This was a design-and-build commission for a client we met at the Grand Designs Exhibition in 2015. We were responsible for all aspects of this ground-floor extension – from feasibility study to fitting out and finishing its kitchen/diner, along with remodelling of the upstairs bathroom and master bedroom. The project was completed in 17 weeks.


This attractive Edwardian four-bedroom house had been extended historically. Our client wanted to create a spacious new kitchen and dining area by extending further, to the side and rear. 

Having mapped out the technical challenges and cost in a feasibility study, we prepared an outline design for a single-storey extension, covering some 60 square metres, and submitted the planning application and drawings.

As main contractor and project manager, Hyssop Project also procured and supervised all the subcontractors and specialists required – including the architect, structural engineers, party wall surveyor and assessor for the statutory SAP energy rating.

The works

Extensive steelwork was required to support the upper floor, and its master bedroom and en suite bathroom at the rear and side of the property. The walls of the extension were built in blockwork, with a silicon rendered to match the front of the house.

Making best use of the space created, we incorporated a utility room discreetly behind a back of kitchen cabinets, along with a boiler/linen room, and a downstairs toilet.

Upstairs, we removed the dividing wall to unite the family bathroom and toilet

The project also involved the installation of bi-folding doors to the garden, under-floor heating, solar-powered fittings (see below).

As the client selected a substantial amount of the finishes for the project, we provided advice to ensure the budget was maintained and the various materials were workable. The palette of colours for the kitchen interior was matched closely to a treasured seascene painting now hanging in the new space. 

Notable elements of the project included:

In the kitchen:

  • Schüco bifold door with internal solar-powered blinds
  • Velux window units also solar-powered with blinds
  • bespoke kitchen units and island with a cottage-style finish were manufactured to echo the new barn doors on the other side of the property 
  • a skylight (measuring 2 x 1 metres) to lighten the dining area
  • cedar timber cladding to the ceilings 
  • a new boiler and Megaflow unit with a water underfloor heating system throughout.

In the master bedroom the window openings were enlarged to provide additional natural light.

Its en suite features:

  • Italian white and electrical blue glass basins and cabinets 
  • electric under-floor heating
  • cabinets and matching mirror
  • shower and basin controls within concealed units
  • free-standing toilet
  • grey vertical (1000x200mm) porcelain wall tiles 

The family bathroom features:

  • electric under-floor heating
  • swivel bath taps built into elevated wall section along with controls and handheld shower
  • a freestanding toilet with recessed storage pockets
  • Calacatta Viola polished marble tiles (600x300mm)
  • CP Hart sanitaryware and fitting