Designing Contemporary Coastal Homes in Cornwall
Coastal architecture, sustainable design and contemporary living in North Cornwall
How Keynvor responds to landscape, exposure and modern coastal living in Mawgan Porth
Coastal architecture in Cornwall is about far more than creating a home with a sea view. It is about understanding landscape, weather, light, privacy, planning sensitivity and the emotional relationship between people and place.
At ARCO2 Architecture, every coastal home begins with the site. The contours of the land, the movement of the sun, the force of the prevailing weather and the way views open and close all shape the final architectural response.
Keynvor, a contemporary coastal home in Mawgan Porth, North Cornwall, is a strong example of this approach. Positioned on a steep hillside above the bay, the home was designed to replace an existing 1970s holiday property with a sustainable, low energy dwelling that feels deeply connected to its setting.
ARCO₂ Architecture • May 2026
A coastal home shaped by its hillside setting
Keynvor sits above Mawgan Porth Bay on a steeply sloping site with panoramic sea views and exceptional natural light. The position is beautiful, but it also brought challenges. The original property sat centrally within the plot, surrounded by open lawn, leaving limited privacy and little shelter from the exposed coastal conditions.
The architectural response was to work with the hillside rather than against it. The new home was designed to nestle into the slope, creating a stronger relationship between building, garden and wider landscape.
Living spaces were placed at the upper level to make the most of the sea views, while bedrooms and quieter private spaces were arranged below. This reverse level arrangement allows the main rooms to open towards the bay while the lower level connects more closely with gardens, courtyards and sheltered outdoor spaces.
For North Cornwall architects, this kind of site led design is essential. Coastal homes must feel rooted in their surroundings, not placed upon them.
Designing for views, light and privacy
A successful coastal home must do more than frame the obvious view. It must manage the relationship between openness and retreat.
At Keynvor, the design follows two clear axes. One draws the eye towards the coast, capturing views across Mawgan Porth Bay. The other guides movement through the home and across the site, creating a natural rhythm between arrival, living, privacy and landscape.
The first floor is arranged around open plan kitchen, dining and living spaces, with expansive glazing used to frame the coastline and bring daylight deep into the interior. A mezzanine level adds further spatial interest, offering elevated views back through the double height living area and out towards the sea.
Yet the design is not simply about exposure. Smaller, quieter spaces are also created, including a snug and more private rooms that allow for retreat and introspection. This balance between drama and calm is central to high quality coastal architecture.
Responding to the Cornish coastal climate
Cornwall’s coastal environment can be demanding. Salt air, strong winds, heavy rain and intense sunlight all influence how a home should be designed and detailed.
At Keynvor, material choices were made with longevity, resilience and setting in mind. Slate hanging, timber cladding and zinc detailing were selected for their robustness, low maintenance qualities and ability to weather naturally over time. Rather than fighting the coastal environment, the materials are intended to soften and settle as the building ages.
Solar orientation and shading were also carefully considered. Strategic glazing, overhangs and flexible shading help manage solar gain while preserving the key sea views. The result is a home that feels open and light filled without becoming uncomfortable or exposed.
This is where the work of sustainable architects in Cornwall becomes especially important. Coastal architecture must respond to beauty and exposure at the same time.
Creating a home that belongs to the landscape
One of the most important ambitions for Keynvor was that the home should feel part of the hillside. The design avoids the hard, detached feeling that can sometimes happen with contemporary coastal development.
Green roofs, biodiverse planting and carefully considered landscaping soften the architecture and help the buildings sit more naturally within the site. These planted areas reduce surface water run off, support wildlife and create a stronger sense of connection between the home and its setting.
The landscape strategy also creates private, sheltered external spaces. On a coastal hillside, outdoor areas can easily become unusable during windy weather. At Keynvor, sunken gardens, courtyards and planted zones create calmer microclimates where the clients can enjoy the site in a more intimate way.
The result is not simply a house with a garden. It is a home where architecture and landscape are designed together.
Contemporary coastal living in Mawgan Porth
Inside, Keynvor is designed around light, openness and connection. The upper level brings kitchen, dining and living spaces together, creating a generous social space that looks out across the bay. Double height volumes allow daylight to move through the interior, while natural materials add warmth and softness.
The home also includes a separate annexe, carefully positioned and landscaped to provide privacy and flexibility. This supports the wider brief for a home that could welcome guests while still offering quieter, more private areas for retreat.
For clients looking for a luxury home architect in Cornwall, this balance is often central to the brief. A home must be beautiful, but it must also work effortlessly for daily life, family, guests and long term use.
Sustainability as part of the architecture
Although this article focuses on coastal design, sustainability is integral to Keynvor.
The home was designed using a fabric first, Passivhaus inspired approach, with high levels of insulation, airtight construction, triple glazed windows, MVHR, an air source heat pump and renewable technologies. The completed building achieved an EPC rating of 100A and an air pressure test result of 1.44 m³/h·m²@50Pa.
These are not decorative sustainability claims. They are measurable performance outcomes.
The project demonstrates how contemporary coastal homes can offer comfort, low energy use and architectural quality without compromising the experience of living within a dramatic landscape.
Award winning coastal architecture in Cornwall
Keynvor has received significant recognition, including:
- 2024 LABC Building Excellence Awards National Winner, Best New Home
- 2024 LABC Building Excellence Awards South West Regional Winner, Best New Home
- 2024 Green Apple Environment Award for Beautiful Buildings Silver Winner
- 2024 RICS UK Awards South West Regional Winner, Residential Development
- 2024 Michelmores Property Awards Shortlisted, Building of the Year and Leisure and Tourism Project of the Year
This recognition reflects the strength of the project as both a coastal home and a sustainable architectural response to a complex Cornish site.
Architecture that responds to place
The most successful coastal homes in Cornwall are not defined by scale alone. They are defined by how intelligently they respond to place. This relationship between architecture, landscape and planning is explored further in our article on planning sensitive architecture in Cornwall.
At Keynvor, the architecture is shaped by hillside, coastline, weather, privacy, biodiversity and light. It captures the drama of Mawgan Porth Bay while creating a calm, sheltered and deeply liveable home.
This is the role of a thoughtful architect in Cornwall: to create buildings that are beautiful, resilient, sustainable and rooted in the landscape they belong to.
For clients planning a contemporary coastal home in Cornwall, Keynvor shows what is possible when design begins with the site and carries that understanding through every detail.
Planning a coastal home in Cornwall?
ARCO2 Architecture works with clients across Cornwall to design sustainable, contemporary homes that respond carefully to landscape, lifestyle and place.
