Passivhaus Affiliate

Standard Members

Naked House Ltd


A naked house is a pre-fabricated timber frame, fully functioning ultra low-energy building, up to Passivhaus standard. Our building system can accomodate almost any design of house and is constructed in a modular fashion. The naked house method enables all builders to deliver a successful Passivhaus construction for outstanding value. Combining the expertise of the award winning teams at Princedale Ecohaus and GreenSteps, naked house Ltd was formed in 2015 to deliver an outstanding Passivhaus construction package. The naked house package consists of a pre-fabricated timber frame system, including all the structural calculations and drawings, technical design work, heating, hot water and ventilation systems to deliver the assembled building as fully operational. Electrical ducting, plumbing systems and ventilation pipe runs are pre-installed into the wall panels to reduce site time and improve quality.


New Bold Design

County Durham

New Bold Design Limited is an architectural design and project management consultancy, led by the Director, Philip Newbold, which draws on over 35 years experience in the public and private sectors encompassing all types of construction projects for a wide variety of Clients. In addition to a full range of mainstream architectural services we specialise in three main areas of building design :- ACCESSIBLE DESIGN For the last twenty years or so Philip has developed his knowledge and experience in the design of buildings for people with disabilities, both in large scale multiple-user projects for commercial Clients and in domestic projects for individual Clients with special needs. SUSTAINABLE DESIGN For the last ten years or so Philip has taken an increasing interest in low-energy building technologies and energy conservation. He recently qualified as a Certified European Passivhaus Consultant at the University of Strathclyde and is a member of the AECB and the Passivhaus Trust. CONSERVATION DESIGN Throughout his career, Philip has been recycling old buildings, either by adapting or extending them for a new use or restoring them to extend their existing life including everything from modest domestic extensions to major new build projects and multi-million pound Listed Building conversions.


NIBE Energy Systems Ltd


NIBE ENERGY FOR LIFE. NIBE Energy Systems Ltd is a subsidiary of NIBE Climate Solutions Business Area based in Sweden and is a leading European manufacturer in the sustainable energy sector. The company is committed to sustainable construction and specialises in providing high-tech energy-saving solutions for heating, ventilation, cooling and heat recovery. It offers Energy for Life when it comes to renewable heating solutions, from ground source, air source and exhaust air heat pumps to solar thermal packages and whole-house ventilation. NIBE also prides itself on delivering a variety of training courses at locations across the UK, aimed at providing installers with all the knowledge and expertise needed to carry out efficient, start-to-finish installations. For more information, visit


Nicola Donaldson


Nicola Donaldson Chartered Architect is an independent architecture practice where the focus is on simple, innovative and functional design.


Noel Wright Architects



Novo Design Studios Ltd