Granny Flats Without Building Consent: Key Points to Understand

Written By Sara Nazem

The Government has announced changes allowing certain granny flats to be built without a building consent. Below is a clear breakdown of what this means.

What Is Changing

  • Granny flats up to 70m²

  • Single-storey only

  • Must use simple, proven construction systems

  • Must be designed and built to comply with the New Zealand Building Code

  • Construction must be carried out or supervised by Licensed Building Practitioners (LBPs)

  • Intended for low-risk, straightforward dwellings

  • This is a consent exemption, not a removal of standards

What Still Applies

  • Full compliance with the New Zealand Building Code

    • Structure and stability

    • Fire safety and separation

    • Weathertightness and moisture control

    • Durability and habitability

  • District Plan rules still apply:

    • Height limits

    • Yard setbacks

    • Site coverage and density

    • Servicing and access

  • Engineering input may still be required depending on site and construction

  • Utility connections must comply with local authority requirements

  • Poor or undocumented work can lead to:

    • Insurance issues

    • Difficulty selling the property

    • Problems with future alterations or additions

Why This Matters for Homeowners

  • Potential to add:

    • Rental income

    • Housing for family members

    • Flexible living or work-from-home space

  • Reduced consent process places greater responsibility on the owner

  • No routine council inspections means:

    • Design errors may go unnoticed

    • Construction quality becomes critical

  • Early professional advice can avoid costly corrections later

How Studio Ren Can Help

  • Site feasibility assessments to confirm what is achievable

  • Planning and District Plan checks before design begins

  • Building Code–compliant granny flat design

  • Coordination of structural and services input where required

  • Clear documentation to protect future resale, insurance, and financing

  • Independent advice before committing to construction

Our Perspective

  • This change removes some procedural barriers, not technical ones

  • Well-designed, compliant granny flats will:

    • Perform better long term

    • Hold their value

    • Avoid legal and financial risk

  • Skipping consent should never mean skipping professional oversight

Considering a Granny Flat?

  • Want to know if your site qualifies?

  • Unsure how to proceed without risking compliance issues?

  • Looking for a clear, professional assessment before building?

Studio Ren can guide you through the process with clarity and confidence.
Get in touch to discuss your site or arrange a feasibility review.

Sara Nazem