BSc, Building Surveying

PhD, Philosophy of Conservation Studies

Professional Associations

Accredited Mediator Friarylaw

Member of Institute of Directors

Chairman of Irish Damp Proof Association

Member of Guild of Master Craftsman

Member of the Irish Georgian Society and English Heritage


University College Dublin

University College Cork

Dublin Institute of Technology

Dundalk Institute of Technology

Royal Institution of Chartered Surveyors

Chief City Architects and Associates of Dublin City Corporation

Dublin Chamber of Commerce


Building Surveyor

Project Manager

Building Pathologist

Building Defects Consultant

Key Experience

Condition Surveys of existing buildings.

Conservation of historic structures.

Design solutions for the repair of treatment of dry rot.


Expert witness with over 25 years experience.

Founder member of the European Environmental

Dry Rot Research Association, in association with Dundee Abertay University, Hussvamp

Laboratories (Denmark) and EBS Building Services (London).

Developed non-destructive methods of surveying using minimum intervention techniques.


The aim of this research group is to eradicate the unnecessary use of chemicals in the domestic and commercial environment and to help retain as much of the original fabric of buildings as possible.

Ph.D, BSc. Building Surveying, CRST, ISBE

Managing Director 

Thomas, the founder of CONSURV Building Pathology, has devoted the greater part of his life to developing and researching methods of non-destructive treatment and protection of historic buildings and family homes - (Thomas pioneered several non intrusive exploratory techniques which has greatly reduced damage and costs normally associated with general inspection methods). He has completed the Foundation Civil and Commercial Mediation Training Programme. 

Thomas is actively involved in many European research projects including: European Research on Cultural Heritage, Histoclean and the ARCCHIP Programme funded by the European Parliament. He is the Chairman of the Irish Damp Proofing Association, Founder Member of the European Dry Rot Research Association and the Irish Director of the International Society for the Built Environment. He has lectured in Trinity, UCC, RICS, Dublin Chamber of Commerce, Bolton Street College, Chief City Architects and Associates of Dublin City Corporation, UCD and at other European Conferences. With a Doctorate in Conservation, Thomas has won the Conservation Award of Excellence and numerous awards for his work such as on the Old County Hospital Portlaois, Farmleigh House and 25 Eustace Street, Dublin.

  • Founder of Consurv Building Limited, (Building Pathology) and has devoted the greater part of his life to developing methods for the non destructive treatment and protection of historic buildings and family homes throughout the country. With a doctorate in conservation studies and a Bachelors Degree in Building Surveying, Dr. Brennan and his company apply their vast experience to preserving Ireland's structural heritage.
  • Dr. Brennan heads the European Environmental Dry Rot Research Association, which represents members of the Dundee Abertay University, Hussvamp Laboratories in Denmark and EBS Building Services in London. The aim of the research group is to eradicate the unnecessary use of chemicals in the domestic and commercial environment and to help retain as much of the original fabric of buildings as possible. The project was successful in achieving European funding under the Framework Programme.
  • Dr. Brennan participated in an EU Research Project under the funding programmes fifth framework programme – CRAFT. The objective of the CRAFT project was to develop a new measurement technology for mobile and non-destructive evaluation of the effectiveness of laser surface cleaning of historic stone surfaces.
  • Dr Brennan also contributed to a further EU Funded project for the Advanced Research Center for Cultural Heritage Interdisciplinary Projects at the Academy of Sciences of the Czech Republic. This center of excellence was founded to safeguard cultural heritage including social and economic aspects, interpretation, degradation and protection. ARCCHIP facilitates new international contacts, projects and networks. Civil engineering and architecture are the main fields of application for research results of the Institute. This tradition is more than 80 years old. An increased attention has been paid to safeguarding the built heritage and its integration into the life of contemporary society. The complexity of problems of cultural heritage calls for modern interdisciplinary approach and this has been started in a systematic way in 1995 by foundation of a new department in the Institute - the Associated Center for Historic Structures and Sites, joining together researchers from two institutes of the Academy of Sciences. The process continued, because of success in grant project competitions and now is involved, in collaboration with research scientists from other research institutes and universities, with two research units - one in Prague and one in another World Heritage City of Telč.
  • CONSURV, Building Pathology is one of Ireland's leading structural conservation companies. With over 30 years experience in Building Pathology, Dr Brennan and his Associates carefully apply their capabilities and knowledge to restore, protect and treat buildings from the damage caused by wood rot, insect infestation and rising and penetrative damp.
  • With a single mission to eradicate the causes of structural damage. Our methodologies of eradicating the use of unnecessary chemicals in a manner that will minimize the destruction of the original fabric of the building and the built heritage for future generations.

Previous Projects

Corbalton Hall, Co. Meath. Project Managed this project for the client Pat McDonagh. Employed as an expert witness and was involved in mediation on this project.

Farmleigh House, Dublin. Condition Survey, Conservation Report and Impact Assessment for repairs and refurbishment, on behalf of the Office of Public Works.

Headfort House, Co. Meath. Condition Survey and repair solutions due to defects as a result of moisture ingress, as part of a €5m refurbishment project.

Muckross House, Kerry. Condition Survey and Conservation Report for the Office of Public Works. The findings of this survey included a recommendation that the proposed €4m refurbishment was largely unnecessary and that the extent of repairs could be reduced to €1.5m.

Harper Campbell Building, Sligo. Condition Survey, Conservation Report, Impact Assessment and project management of repairs.

Brookfield House, University College Cork. Condition Survey, Conservation Report, Impact Assessment and project management of repairs.

Old County Hospital, Co. Laois. Condition Survey, Conservation Report, Impact Assessment and project management of repairs. Project was runner-up for the 2003 RIAI Conservation Award.

Hume Street, Dublin 2. Conservation Consultant and Project Manager for refurbishment works, including repair of facade and roof repairs to the valleys and parapet gullies.

63 Lower Leeson Street, Dublin 2. Condition Survey and repair solutions for the refurbishment of this 4-story terraced building.

Landenstown House, Co. Kildare. Conservation Consultant for refurbishment works and roof repairs, including Condition Survey.

Dawson Monument, Co. Monaghan. Conservation Consultant and Project Manager for cleaning and repair of this monument, including specification and methodology for the works.

Castle Hyde, Cork. Condition Survey and repair solutions for Michael Flatley’s €50m refurbishment. Acted as mediator on this project.

Model Arts School, Sligo. Condition Survey and repair solutions for defects due to moisture ingress.

St. Maur’s Church, Rush, Co. Dublin. Condition Survey, schedule of works and repair solutions as part of the refurbishment of this church, which dates from 1835.

Castle Leslie, Co. Monaghan. Condition Survey and repair solutions due to defects as a result of moisture ingress.

The Old Mill, Castlebellingham, Co. Louth. Condition Survey and repair solutions for the refurbishment and extension of the mill building.

About Us

When conservation is a key factor we can bring our extensive experience to review Protected Structures with the ability to give accurate Historical Analysis with a view to Stone Conservation. Our teams skills make us a wise choice for Project Management and Health & Safety and Schedule of works in the Conservation field.

Get in Touch

Telephone: +353 (0) 47 80450
Email: info@consurv.ie
Website: www.consurv.ie

Conservation House, Gallagh,
Clontibret, Co. Monaghan.