Jonathan Tuckey Wins Approval for Chalk and Hempcrete Surrey Home

Key facts

• Jonathan Tuckey Design has secured planning permission for a 533m² replacement house in rural Surrey.
• The bespoke three-bedroom design replaces a structurally defective 1970s bungalow on a sloping hillside.
• The building structure combines a timber frame with bio-composite hempcrete and cyclopean lime concrete.
• Autonomous building services include ground source heat pumps, solar arrays, greywater recycling, and a water borehole.
• The project team includes Jo Thompson Landscape Design, Webb Yates, Planit Consulting, and main contractor CC Construction.

Jonathan Tuckey Design has secured planning permission to construct a low-carbon country residence in Surrey that combines a timber structural core with cast hempcrete and cyclopean lime concrete. The 533-square-metre scheme will replace an unsound 1970s bungalow on a sloping rural plot, as first reported by Architects' Journal.

What has been approved in Surrey

The approved application establishes full planning permission for the demolition of the existing single-storey dwelling and the erection of a bespoke three-bedroom family home, known as Chalk House. Arranged across stepped levels that absorb the natural fall of the ground, the proposal incorporates dedicated health and wellness suites, a standalone hobby workshop, a swimming pond, and an enclosed walled kitchen garden designed to foster domestic food independence.

Working alongside landscape designer Jo Thompson Landscape Design, planning practice Planit Consulting, and multidisciplinary engineering consultancy Webb Yates, the architectural team devised a design strategy focused on heavy thermal mass, low embodied carbon, and self-sufficient site infrastructure. Rather than reading as a single monumental block, the domestic accommodation is partitioned across multiple linked volumes that visually reduce the overall physical bulk against the Surrey countryside.

The background and planning context

The application site accommodates a modest bungalow erected during the 1970s that had developed severe structural defects over decades of habitation, rendering standard domestic repairs unviable. Planning policies across the South East place stringent limits on new residential development outside defined settlement boundaries, requiring proposals for replacement dwellings to prove that any increase in floor area or footprint will not cause unacceptable harm to the openness, character, and ecology of the rural surroundings.

Planit Consulting prepared the planning justification by demonstrating that the bespoke dwelling replaces a compromised building with an enduring piece of contextual architecture that respects its topography. While replacement home schemes often provoke debate regarding size and landscape prominence—comparable to the dialogue surrounding AOMD's courtyard garden house in Langton Green—the planning presentation showed how embedding the ground floor into the chalk slope minimises external massing. The integration of sustainable drainage, ecological corridors, and native planting schedules satisfied local requirements governing rural building conversions and sensitive countryside plots.

The design, materiality, and performance

The construction methodology developed by Jonathan Tuckey Design and Webb Yates relies on a composite bio-based envelope. The load-bearing superstructure combines an engineered timber frame with monolithic hempcrete infill, offering exceptional thermal insulation, moisture regulation, and carbon sequestration within the external wall build-up. Hempcrete serves as both continuous insulation and a vapour-permeable substrate that mitigates internal condensation without synthetic membranes.

On the exterior, the walls receive a 100-millimetre-thick cyclopean lime concrete facing that incorporates chalk aggregates to anchor the architecture in the county's geological bedrock. Deep stone columns and flush lintel panels articulate the facades, creating rhythmic openings that frame views across the plot while shielding sensitive interior rooms from excessive solar gain. Similar low-carbon approaches that challenge conventional suburban forms have increasingly surfaced in contemporary work, such as Peter Morris's sculpted replacement house in Gospel Oak.

The house operates on net zero and all-electric principles supported by autonomous servicing networks. Space heating and hot water demands are handled by closed-loop ground source heat pumps linked to sub-surface horizontal or vertical collector arrays. Rooftop photovoltaic panels generate on-site electricity, while an on-site potable water borehole and advanced greywater recycling systems handle domestic water collection and reuse. A passive ventilation scheme relies on calculated thermal buoyancy and cross-drafts through high-level apertures, reducing active summer cooling loads.

What the design team and consultants say

Jonathan Tuckey Design positioned the home as a long-term contribution to estates and rural architecture that balances durability with delicate landscape stewardship. The practice stressed that the building envelope is tuned directly to its microclimate and biological surroundings, rather than asserting visual dominance over the hillside.

Paraphrasing the project's lead designers, the primary spatial ambition involved aligning the house with short- and long-range landscape horizons while establishing an architectural cadence that matches the hill's gradient. The studio noted that partitioning the floor plan into distinct components creates a readable tectonic rhythm, while generous glazed openings preserve a tactile connection with outdoor courtyards.

Describing the operational goals of the home, the practice highlighted its aspiration toward self-reliance, stating that the project seeks to deliver a dwelling with amenities that allow it to "function as independently as possible." Jo Thompson Landscape Design complemented this philosophy by specifying native hedgerows, wild grass margins, and an organic swimming pond engineered to cleanse water via natural aquatic filtration.

What happens next

With planning permission granted, the development moves into technical design coordination under an intended JCT Intermediate Building Contract with contractor's designed portion (CDP), negotiated through a two-stage tendering route. CC Construction has been identified as the main contractor, working alongside quantity surveying practice Regency Grove and Shore Engineering overseeing Construction (Design and Management) compliance.

Pre-commencement planning conditions will require local authority sign-off on exact material samples, including test panels of the cyclopean lime concrete facing and joinery mock-ups. Site clearance will involve the controlled dismantling and material salvaging of the defective 1970s bungalow before groundworks begin for the borehole installation and ground source heat loop trenches.

Why this matters

The approval of Chalk House illustrates how local planning authorities in the South East are accepting substantial replacement dwellings when high-performance bio-based construction and landscape-led design are central to the brief. By combining monolithic hempcrete envelopes with cyclopean lime concrete and autonomous off-grid utilities, the project establishes a robust precedent for rural homes that drastically lower upfront embodied carbon while delivering climate-resilient, self-sufficient residential architecture.

Questions answered

What is the Chalk House in Surrey?

Chalk House is a bespoke, 533-square-metre three-bedroom country home in Surrey designed by Jonathan Tuckey Design to replace a failing 1970s bungalow.

What materials are used to build Chalk House?

The house uses a timber frame insulated with monolithic hempcrete, clad in a 100-millimetre-thick exterior layer of cyclopean lime concrete with chalk aggregates.

Who is the landscape designer for the Surrey house?

Jo Thompson Landscape Design planned the surrounding grounds, which incorporate native species planting, a walled kitchen garden, and an organic swimming pond.

How will the replacement house generate heating and water?

The property integrates ground source heat pumps, solar panels, an on-site drinking water borehole, greywater recycling, and passive ventilation.

Who is the planning consultant for Jonathan Tuckey's Surrey home?

Planit Consulting served as the planning consultant, steering the replacement dwelling application through the local planning process.

Can you replace a bungalow with a larger house in Surrey?

Yes, replacement dwellings can be permitted in rural Surrey if the design respects openness, works with the landscape contours, and demonstrates high architectural quality.

Source: originally reported by Architects' Journal.