First Fix
Electrics, plumbing, and insulation before the walls close up
8 tasks in this phase
1
Electrical Layout Planning
How to plan your socket, switch, and lighting positions before the electrician arrives. Your room layout must be finalised first.
2
Plumbing Layout Planning
How to plan your water supply, heating, and waste pipe positions before the plumber arrives. Copper vs push-fit, boiler positioning, and the decisions that can't wait.
3 Free with email
First Fix Electrics: What Happens and What to Watch For
What first-fix electrics involves and the checks you must do before the plasterer arrives. Covers consumer unit placement, circuit types, Part P certification, and the communication failures that cause expensive rework.
4
First Fix Plumbing: Pipes and Connections
What first fix plumbing covers in a UK extension, costs (£4,000–£7,000), and the communication failures that turn a simple job into a 14-month paperwork nightmare.
5
Kitchen Electrical Provisions: What to Tell Your Electrician Before First Fix
The full list of kitchen-specific electrical provisions your electrician needs before first fix starts: worktop socket heights, hob and sink clearances, appliance dedicated circuits, Quooker socket, island floor wiring, and under-cabinet lighting.
6
Underfloor Heating in Your Extension
Wet UFH planning, installation, and screed for single-storey extensions. Liquid screed costs £2,000–£3,000, not the £800–£1,500 your builder quoted.
7
Kitchen Plumbing Provisions: What to Tell Your Plumber Before First Fix
The full list of kitchen-specific plumbing provisions your plumber needs before first fix starts: dishwasher and washing machine stubs, boiling water taps, water softeners, ice makers, and outside taps.
8
Insulation for Your Extension
How to get insulation right in your extension: types, U-values, building control, and what to check before plasterboard covers it all up.