Height Relaxations under UDCPR: Provisions for Architectural Features, Water Tanks & More

When planning a building, height restrictions are among the most important compliance parameters. However, the UDCPR 2020 offers specific relaxations for non-habitable and architectural elements, allowing more design flexibility without breaching regulations.

Let’s explore what structures are excluded from the height measurement and how you can utilize these provisions during design.

What is Building Height under UDCPR?

As per the Unified Development Control and Promotion Regulations, the height of a building is measured from the average ground level to the highest point of the building. However, certain features are exempted from this calculation, provided they meet defined criteria.

Relaxations in Building Height Measurement (As per Rule 26.6 of UDCPR):

1. Parapet Walls
   Parapet walls up to 1.2 meters in height, used around terraces or balconies for safety, are not included in the height of the building.

2. Water Tanks and Lift Rooms
   Structures like lift machine rooms and overhead water tanks are excluded from height calculations, as long as they are used solely for services and not for habitation.

3. Architectural Features
   Decorative domes, spires, ornamental towers, pergolas, and similar non-functional features are allowed beyond the permissible height. However, they should not be used as habitable space and typically must remain within 20% of the building height.

4. Solar Installations
   Solar panels and solar water heating systems placed on the terrace are excluded from building height and are even encouraged as part of green building initiatives.

5. Telecommunication and Lightning Protection Devices
   Antennas, flag poles, lightning arresters, and similar installations are also exempt, but placement may require clearance if the building lies within an aviation or sensitive defense zone.

6. Chimneys and Vents
   Chimneys for kitchens or industrial exhaust systems, as well as ventilation shafts, can exceed the building height but should comply with safety and zoning standards.

Key Considerations:

• These exemptions are strictly for non-habitable and service-related structures. Misusing these spaces for occupancy can lead to legal issues.

• Always verify with the local planning authority, as some municipal bodies may have additional restrictions or require structural certifications.

• Even if a structure is exempted from height, it must still adhere to setback and safety norms.

• If your project is near an airport, railway, or military installation, obtain the necessary NOCs for any extended height structures.

Conclusion:

Height relaxation provisions under UDCPR offer much-needed design freedom. From aesthetics to services, these exemptions can be used effectively—provided they are well-planned and not misused. Whether you're designing a high-rise or a compact housing scheme, understanding these rules ensures your plan stays compliant without compromising function or creativity.