Detached - select this if you aren't connected to any other properties
Semi-Detached - select this if you're connected to one other property or at the end of a terrace.
Terraced - select this if you're in the middle of two adjoining properties
Flat/Apartment - select this if you live in either a single or multi-storey block of flats/apartment
Other - select this for any other type of space to be heated, i.e outdoor/warehouse.

An Eco-house (or eco-home) is an environmentally low-impact home designed and built using materials and technology that reduces its carbon footprint, lowers its energy needs with higher than normal levels of thermal insulation.

New Build - Any property built, first occupied in its current state or significantly modernised, refurbished or altered within the last two years.

A+ Insulated - These properties represent the highest quality buildings in their market and area. They are generally newer properties built within the last 15 years with top amenities. 

A Insulated - These properties are one step down from Class A+ and are generally older (16-20 years), tend to have less insulation, no double glazing. 

A- Insulated - These properties are typically more than 20 years old and are generally in need of renovation, such as updating the building infrastructure to bring it up-to-date. 

Don't know - We will base our calculations on the worst-case insulated property (A- Insulated). This will provide an estimate that can more than likely be improved upon.