also valued the relationship that Mark developed with our architect during the project. My Partner and I lived at the property during the work which involved replacing three bathrooms and building work on every floor. We were very impressed with the builder's consideration and the house was left in as orderly a state as possible every day.”
“I am a small developer specialising in the extension and refurbishment of high value houses in Chiswick. With exacting standards and a reputation for quality, it is essential that I employ a building company that is competent in all aspects of building. They must also be reliable, trustworthy, and able to complete a project on budget and on time. 4mark Construction Limited has now completed four major projects for me, each bigger than the last, and, in the main, has met those requirements. I enjoy working with Mark Monagle whose other qualities in”
