Rosebury Farm

The Brief

We are currently providing a multi-disciplinary service on this private residential development in rural Hertfordshire. The brief is to construct three spacious modernist family homes via a high spec, highly sustainable design which also complements the natural beauty of the surrounding green-belt countryside.

Plot 1 is a self-build dwelling for the client, whilst Plots 2 and 3 are custom built homes for sale. All three properties offer open plan well-proportioned accommodation, with the primary living spaces located on the ground floor. Although unique in size, layout and interior design, each home is tied together via shared architectural style and material palette choice. Plot 1 also has an accessible bedroom suite at ground floor level for an elderly relative.

External works include the addition of an access road and car parking spaces along with hard and soft landscaping of each large private garden.


Hotspot Investments




Squared Architects


21,367 ft²


  • Residential Developments


  • Project Management
  • Cost Consultancy
  • Contract Administration
  • Health & Safety (CDM)

The Challenge

The site at Rosebury Farm was contaminated with hazardous and non-hazardous material found from surface level down to 500mm deep. With help from our project management team a scheme was agreed with the Local Authority which meant that surface found asbestos was remediated and taken off site. Contaminants found in the sub-soil were then stockpiled, inspected, tested and safely re-used at the bottom of the basement excavations. This clever re-use of contaminated material created a substantial cost and carbon saving opportunity for the project.

Our cost consultancy team procured the project in two phases, split between a number of packages in order to further maximise cost and programme efficiencies. A key part of the procurement strategy was the early appointment of the prefabricated timber frame specialist, who was then able to progress with the detailed design which includes the roof structure, closed panel external walls, intermediate floors, internal stud walls and associated frame support system.

The Outcome

Construction is currently underway and due to complete in late 2023. High spec M&E services will include chilled ceilings, underfloor heating, Air Source Heat Pumps, PV panels on roof and KNX smart control systems.

The design is targeting 0.14W/m2 thermal performance for the walls and roof, partly achieved via high air tightness and triple glazed windows. This will give each property an Energy Performance Certificate (EPC) score of 98%, making them near Passivhaus standard. Only 1% of homes in the UK currently achieve this EPC score.

Internally the finishes will include the use of high quality materials throughout including in the bespoke kitchens and bathrooms.

Image copyright Squared Architects.

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Other Projects We’ve Completed Include

Pinnacle N10

South Molton Street & Browns

Walcot Square Mews