What is fixing height?
Fixing height is the height at which a building component, pipe or fitting is installed, measured from a reference point such as the finished floor level. Getting the fixing height right is essential for proper function and a neat finish.
Why is fixing height important?
An incorrect fixing height can lead to:
- Functional problems — a waste pipe at the wrong height won’t drain properly
- Aesthetic issues — switches and sockets at inconsistent heights look untidy
- Regulation compliance — building regulations specify minimum heights for handrails, balustrades and other elements
Application
Standard fixing heights
| Component | Fixing height |
|---|---|
| Socket outlet | 30 cm above floor level |
| Light switch | 105 cm above floor level |
| Basin tap | 85-90 cm above floor level |
| Kitchen worktop | 90-95 cm above floor level |
| Wall unit (kitchen) | 140-150 cm above floor level |
| Handrail | 90-100 cm above nosing line |
| Balustrade/balcony | Minimum 1100 mm (UK Building Regs) |
Tips for DIY builders
- Work from a single datum — mark a reference line on all walls and measure everything from that
- Use a laser level — a cross-line laser makes it easy to maintain the same height throughout
- Check the floor — floors are not always level; always measure from the datum line, not from the floor surface
Related terms
- Spirit level
- Building code
- Window frame
- Foundation depth
- Datum level
Learn more about building terms in our knowledge base at fredsdiyplans.com.