What is AS2021?

AS 2021:2015 is the Australian Standard titled “Acoustics – Aircraft noise intrusion – Building siting and construction”. It provides guidance on how to manage aircraft noise exposure for buildings located near airports, using noise contour maps known as ANEF zones (Australian Noise Exposure Forecasts).

The goal of AS2021 is to minimize the impact of aircraft noise intrusion on residential, educational, commercial, and health buildings by recommending suitable land uses and construction techniques based on predicted noise exposure levels.

Why is AS2021 Important?

With the growing population and increased air travel, many developments are now proposed in areas affected by aircraft noise. AS2021 compliance ensures that new buildings are designed to provide appropriate internal acoustic comfort and avoid long-term noise complaints.

Councils, planners, and developers rely on this standard to determine if a proposed development is suitable for a given site — and what acoustic treatments may be needed to meet the standard.

What Are ANEF Zones?

ANEF (Australian Noise Exposure Forecast) zones are contour maps that represent average aircraft noise exposure levels over time. These contours are used in AS2021 to determine:

• Whether land use is compatible with expected aircraft noise levels
• What acoustic insulation may be required
• How building siting and construction must be adapted

Typically, areas within the 20–25 ANEF contour or higher require additional consideration for sound insulation and construction standards.

Who Needs to Comply with AS2021?

AS2021 affects anyone planning a building development near an airport, especially within mapped ANEF zones. This includes:

• Residential developers
• Architects and urban planners
• Educational and health facility builders
• Commercial and industrial site developers

Councils may require an acoustic assessment report demonstrating AS2021 compliance before approving a Development Application (DA).

How is AS2021 Compliance Achieved?

Compliance with AS2021 is achieved by performing an aircraft noise assessment and applying recommended design and construction methods to reduce internal noise levels.

This includes:

• Reviewing ANEF noise contours for the site
• Calculating expected indoor noise levels
• Specifying sound-rated windows, walls, roofs, and ventilation
• Providing documentation for council submission

Need Help With AS2021 Compliance?

At Enviro Corp, we specialise in Aircraft Acoustic Services with a strong focus on AS2021-compliant acoustic reporting and consulting.

Our expert team works with developers, architects, and councils across Australia to assess aircraft noise impacts and design buildings that meet the standard.

✔ Fast turnaround
✔ Council-ready reports
✔ Certified acoustic consultants

📞 Contact us today to get started or learn more about working in ANEF-affected areas.