Electrical and Plumbing Rough-In Allowances for Modern South African Kitchen Extensions
Guide Type: Technical guide
Plan electrical and plumbing rough-in allowances for a modern kitchen extension: appliance schedule, points, drainage, ventilation, lighting and coordination before finishes.
Quick answer
Kitchen services are best priced from an appliance and cabinet layout before walls are closed. The rough-in allowance needs positions, loads, water and waste routes, extraction, lighting, isolation points and access for later installation.
How to compare the options
| Option | Best suited to | Include in the allowance |
|---|---|---|
| Electrical rough-in | A coordinated appliance, lighting and small-power layout. | Distribution capacity, dedicated circuits where required, point locations, isolators, data and inspection access. |
| Plumbing rough-in | A kitchen layout with defined sink, dishwasher, water and waste requirements. | Hot and cold routes, wastes, falls, valves, traps, drainage connection and leak access. |
Cost and planning checklist
- Freeze the cabinet and appliance schedule before final point positions.
- Coordinate the extractor route, ceiling services and roof or wall penetrations early.
- Use competent, appropriately registered professionals where required and obtain the relevant certificates or approvals for the actual work.
Use the estimator
Build an early, region-aware allowance in the Price Your Build free estimator. It is a feasibility tool, not a supplier quotation, final design or professional certification.
Related Building Glossary guides
Frequently asked questions
When should appliance models be selected?
Before final electrical and plumbing positions are fixed, because connection positions and load requirements vary.
Can services be changed after cabinets are installed?
They can be expensive and disruptive to change. Coordinated drawings and site checks reduce the risk.
Important
Confirm the final product, scope, installation method, drawings, approvals and professional requirements for the specific site before committing to work.
Source to check
Electrical Installation Regulations: www.gov.za/documents/occupational-health-and-safety-act-regulations-electrical-installation