KOTI (large)

Floor

Insulated floor base supported by plinth pads or ground screws and decked with sturdy boarding.

Walls

Traditional timber framed structure with 175mm PIR insulation. Dual residual cavities with options for external and internal finishes.

Roof

Insulated warm roof construction with options available for the covering. Internal finishes to match the wall interior.

Glazing

Double glazed aluminium units with standard security locks. Obscure glass to shower suites.

Heating

Low energy electric heaters with programmable features, electric towel radiators in shower suites and an 80ltr unvented system for hot water.

Kitchen

Fitted kitchen complete with appliances, choice of colours and worktop finishes.

Sanitary

Fitted shower suites with a basin, toilet, shower doors and non-slip flooring.

Thermal

U-Value (Walls): 0.12W/m2K. Glazing: 1.6W/m2K. Insulation: PIR @ 0.022W/mK. Cavity: 50mm, ventilated low emissivity to UV membrane.

Ventilation

Recommended Air Change Rate: Min. 6 per hour. Mechanical air flow rate: (without air conditioner Max. 54m3/hr) (with air conditioner Max 500m3/hr). Hood Extractor

Power

Circuit Power: 230v with RCD. LED: Dimmable. Extractor: Max 1.1kW, 12dB.

Infrared Panel/Electric Heater: 230v, Wattage subjected to volume. Air-conditioner if installed: 10K BTU <30m2, 2.8kW cooling, 2.3kW heating, <58dB.

Compliance

Part L: Yes. EC5: Yes. Guarantee: 10 year structural, 10 year IBG, manufacturers guarantees may apply. G3 certification for the tank, EICR for the electrical works.

When it comes to building an annexe, the Planning guidelines aren’t exactly clear and there are no proper definitions to allow for permitted development rights. We’d take a view on each project and would usually involve the help of our well-experienced consultant.

We’d make an application to your LPA on your behalf. The fee for this is charged upfront, and is deducted from the cost of your project should you choose to go ahead.

Since our projects are hand-built, the materials and components are transported by us. For projects further than 80 miles from IP25, we may need to charge a small fee for additional costs incurred.

Typically, a W8m x D6m would take around 10-12 weeks to build, excluding any planning timescales. We’d advise an estimated build time in the early stages of design, and we generally work with a lead time of around 8-10 weeks. We aim to be transparent with costs and timescales associated with your project, so that you are always fully informed of how things are getting on.

They’re hand-built, which means we can be flexible with how your building is going to be assembled. We’d require space to park at least one van, and we’d politely ask that the client provides any permits applicable to roadside parking/off-loading.