We’re pleased to share progress on our latest coastal project in Downderry, Cornwall — a carefully considered replacement dwelling that demonstrates how thoughtful design can successfully navigate complex planning policy while delivering high-quality contemporary architecture.
Set within an Area of Great Landscape Value (AGLV) and located in a Coastal Vulnerability Zone (CVZ) on the Cornish coast, this scheme presented a series of significant planning challenges from the outset. The site’s sensitive coastal position required a robust and evidence-led response, particularly in relation to landscape impact, long-term coastal erosion, and compliance with both local and national planning policy frameworks.
Working closely with a multidisciplinary consultant team, the proposal was developed through a rigorous and iterative design process, responding directly to the Cornwall Local Plan, Climate Emergency policies, and the National Planning Policy Framework. Early engagement through pre-application discussions proved critical, allowing us to test key principles including scale, siting, and architectural approach.
One of the primary planning hurdles was demonstrating that a replacement dwelling in this location could be policy compliant. Under Policy 3 of the Cornwall Local Plan, redevelopment on previously developed residential plots can be supported — but only where proposals are demonstrably sensitive to their context. In this case, the existing building was of limited architectural merit and structurally compromised, creating a strong justification for replacement rather than refurbishment.
A second major challenge lay in addressing Coastal Vulnerability policy. Through a detailed Coastal Vulnerability Assessment, the design was carefully positioned to align with the existing footprint while remaining outside the projected 100-year erosion line. This alignment not only satisfied policy requirements but also helped maintain the established building line along Lower Road — an important consideration in preserving the character of the streetscape.
Equally important was the need to respond appropriately to the AGLV designation. Rather than competing with the landscape, the architecture adopts a calm, recessive material palette and a restrained form, balancing traditional proportions with contemporary detailing. The result is a building that sits comfortably within the eclectic character of Downderry while reinforcing a strong sense of place.
Sustainability also played a central role in overcoming planning constraints. The proposal aligns with Cornwall Council’s Climate Emergency Development Plan, through a fabric-first approach. It incorporates high levels of insulation, triple-glazed windows, airtightness, and renewable technologies such as PV panels and an air source heat pump. This represents a substantial improvement over the existing dwelling, both in terms of operational carbon and long-term environmental performance.
Ultimately, this project demonstrates how policy constraints — often seen as limitations — can instead act as a framework for better design. By engaging proactively with planning policy, embracing technical evidence, and maintaining a clear architectural vision, we’ve been able to unlock the potential of a challenging coastal site. We look forward to sharing further updates as the project progresses.
Please contact us, if you would like to discuss your own project.