DPMNI (Diamond Property Maintenance NI) is a Belfast-based property maintenance, facilities management and building services company delivering professional solutions to commercial, public sector, industrial and residential clients across Northern Ireland.

With more than 30 years of combined industry experience, DPMNI has established itself as a trusted one-stop provider for property maintenance and asset care. Operating from the Innovation Factory in Belfast, the company supports organisations and property owners with reliable, cost-effective and responsive services designed to protect, enhance and maintain buildings, facilities and outdoor environments. (dpmni.co.uk⁠)

DPMNI offers a comprehensive range of services including facilities management, planned and reactive property maintenance, commercial and office cleaning, deep cleaning, end-of-tenancy cleaning, builders’ cleans, carpet and hard floor cleaning, and full external cleaning services. This includes roof, gutter, fascia and soffit cleaning, window cleaning, pressure washing, soft washing, driveway and patio restoration, and solar panel cleaning.

The company also delivers a wide range of building, repair and improvement works, including roof repairs, roofline installations, dry ridge and dry verge systems, property refurbishments, renovations, extensions, landscaping projects, industrial facility repairs and general building maintenance. Projects are managed from initial enquiry through to completion, providing clients with a single point of contact and a streamlined, accountable service.

DPMNI works across a diverse client base including commercial offices, retail premises, hospitality venues, educational facilities, healthcare environments, housing associations, industrial sites and public sector organisations. The business is built on strong operational standards, accredited training, and a consistent focus on health, safety, compliance and service quality.

Alongside its service delivery, DPMNI is committed to creating positive social impact within the communities it serves. The company actively supports local employment, invests in skills development and training, and provides opportunities for people to build long-term careers within the property maintenance and facilities management sector. Sustainability is also a key focus, with an emphasis on responsible waste management, efficient working practices and helping clients maintain and improve properties in a more environmentally conscious way.

As the business continues to grow, DPMNI remains focused on building long-term partnerships, investing in its people, and delivering innovative property solutions that help clients maintain safe, compliant and well-presented environments throughout Northern Ireland