DIRECTOR
REGISTERED ARCHITECT, NZRAB #3508
BACHELOR OF ARCHITECTURE (UNITEC)

Yvette is a registered architect with over 23 years of professional experience, honed in both international and local contexts within New Zealand's design-focused practices. Her career highlights include delivering a diverse array of project typologies, including award-winning endeavours during her tenures at Herbst Architects and Stevens Lawson Architects.

Known for her dedication to excellence, Yvette thrives in collaborative environments, infusing projects with energy and commitment to achieve innovative design solutions tailored to project specifics. Yvette firmly believes in the architect's role in delivering high-performance buildings that benefit clients, the environment, and the community at large. This conviction has driven her continuous pursuit of knowledge, integrating new insights into each project she undertakes.

Yvette's approach underscores a deep-seated belief in responsible architecture, where each design not only meets but exceeds expectations, fostering sustainable and impactful outcomes. Her passion for delivering meaningful architectural solutions underscores her commitment to enhancing the built environment while positively influencing everyday lives.

DIRECTOR
REGISTERED ARCHITECT, NZRAB #5603
BACHELOR OF ARCHITECTURE (UNITEC)

Stephen is a registered architect with over 18 years of professional experience, successfully crafting and managing a diverse range of projects across New Zealand, from small-scale developments to large, complex endeavours.

After a distinguished career at renowned practices including Stevens Lawson Architects and Architectus, he established Lammas Architects in 2019. Stephen was joined by Yvette Overdyck in 2024, and together they rebranded the practice as Lammas Overdyck Architects.

Stephen is celebrated for his design talent and his proven ability to manage project teams.
His approach combines a deep care for each project outcome with meticulous attention to detail. He resonates deeply with the philosophy that “quality hurts once.” By investing in quality—whether it be time, money, effort —at the outset, projects tend to run more smoothly, ultimately leading to more satisfying results and avoiding higher costs and regret later on.

With a rich portfolio of award-winning work spanning high-end residential, medium-density housing, master planning, education, civic, and commercial sectors, Stephen brings a wealth of experience to every new endeavour.

PRACTICE MANAGER
BA (UNIVERSITY OF AUCKLAND)

Jessica takes on the role of practice manager at Lammas Architects.

Additionally, she works part time as a secondary school teacher and is a busy mum of three.

With her pragmatic organizational skills, and ability to manage 50 open tabs in her brain at any given moment, Jessica works behind the scenes ensuring that the business runs smoothly.