Coulsdon-based ASD Builders have helped to transform a plain, unassuming dwelling in Warlingham, Surrey, into a contemporary, unique residence that’s now accessible for people with all levels of mobility.
The original house was built on two levels, with the lower level forming a partial basement at the front of the property. The main front door access was via external steps up from the driveway while a separate double garage formed the only available vehicle storage and parking.
The initial brief from Peter, the client, was to redesign the layout of the existing house and provide a new entrance that enabled level access from both the drive and the garage. This included a new platform lift to ensure suitable internal access between levels. The house had to provide a flexible living space on separate levels so the lower level could be divided off if required when the house was is in sole or low occupancy, to help save on heating costs.
Following Westview’s major redesign, Peter can now park in the integral garage and directly access the new mezzanine level, via the lift, enabling smooth access between the lower and upper levels.
The house also includes a multitude of sustainable design features that have significantly minimised the environmental impact of the old building.
Sustainable features and technologies include:
- 4Kw photovoltaic system
- Rainwater recycling system
- New energy efficient boiler and heat pump
- Low energy lighting throughout
- Sedum roof
The new external walls were designed and built to a higher standard than is required of extensions to existing buildings, achieving a U-value of 0.22W/m2K. The current energy efficiency rating of the house is now 87, a high ‘B’ rating – up from the initial low ‘C’ rating of 70.
The sedum roof, in addition to providing an attractive, roof-level habitat, also contributes to the management of surface water run-off and the mitigation of local air pollutants, as well as extending the life of the roof membrane.
As owner-project manager, Peter was involved throughout, with input into the design from concept stage. This included landscaping, choice of finishes and the research behind all the incorporated sustainable features.
The co-operation between all parties in the project team, including Tandridge Building Control, ensured a smooth running operation from start to finish. It also meant information and ideas could be discussed and solutions found.
One particular example of an innovative solution was the guttering to the roof of the rear extension, with its unconventional outline.
The main contractor came up with the idea of an ‘invisible’ box gutter in leadwork behind the fascia, which was beautifully crafted and finished – but somewhat disappointing that it cannot be seen!
The overall outcomes of the project have satisfied the clients’ brief and created a house with a ‘wow’ factor that is fully accessible to all, highly sustainable for the future and finished with top quality materials to a high level of craftsmanship.
The project was highly commended at the LABC SE Building Excellence Awards 2016 in the Best Domestic Extension and Conversion category, where judges noted its “innovative and inclusive design, sustainability attributes and cooperative approach of the whole team”. ASD Builders were also commended for their “attention to detail and quality of workmanship”.
The transformation of Westview has created a stunning house with a flowing layout that enjoys the great views afforded by its location.
Tandridge Building Control has produced a helpful Guide to Extending your Home to explain more about the building regulations process and how it applies to various types of home alterations.
Original concept and planning permission/Building Regulations approval –
Louise Benjamin Architectural Services. Tel: 01883 740420
Building Contractor – ASD Builders Ltd. Tel: 0208 668 3162
Structural Calculations – Modulus Structural Engineering Ltd. Tel :01256 768588
Energy Assessment – Dynamic Energy Assessors. Tel: 0800 090 1605
Tandridge Building Control. Tel: 01883 732871