CASS Architects

CASS Architects

Who are we?

Who are we?

Who are we?

At CASS Architects we see our emphasizes on understanding our clients brief, the overall financial investment, development schedule and program as key to providing a sustainable building and site works as fundamental to innovative and imaginative design. Our projects combine sustainable technology and forward-looking approaches to both rural and urbanism architecture. We see an acceptable sustainable approach to design and construction as an obligation to the future of the built environment and are committed to this vision in each project

CASS Architects was established in 2018 as a RIAI Registered Practice and is the successor firm to OKM Architects one of the longest established Architectural firms on the West of Ireland. Seamus Casserly MRIAI/ RIBA began his Architectural Career in the mid 80’s and is the managing director of both firms until the graduation of Conor Casserly as Bachelor of Architecture and MRIAI thus the creating of CASS Architects Ltd

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Projects completed

Projects completed

Projects completed

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Awards Received

Awards Received

Awards Received

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Years of experience

Years of experience

Years of experience

Seamus Casserly, MRIAI

Practice Managing Director, MRIAI , RIBA and International member of The American Institute of Architects Seamus has encompass extensive experience since the early eighties throughout Ireland,the USA and in the UK on several project types including High Rise Buildings, Large Retail Centre Developments, Mixed Use Buildings, Educational facilities, Detention Buildings , Student Accommodations and Bespoke Residential Homes all of which he has had several roles from coordinating to leading environmental, civil, architectural and engineering development teams.

Conor Casserly, MRIAI

Conor studied Architecture in the University of Limerick graduating with honours in 2018. Conor has worked in offices in New York and Ireland focusing on educational, Garda, historic and fit-out projects. During this time, Conor undertook his studies in Architectural Practice from Univiserity College Dublin allowing him to gain membership to the Royal Institute of Architects of Ireland in 2022, while concurrently obtaining a Post Graduate Dipolma in Project Management from Trinity College Dublin in 2021. Conor is presently operating the Dublin office.

CASS Architects

We see an acceptable sustainable

approach to design and construction as an obligation to the future of the built environment and are

committed to this vision in each project.

Contact

Republic of Ireland:

Sligo/Roscommon Office:

(+353) 87-757-1622

Dublin Office:

(+353) 86-2175580

Address

Main Office:

1st Floor, Old Bank Building, O'Connell Street, Sligo, F91 VAK2, Ireland


Remote Offices:

Dublin

Roscommon

© 2025 by Samantha Casserly

CASS Architects

We see an acceptable sustainable

approach to design and construction as an obligation to the future of the built environment and are

committed to this vision in each project.

Contact

Republic of Ireland:

Sligo/Roscommon Office:

(+353) 87-757-1622

Dublin Office:

(+353) 86-2175580

Address

Main Office:

1st Floor, Old Bank Building, O'Connell Street, Sligo, F91 VAK2, Ireland


Remote Offices:

Dublin

Roscommon

© 2025 by Samantha Casserly

CASS Architects

We see an acceptable sustainable

approach to design and construction as an obligation to the future of the built environment and are

committed to this vision in each project.

Contact

Republic of Ireland:

Sligo/Roscommon Office:

(+353) 87-757-1622

Dublin Office:

(+353) 86-2175580

Address

Main Office:

1st Floor, Old Bank Building, O'Connell Street, Sligo, F91 VAK2, Ireland


Remote Offices:

Dublin

Roscommon

© 2025 by Samantha Casserly