Hollington & Sons (builders) Limited

Established in 1997, Olli Group is a family-run contractor with over 28 years of experience, known for quality, integrity, and client satisfaction. We serve a diverse client base across public and private sectors throughout London and the UK.

Our core expertise is predictive and reactive maintenance, delivered alongside a full range of construction services including refurbishments, retrofit, property management, and new build projects. We support clients across Education, Retail, Leisure, Social Housing, and Property Management sectors.

With our Head Office in central London and a Docklands depot providing excellent transport links, we deliver responsive and efficient services across the capital and surrounding regions.

Our experienced team brings professionalism and a proactive “can-do” approach to every project, navigating complex operational and environmental challenges while maintaining the highest ethical standards. We focus on understanding client needs, building long-term partnerships, and consistently delivering reliable results.

We are committed to staff development, with leadership working closely with teams to support growth and maintain a highly motivated workforce.

Health and safety underpins everything we do, ensuring projects are delivered safely, on time, and within budget while protecting our people, clients, and communities.

Olli Group holds a wide range of industry accreditations including CHAS, Constructionline Gold, SafeContractor, FIRAS, BM TRADA (ISO 9001, 14001, 45001), BWF, ASFP, Fire Door Alliance, and the Fire Protection Association. Our in-house joinery and fabrication teams provide bespoke joinery and certified passive fire solutions, ensuring full quality control from design through to completion.

Driven by integrity, care, and a commitment to excellence, Olli Group continues to grow as a trusted partner within the built environment.

Frameworks

• DPS for Minor Works and Services