Semi-detached house, West London

Major remodelling and basement extension, substantial semi-detached house, West London

Semi-detached house, West London


Brief and Targets: Planning Targets of EcoHomes Very Good, 40% minimum for each of 3 Categories: Energy, Water, Materials
Sustainability Initiatives:
Results: Achieved Very Good rating and the 40% targets for Energy, Water and materials.

Energy-critical data:

Floor area: 677 m²
Mass: Existing semi-detached 4-storey family house. It is proposed to remodel the property using the current shell as well as building a new basement under the existing footprint to create a gym and pool complex with additional accommodation for staff under the front garden area.
Structure: Existing frame, New Steel frame to the basement.

Main materials:

Walls: U= 0.28, Typical external wall, cavity brickwork outer leaf, block inner leaf, celotex. U = 0.28, Basement wall, reinforced concrete, insulation, aerated block, render.
Roof: U =0.16, Pitched roof, ceiling at rafter line. U =0.17, Flat roof with insulation between joists.
Floors: U =0.17, Screeded concrete slab.
Windows: U-value =1.40, New timber frame windows.
Air-permeability: Default value
Psi-values: Default value
Insulation: GWP<5 (various)
Heating: 2 no. Heston Heat 45 Boilers, Emitters –Radiators and Underfloor heating system
Controls: Time and temperature zone control
Hot water: 700 Litres HWC
Ventilation: Extract ventilation to kitchen, utility rooms and bathrooms.
Cooling: Daikin RXS50L2V1B (Basement: Gym & media room, LGF: Family room & Casual Dining, UGF: Drawing room & Dining room, 1F: Master bedroom & dressing room, 2F: All 3no. bedrooms)
Renewables: None
Low E lighting: 85% Low-E Lighting

Points of Interest:

Removal of the entire ground floor and walls, including support of the whole upper floor structure on a steel frame to enable clear basement dig on a tight site with only main road access, limited road parking.
"I have worked with Abba on various projects over the last couple of years, they have always worked efficiently and the assessments provided have been accepted by the relevant local planning authorities. The assessments have assisted in me securing planning permission, which as a planning consultant, is what I require." - Town Planning Bureau

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New Build or Domestic Refurbishment? Call Abba Energy on 020 8208 8333 for expert advice on Sustainable Housing Design and Construction.