SuperHome Database

Surrey, Surbiton, Douglas Road

House Summary

Liz Darley and Catherine Howett

House Type:
1940s end of terrace

Carbon saving:
62% - Remote Assessed  

  • Darley SH PV
  • Darley SH wood stove

Measures installed:

  • Condensing boiler
  • Double Glazing
  • Draught-proofing
  • External Wall Insulation
  • Floor Insulation
  • Loft Insulation
  • Low Energy Appliances
  • Low Energy Lighting
  • Roof Insulation
  • Solar PV Panels
  • Water Saving Devices
  • Wood Stove

Upcoming events

Early interest in Open Days encourages SuperHome owners to host more events. If you'd like to visit this property please contact the owner and let them know. SuperHomers are often happy to respond to questions about their refurbishment project by email between times. Please read ‘more on contacting this SuperHomer’ before you make contact.

What visitors are saying

“Our hosts were very welcoming and went to a lot of trouble to demonstrate what they had done to the house. They provided samples of products they had used so that we could see for ourselves how they had tackled the work.”

“Really well designed home and interesting to see and hear about all the energy saving improvements.”

Personal story:

We are Liz and Catherine and we own this lovely 1940s end of terrace property in Surbiton.  Liz is a civil engineer and sustainability professional, Catherine is a drama teacher.


There were lots of motivations, principally our aim was to improve the value of the house by extending and modernising, whilst at the same time creating a home that fits with our environmental principles in construction and use.

Having worked within the construction industry on designing and specifying sustainable materials I wanted to take the opportunity of this house renovation to put my years of consultancy experience into practice.  One of our principal aims was to ‘use our wallet as our weapon’ so we have tried as much as possible to use low impact materials to achieve our aim of a warm comfortable home.

As well as the energy performance of the house, we also wanted to use the house renovations to incorporate as many reclaimed and re-used materials as possible (firstly items coming out of the house itself, such as loft beams made into our dining room table and then local waste products – such as pallets to make in built wardrobes.)

Property background:

The house was built in 1948, it is solid brick construction with concrete floor joists.  When we bought it in 2011 it had had one previous owner and contained all the original 1940s wiring!  The previous occupant had done very little to the house in the 60 years he had owned it other than install a new condensing gas boiler in 2010.   It’s the end of a terrace with 3 bedrooms, 1 bathroom, living room, dining room and small kitchen.

Key changes made:

Overall the house was in need of modernisation so we decided to knock down some walls and extend out to create a single kitchen/dining area as well as do a loft conversion to add an extra bedroom.  As there was a whole lot of work going on already we decided to upgrade the energy performance of the house at the same time.

Measures installed in detail:


Pitched Roof and dormer – Actis Tri-iso super 10+ with 50mm wood fibre insulation from Pavatex

Flat roof to new build extension

  • Living roof
  • 175mm NBT pavatex woodfibre insulation

Under floor existing building – 140mm sheeps wool insulation laid between concrete joists, existing floorboards

Underfloor new build extension –

  • 210mm NBT pavatex woodfibre insulation

External wall new build extension

  • 2 coats lime render
  • 120mm NBT Diffutherm woodfibre external wall insulation
  • 150mm NBT pavatex wood fibre insulation between studs

Double glazed windows

  • Bereco u-value 1.37W/m2K throughout

Solar PV system – 1.7kWp

  • Sharp 190W solar modules
  • Sunny Boy 1700W inverter

Wood burning stove – Morso 04

Twin coil cylinder for future solar thermal install – Joule Cyclone CY200l Twin

Draught stripping throughout

Low energy lighting – 90% LED

Low energy and low water appliances

Low flow taps, toilets and shower heads throughout

TRV radiator valves throughout + digital heating controls

Benefits of work carried out:

Our new extension is really toasty, there are plenty of evenings when cooking dinner heats up the space and we don’t need any additional heating, also the heat is retained in the space and it stays warm for a long time.  I also love the daylight from our roof lights.

A personal benefit has been learning lots of new skills as we did a lot of work ourselves!

Favourite feature:

The wood burning stove is really lovely and snug plus we get all our wood from local tree surgeons for free!

Contact this homeowner

Assessment types

SuperHomes Assessed

A home that has been visited and assessed by us and confirmed as reaching the SuperHome standard, which demonstrates a 60% carbon saving.

Homeowner Reported

Information has been provided by the homeowner about their home and energy use prior to the installation of measures and following their installation which demonstrates a carbon saving. This information has not been verified.

Remote Assessed

The homeowner has provided information on their home including what measures have been installed which has enables an assessor working on our behalf to assess their carbon savings. This home has not been visited to verify the measures installed.


This home has not been assessed, but the homeowner has reported what measures have been installed. It may be that this home is awaiting assessment.