Our Services

Unlocking Potential,

Creating Value, Delivering

Sustainable Projects

What we do

At Rejen Architects, we help clients unlock the full potential  of existing buildings, sites, and regeneration opportunities. We specialise in addressing the challenges of working with older  and historic buildings, while seamlessly integrating new architecture where needed. Our expertise combines adaptive reuse, retrofit and decarbonisation strategies, and sensitive contemporary design — all focused on creating distinctive, sustainable, and commercially.

Core Services

We provide a full range of Architecture, Urban Design, and Conservation services, aligned with both the RIBA Plan of Work and RIAI Work Stages. Our projects span hospitality, workplace, healthcare, residential, cultural, and mixed-use sectors across Ireland and the UK. Whether adapting existing buildings, designing sensitive extensions, or delivering high-performance new-builds, we help clients deliver sustainable, commercially successful, and enduring projects.

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.

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.

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.

Architecture

Urban Design

Conservation

Services

In addition to our core architectural services, we offer bespoke packages tailored to meet the specific needs of each client and project. From early- stage feasibility and development strategy to targeted retrofit, conservation, or advisory roles, we adapt our services to suit project goals and delivery models. We work flexibly, providing the right level of input at the right time —
whether supporting at feasibility stage, acting as client-side advisors, or leading full project delivery.

Strategy & Feasibility

Feasibility studies and strategic development advice
Viability assessments for adaptive reuse, retrofit and new-build
Option studies balancing commercial, planning, and heritage factors
Early-stage sustainability and carbon-reduction strategies

Architecture & Adaptive Reuse

Full architectural design services
Adaptive reuse, contemporary extensions, and integrated new-builds
Masterplanning and complex site development
Unlocking commercial, cultural, and environmental value

Retrofit & Decarbonisation

Retrofit strategies for older, historic, and mixed-use buildings
Deep retrofit and fabric-first approaches
Expertise in Passivhaus, EnerPHit, and low-carbon design
Passive design optimisation and embodied carbon reduction

Regeneration & New-Build

New-build design integrated within sensitive and urban contexts
Sustainable design meeting or exceeding net-zero ambitions
Low embodied carbon material strategies and passive design
Seamless connection between new and existing buildings or public realm
Regeneration projects involving integration in larger urban contexts

Conservation & Heritage

Conservation architecture and heritage-led design
Heritage Impact Assessments and Statements of Significance
Heritage approvals and negotiation
Sensitive integration of old and new

Interior & Fit-Out

Interior architecture and fit-out services for hospitality, workplace, healthcare, and residential projects
Design focused on guest and user experience, operational efficiency, and brand alignment
Coordination of fit-out works including finishes, detailing, and integration
of FF&E
Visualisation, VR, and storytelling to communicate design intent and
secure client and stakeholder buy-in

Delivery & Execution

Construction documentation and specification
Phased delivery strategies for occupied and sensitive sites
Contractor engagement and construction-phase services
Handover and post-occupancy support

Bespoke

We tailor our services to suit each project’s unique requirements, offering:

Flexible service packages aligned to client goals and project complexity
Customised combinations of advisory, design, retrofit, conservation, and delivery services
Specialist input for feasibility, funding, or planning where needed
Adaptable support from early-stage advice to full project delivery