As a premier design and build specialist serving Brentwood, BlackLeaf Build specialises in high-quality construction projects. From bespoke loft extensions to comprehensive property refurbishments, we provide a seamless and end-to-end service for local homeowners.
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If you are looking for a reliable building contractor in Brentwood, BlackLeaf Build is your premier local partner. We understand that any property development is a major financial commitment. This is true whether you are envisioning a high specification new home in the town centre or a bright and spacious extension located in the surrounding countryside. As your dedicated specialists, our team is committed to translating your initial concepts into a perfectly finished reality.
Our firm provides comprehensive design and build solutions that include loft conversions, home extensions, and premium new builds across Brentwood and the neighbouring areas such as Shenfield, Warley, Pilgrim’s Hatch, and Hutton. By managing every stage of the project from the first sketch to the final handover, we remove the complexity of coordinating with a separate architect.
Our professional expertise ensures that you receive exceptional craftsmanship and efficient project management regardless of the size of the job. If you are ready to discuss your next construction project, please contact the team at BlackLeaf Build today.
Skilled craftsmen and project managers with years of industry knowledge, deliverying exceptional results every time.
Every home is unique - we tailor your extension to match your lifestyle and vision, from concept to completion.
Using premium materials and meticulous attention to detail, we create extensions built to last.
Transparent communication and dedicated support ensure your project runs smoothly and exceeds expectations.
Our deep understanding of Essex planning rules and architectural styles guarantees a compliant, seamless build.
Industry-recognised certifications and memberships give you complete peace of mind.
At BlackLeaf Build, we are dedicated to raising the quality of residential properties through a diverse range of construction and refinement services. Our professional expertise encompasses everything from bespoke new developments to sophisticated home renovations throughout the Brentwood area. We apply a steadfast commitment to superior craftsmanship and meticulous quality control to every project we manage. Please explore our primary service offerings below to see how we can achieve exceptional results for your home.
We discuss your vision, assess feasibility, and guide you on design and materials.
We handle drawings, applications, and compliance for a smooth approval process.
Our builders work to plan and schedule, with a project manager ensuring quality and minimal disruption.
We complete final checks, walk you through your extension, and provide ongoing aftercare.

Single story rear and side flat roof extension, Leigh on Sea, Essex
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Rear single story extension, Westcliff on Sea, Essex
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Rear and side single story flat roof extension, Southend on Sea, Essex
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Rear ground floor and side first floor extension, Leigh on Sea, Essex
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Our firm is proudly established in the region and we maintain a steadfast commitment to the local community. We possess a deep understanding of the diverse property styles found throughout Brentwood, ranging from traditional heritage architecture to the specific technical requirements of modern luxury developments. This specialist insight allows us to select materials specifically for their durability and aesthetic appeal while navigating the local council planning process with total efficiency.
By choosing BlackLeaf Build, you gain a dedicated local partner with a reputation established through exceptional craftsmanship for your neighbours. We are truly invested in enhancing the long term value of properties across the entirety of Brentwood.
Our office in Leigh-on-Sea is the heart of BlackLeaf Build, where experience truly builds trust. From here, our dedicated team manages every stage of your project with care, precision, and professionalism. Conveniently located to serve homeowners across the county, our design and build office in Leigh-on-Sea ensures that we’re always close by to provide guidance, support, and expert craftsmanship tailored to your vision.
We take a meticulous approach to every stage of the construction process. From initial consultation to final handover, our in-house team and trusted subcontractors adhere to strict quality control measures, premium materials, and accredited building methods. Every project is overseen by an experienced project manager to ensure it meets both client expectations and current building regulations. For more information, contact the team at Blackleaf Build today.
Yes. Blackleaf Build is fully insured, holding both public liability and employer’s liability insurance for complete client protection. We also comply with all relevant health and safety legislation and work to the standards set out by local authorities and national building control bodies. For more information, contact the team at Blackleaf Build today.
Yes. Our team has extensive experience working with local planning departments in Brentwood and across Essex. We can guide you through every stage of planning permission, permitted development rights, and building regulations approval, ensuring all documentation is prepared and submitted correctly. For more information, contact the team at Blackleaf Build today.
In addition to Brentwood, Blackleaf Build serves clients throughout Essex, including Leigh-on-Sea, Southend, Shenfield, Chelmsford, Hadleigh, Thorpe-Bay and surrounding areas. Our team regularly works across both residential and rural locations, bringing our expertise to a variety of properties and architectural styles. For more information, contact the team at Blackleaf Build today.
Our approach combines traditional craftsmanship with a modern, design-led mindset. We prioritise communication, reliability, and precision-qualities that ensure each project reflects both the client’s vision and our commitment to excellence. We also offer a complete end-to-end service, removing the stress of coordinating multiple trades or suppliers. For more information, contact the team at Blackleaf Build today.
We cannot recommend Black Leaf Build enough, the eye for detail and the quality of finish on our extension project in Leigh on Sea in second to none. We have now used Matt and his team on various projects, from installations of bespoke doors, to our garage conversion and refurbishment. – Mary Haver – Essex
EXCELLENT Based on 5 reviews Posted on Tristan CoxTrustindex verifies that the original source of the review is Google. Massive thanks to Matt and Colin at Blackleaf Build for the loft conversion. They’ve done an incredible job and the extra space has transformed the house. They’re great guys to work with, really professional and the finish is top tier. I’m already planning the next bit of work for them to do. If you need a proper build team, these are the ones.Posted on jonathan wallsTrustindex verifies that the original source of the review is Google. Matt & his team were fantastic. We had an issue with a previous builder leaving us with many trouble points but Blackleaf came in and sorted each and every point that was at fault and proceeded to help us with all aspects of the build. Couldn’t be happier with his work and would happily recommend him to anyone thinking of having a build project. Thank you guys really appreciate everything you do for us. CheersPosted on Lorain McDonaldTrustindex verifies that the original source of the review is Google. The Blackleaf team were a joy to work with, especially Bob. My bungalow refurbishment was completed on time and the team kept me informed every step of the way. I would not hesitate to recommend Blackleaf and will definitely use them for future projects.
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