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Architecture
Urban Design
Conservation

Welcome to Rejen Architects

Breathing new life into old buildings and places

We are a Belfast-based architecture practice specialising in reimagining, repurposing, and regenerating buildings and places. Our services span architecture, urban design, and conservation — across hospitality, workplace, residential, and healthcare sectors. Our work blends contemporary design with a deep respect for context, craft, and heritage. From boutique hotels to innovative workspaces, we help clients unlock the potential of their buildings and sites — creating places that are vibrant, healthy, and sustainable. In addition to our main Belfast studio, we have recently established a Dublin base to support a growing portfolio across Ireland, and are partnering with London based Haines Philips Architects to deliver projects in London and the Southeast.

Projects

Hotel & Hospitality
Workplace & Office
Residential
Healthcare
Private Homes
Other

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Quotes
Quotes
  • Andrew McCloskey | Managing Director - Cathedral Living

    Rob is one of the most meticulous, thoughtful, and professionally diligent architects I’ve encountered. He played an essential role in our projects—not just as a designer but as a proactive leader who worked with contractors and consultants to bring everything in on time and under budget

  • Colin Johnston | Managing Director - Galgorm Collection

    Rejen have brought real vision, detail, and sensitivity to our work at both Galgorm Resort and Galgorm Castle. Their ability to balance bold ideas with deep respect for historic fabric, and to work collaboratively with planning and heritage authorities, has made them a key partner in delivering our long-term vision.

Core Services

Architecture

Rejen Architects offers bespoke architectural services that transform spaces into vibrant, functional, and sustainable environments. Whether repurposing existing buildings, extending structures, or creating new developments, we deliver innovative designs that balance creativity, practicality, and environmental responsibility. Our team works closely with clients to unlock the full potential of their projects, ensuring that each design enhances the user experience, aligns with sustainability goals, and meets financial objectives. With expertise across various sectors, we tailor our approach to meet unique project challenges, delivering exceptional results that inspire and endure.

Our Services

Urban Design

Rejen Architects brings a people-focused approach to urban design, shaping dynamic and sustainable places that foster community and enhance quality of life. We specialise in creating masterplans and public spaces that integrate
seamlessly into their context, balancing modern needs with cultural and environmental sensitivity. Our designs prioritise connectivity, accessibility, and inclusivity, promoting vibrant environments where people can live, work, and thrive. Through collaboration with stakeholders and meticulous attention to detail, we deliver urban design solutions that are not only functional and attractive but also catalysts for regeneration and long-term prosperity.

Our Services

Conservation

As accredited Conservation Architects, Rejen offers expert guidance in preserving and revitalising heritage buildings. We specialise in adaptive reuse and sensitive interventions that respect each structure’s historical and cultural significance while adapting it for contemporary use. From listed landmarks to heritage assets, our designs ensure compliance with planning regulations while delivering innovative solutions that honour the past and embrace the future. By combining deep respect for history with modern ingenuity, we help clients breathe new life into historic spaces, creating buildings that are both enduring and transformative.

Our Services
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