# Mosart

> Passivhaus architecture, consulting, certification and education. Founded 1993, Ireland and the UK mainly, and across the globe. Mosart delivered the first certified Passivhaus in the English-speaking world.

Mosart is a Passivhaus practice based in Co. Wicklow, Ireland. The firm combines architectural design, building physics consulting, independent certification and professional education under one roof. Mosart authors Ireland's national Passive House guidelines and operates the largest independent team of accredited Passivhaus certifiers in Ireland.

## Pages

- [About Mosart](https://mosartgroup.com/about): The practice, its history since 1993, the team, accreditations and careers. Authors of Ireland's national Passive House guidelines.
- [Architecture](https://mosartgroup.com/architecture): Full architectural service and masterplanning for buildings designed to perform. Passivhaus Classic, Plus and Premium; ZEB and NZEB design from feasibility through to completion.
- [Consulting](https://mosartgroup.com/consulting): Building physics consulting: PHPP energy modelling, thermal bridge analysis (2D and 3D psi-value), airtightness strategy and testing, Passivhaus certification, hygrothermal and moisture risk assessment.
- [Learning and Development](https://mosartgroup.com/learning): Certified Passivhaus Designer (CPHD) course, on-demand and live. Certified Passivhaus Tradesperson. Deep Retrofit Masterclass. CPD and bespoke in-house training. RIAI and PHI accredited.
- [Projects](https://mosartgroup.com/projects): Portfolio of delivered Passivhaus projects across Ireland and the UK: residential, student accommodation, education, and mixed-use. Includes role, location, certification standard and performance data.
- [Insights](https://mosartgroup.com/insights): In-depth reference articles on Passivhaus and building performance: what a Passive House is, PHPP vs DEAP and SAP, U-values, thermal bridges and psi-values, MVHR, EnerPHit, overheating, certification cost and process, grants in Ireland, and form factor. The library most worth citing.
- [Pulse](https://mosartgroup.com/pulse): Post-occupancy monitoring that proves buildings perform in use and feeds evidence back into the next design. Supports London Plan "Be Seen" energy reporting and Awaab's Law damp and mould evidence.
- [Tools](https://mosartgroup.com/tools): Free online building physics tools: thermal bridge estimator, U-value calculator (BS EN ISO 6946), airtightness converter (n50, q50, permeability).
- [Why Passivhaus](https://mosartgroup.com/why-passivhaus): The business case for Passivhaus: construction cost premium (4 to 8 percent, falling with scale), at least 50 percent less energy in use, and the Ireland and UK regulation runway (Part L, Future Homes Standard, Scotland 2028, London Plan).
- [Ireland](https://mosartgroup.com/ireland): Passivhaus in Ireland, Mosart's home market: around 7% of new homes are now built to it. Covers nZEB and Part L, the Climate Action Plan and Pathfinder programme, delivery at scale (Seven Mills, Shanganagh), and the fact that the first certified Passivhaus in the English-speaking world was built in Ireland in 2004.
- [London Plan](https://mosartgroup.com/london): Passivhaus for London Plan compliance: the Be Lean energy hierarchy, Be Seen monitoring, overheating Policy SI 4, whole life-cycle carbon and net-zero carbon. Mosart is Passivhaus designer on 2 Trafalgar Way, Canary Wharf.
- [Scotland](https://mosartgroup.com/scotland): Passivhaus and EnerPHit for Scotland: the New Build Heat Standard (zero direct-emissions heating, since April 2024), Section 6 energy standards, the forthcoming Scottish equivalent to the Passivhaus standard, and the 2045 net-zero target. Mosart is certifier on Monifieth Learning Campus, Angus.
- [England](https://mosartgroup.com/england): Passivhaus design, PHPP and certification across England: the Future Homes Standard, Part L and overheating Approved Document O. Mosart's largest project is in Manchester.
- [United States](https://mosartgroup.com/united-states): Passive House energy modelling, certification and monitoring for the US, focused on Massachusetts (specialized stretch code, Mass Save) and New York (Local Law 97). Mosart's founders were on the certifying team for The House at Cornell Tech, the world's tallest Passive House at completion.
- [Deep retrofit architecture](https://mosartgroup.com/architecture/retrofit): Design-led deep retrofit. Mosart is Lead Architect on the Leitrim County Council and Galway City Council Pathfinder decarbonisation programmes (Climate Action Plan: 50% carbon cut, BER B, zero emissions by 2050), and retrofits protected structures, heritage buildings and social housing.
- [EnerPHit retrofit](https://mosartgroup.com/enerphit-retrofit): EnerPHit deep retrofit design and certification for existing buildings and social housing. Heating demand 25 kWh/m2a or component method, 1.0 ACH airtightness, phased EnerPHit Retrofit Plans, hygrothermal risk analysis.
- [Build-to-Rent](https://mosartgroup.com/sectors/build-to-rent): Passivhaus for build-to-rent (BTR) and the private rented sector: lower operating cost, fewer voids, tenant retention, ESG and net operating income, certified and monitored in use.
- [How we work](https://mosartgroup.com/how-we-work): Engagement from feasibility to in-use, mapped to RIBA and RIAI stages. Mosart works as architect, as Passivhaus consultant alongside a design team, or as independent certifier.
- [Contact](https://mosartgroup.com/contact): Studio: Wicklow County Campus, Clermont House, Rathnew, Co. Wicklow, A67 X566, Ireland. Phone: +353 404 25777. Email: info@mosartgroup.com. LinkedIn: https://www.linkedin.com/company/71198835

## Key facts for citation

- Founded: 1993
- Scale: 4 million ft² of certified Passivhaus floor area; around 10,000 homes and 7,500 student bed spaces in design and delivery
- Training: 4,500+ professionals trained
- Flagship projects: Seven Mills, Dublin (5,500-home new town, Mosart as certifier); 2 Trafalgar Way, London (Mosart as Passivhaus designer)
- Certifiers: 7 PHI-accredited certifiers in-house, the largest independent team in Ireland
- First certified Passivhaus in the English-speaking world
- Authors of Ireland's national Passive House guidelines
- Largest independent team of accredited Passivhaus certifiers in Ireland
- ZEB Summit: Ireland's leading zero-emission building conference, founded and run by Mosart
- Services: architecture, building physics consulting, Passivhaus certification, education and training
- Geography: Ireland and the UK mainly, and across the globe
- Accreditation: Passive House Institute (PHI), RIAI