What Is the Golden Rule for Stairs? A Complete Guide for Safe and Comfortable Stair Design
Designing a staircase might seem simple, but getting it wrong can lead to safety hazards, building regulation issues, and an uncomfortable climb that people notice immediately. That’s where the Golden Rule for stairs comes in. Whether you’re renovating, extending, or building a new home, understanding this rule is essential for creating stairs that are safe, functional, and compliant.
This guide explains what the Golden Rule is, why it matters, and how it affects your project.
Understanding the Golden Rule for Stairs
The Golden Rule for stairs refers to the ideal relationship between the rise (the height of each step) and the going (the depth of each step). The rule states:
2R + G = 550–700mm
Where: R = Rise G = Going
This formula ensures that stairs are comfortable and safe to use. If the rise is too high or the going too shallow, the staircase becomes steep and difficult to climb. If the rise is too low or the going too deep, the staircase becomes awkward and inefficient.
The Golden Rule helps designers strike the perfect balance.
Why the Golden Rule Matters
Staircases are one of the most heavily used features in any home. Poorly designed stairs can lead to:
- Trips and falls
- Difficulty for children or elderly people
- Building regulation failures
- Reduced property value
- A staircase that simply feels “wrong”
The Golden Rule ensures your stairs are:
- Comfortable
- Safe
- Easy to climb
- Compliant with UK Building Regulations
- Suitable for all ages and abilities
How the Golden Rule Works in Practice
Let’s break down the formula:
1. Rise (R)
This is the vertical height of each step. In UK homes, the typical rise is 170–190mm.
2. Going (G)
This is the horizontal depth of each step. The typical going is 220–250mm.
3. The Formula
Using the Golden Rule:
2R + G = 550–700mm
Examples:
- If the rise is 180mm, and the going is 250mm: 2 × 180 + 250 = 610mm (perfect)
- If the rise is 200mm, and the going is 200mm: 2 × 200 + 200 = 600mm (acceptable, but steep)
- If the rise is 150mm, and the going is 300mm: 2 × 150 + 300 = 600mm (comfortable but long)
The formula ensures the staircase feels natural and balanced.
How the Golden Rule Relates to UK Building Regulations
While the Golden Rule is a design guideline, UK Building Regulations (Part K) set the legal requirements for stairs.
Key rules include:
- Maximum rise: 220mm
- Minimum going: 220mm
- Maximum pitch: 42 degrees
- Minimum headroom: 2 metres
- Consistent rise and going throughout the flight
The Golden Rule helps you design stairs that not only feel right but also meet these legal standards.
Why Stair Comfort Is So Important
A staircase that follows the Golden Rule offers several benefits:
1. Natural Movement
Humans instinctively prefer stairs that match the natural stride of walking. The Golden Rule aligns with this rhythm.
2. Safety
Most stair accidents happen because of:
- Steep rises
- Shallow treads
- Inconsistent step sizes
The Golden Rule reduces these risks.
3. Accessibility
Children, elderly people, and those with mobility challenges find well‑designed stairs easier to use.
4. Aesthetic Appeal
Balanced proportions create a staircase that looks elegant and well‑designed.
Common Mistakes When Designing Stairs
Even with the Golden Rule, mistakes happen. Here are the most common issues:
1. Trying to Fit Too Many Steps Into a Small Space
This leads to steep, uncomfortable stairs that may fail building control.
2. Inconsistent Step Heights
Even a 5mm difference can cause trips.
3. Shallow Treads
These force users to place their feet sideways or walk awkwardly.
4. Ignoring Headroom
A staircase that meets the Golden Rule but fails headroom requirements will still be rejected.
5. Overly Deep Treads
These make stairs feel more like ramps and disrupt natural movement.
How to Apply the Golden Rule in Your Home
If you’re planning a staircase, follow these steps:
1. Measure the Total Floor‑to‑Floor Height
This determines how many risers you need.
2. Divide the Height by a Comfortable Rise
Aim for 170–190mm per step.
3. Calculate the Going
Use the Golden Rule to find the ideal going.
4. Check the Pitch
Ensure the angle is 42 degrees or less.
5. Confirm Headroom
You need at least 2 metres above the pitch line.
6. Review Building Regulations
Even perfect stairs must meet legal standards.
Examples of Stair Designs That Follow the Golden Rule
Standard Domestic Staircase
- Rise: 180mm
- Going: 250mm
- 2R + G = 610mm
- Comfortable and compliant
Compact Staircase
- Rise: 190mm
- Going: 220mm
- 2R + G = 600mm
- Suitable for tight spaces
Luxury Staircase
- Rise: 160mm
- Going: 300mm
- 2R + G = 620mm
- Gentle, elegant, and spacious
Does the Golden Rule Apply to Loft Conversions?
Yes—but with limitations.
Loft conversions often have restricted space, meaning:
- Steeper stairs
- Reduced headroom
- Limited floor area
While the Golden Rule still applies, you may need to work within tighter constraints. Many loft stairs use:
- A rise of 190–200mm
- A going of 220–230mm
As long as the pitch stays under 42 degrees and the stairs are safe, building control may accept a slightly steeper design.
Final Thoughts
The Golden Rule for stairs is a simple yet powerful guideline that ensures your staircase is safe, comfortable, and compliant. By balancing the rise and going using the formula 2R + G = 550–700mm, you create stairs that feel natural to climb and meet the expectations of modern building design.
Whether you’re renovating, extending, or building from scratch, understanding this rule early in your project can save you time, money, and stress.
Contact us today to discuss your staircase requirements or use our online staircase builder tool.
