Greater London Enterprise Awards 2025/ 20 Best Residential & Commercial Building Contractor 2025 London boasts a diverse array of residential and commercial contractors, each working tirelessly to prove their prowess above the rest. When faced with such an expansive choice, selecting the right contractor for the project can be a daunting task. John Building Service is a shining light in the city’s construction industry, promising to deliver the highest quality finish and the greatest attention to detail in its services of building, extending, and renovating homes across London. We caught up with John Jitariu below, Founder and Managing Director of John Building Service, as the company is named in the Greater London Enterprise Awards 2025. John Building Service is a residential construction company offering a comprehensive suite of services that comprise everything from home extensions and loft conversions to full renovations. What first began as a small start up founded by John Jitariu has since grown into a solid and experienced team, equipped to take on projects of all sizes and scopes and eager to help clients turn paper plans into beautiful dream homes. Over the years, John Building Service has kept up with the times – introducing new materials, new systems, and adjusting in alignment with changing customer expectations. Throughout this time, however, the company’s core values have remained the same: to do a good job, to be honest, and to treat every house as if it were their own. These values guide the team across every project and have always formed the foundation of how John Building Service works. “I think what makes us stand out is that we actually care,” John told us. “A lot of companies say that, but we really mean it. We don’t overpromise or cut corners; we show up, we do what we say we are going to do, and we respect the homes we work in. Our reputation means everything, and we’ve built it by being reliable and consistent. Whether it’s a kitchen extension or a full renovation, the same level of care goes into every job.” This approach has been facilitated by John Building Service’s success in building a team of passionate individuals who take immense pride in their work. Projects may vary, but the team’s sense of responsibility and teamwork is present across all operations. While skill does matter, attitude is key. As well as being integral to internal operations, attitude can also play a significant role in determining external success; John Building Service works closely with homeowners, architects, and designers alike, so being easy to work with is just as important as possessing construction expertise – especially in London. “When you are dealing with designers, planners, and clients all at once, it is so important to communicate clearly and make sure that everyone walks away happy,” John explained. “London is a great place to work, because every project is different and clients have a wide range of needs and styles. It keeps us on our toes and makes the work interesting.” To thrive in such a dynamic landscape, John Building Service meticulously monitors the market for emerging trends and shifts, recently observing a rising interest in energy efficiency, with demand for better insulation, underfloor heating, and sustainable materials. What’s more, there has been a surge in individuals trying to make the most of their spaces – particularly within London, where room is limited. This has caused a higher demand for loft conversions, rear extensions, and full refurbishments. While these trends promise higher demand for John Building Service’s offerings, the market has simultaneously become more complex to navigate. Material costs have risen, supply delays have had significant impact on operations, and finding reliable tradespeople has become an almost impossible feat. In the face of such adversity, however, John Building Service has seized the opportunity to become more efficient – prioritising better planning, better communication, and stronger relationships with suppliers. John Building Service has emerged from every challenge stronger than ever, and 2025 promises to be no different. The company has an impressive pipeline of residential projects lined up – comprising extensions, lofts, and full refurbishments – that attest to its client’s continued trust, and its growing volume of word-of-mouth referrals. In the longer term, John aims to continue growing the business steadily and sustainably – establishing John Building Service as a company known for quality work and honest service. “We’re incredibly proud to have been awarded Best Residential and Commercial Building Contractor 2025,” he shared. “It’s great recognition for the work we have put in, and the trust our clients have shown us. We have always aimed to finish every project with everyone involved feeling proud of the result – and I think that is what people remember.” Contact: John Jitariu Company: John Building Service Ltd Web Address: www.jbsbuilding.co.uk
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