Victorian Building Footing Regulations: What You Need to Know

Building footings in Victoria are governed by a framework of Australian Standards, the National Construction Code, and state-level building regulations. Whether you're a builder, owner-builder, or homeowner planning a project, understanding these requirements is essential to avoid costly mistakes, failed inspections, and potential legal issues. This guide breaks down the key regulations in plain language.

Australian Standard AS 2870: Residential Slabs and Footings

AS 2870 is the primary Australian Standard governing the design of residential footings and slabs. It sets out requirements for:

• Site classification based on soil reactivity and bearing capacity
• Footing depth and design requirements for each soil class
• Performance criteria that footings must meet under expected soil movement
• Requirements for site drainage and moisture management around footings

AS 2870 applies to all residential buildings in Victoria, regardless of the footing type used. Both concrete and concrete-free footing systems must demonstrate compliance with this standard.

Victorian Soil Classification System

Before any footing can be designed, a geotechnical soil test must classify the site. The classification determines how much the soil will move with moisture changes, which directly affects footing design. The classes used in Victoria are:

The more reactive the soil, the deeper and more robust the footing system needs to be. Class P sites always require specific engineering assessment.

Building Permit Requirements for Footings

In Victoria, most building work involving footings requires a building permit before construction can begin. This includes:

• New homes and residential buildings
• Extensions and additions
• Deck construction (most elevated decks)
• Restumping and relevelling
• Sheds and outbuildings over certain size thresholds

Some minor works may be exempt from requiring a permit — for example, small garden sheds or very low-level decks. However, the thresholds vary by council, so always check with your local council or a registered building surveyor before assuming an exemption applies.

You can obtain a building permit through either your local council or a private building surveyor. The surveyor reviews your plans, engineering, and specifications, issues the permit, and inspects the work at key stages including footing installation.

Engineer Certification Requirements

For most residential footing work in Victoria, a structural engineer must:

• Review the soil test report and confirm the site classification.
• Design the footing system — specifying type, size, depth, spacing, and load capacity for each footing position.
• Certify compliance — issuing a certificate confirming the footing design meets AS 2870 and the National Construction Code.

Standard soil classes (A through H2) can often use deemed-to-satisfy footing solutions from AS 2870. Class P and E sites, or non-standard designs, require specific engineering calculations.

Do Concrete-Free Footings Meet Victorian Regulations?

Yes. Concrete-free footing systems from BMSA Footing Solutions — including RapidStump, StumpRite, and SurePile — are fully engineered products that comply with Australian building standards. Here's how:

• Each installation is designed by a qualified structural engineer based on the specific site's soil classification and load requirements.
• The products are manufactured to consistent specifications and tested to verify load capacity.
• Engineering certification is provided for every project, confirming compliance with AS 2870 and the NCC.
• Building surveyors inspect and approve concrete-free footing installations the same way they do concrete footings.

There is no regulatory distinction between concrete and concrete-free footings in Victoria — the requirement is that the footing system must be engineered to meet the performance criteria for the site. The material is a design choice, not a regulatory barrier.

Common Compliance Mistakes

These are the most frequent compliance issues we see on Victorian building sites:

• No soil test — Building footings without a soil test means the design is guesswork. This is a compliance failure and a structural risk.
• Wrong footing depth — Footings not deep enough for the soil class will not perform correctly, especially on reactive clay sites.
• No engineer sign-off — Using generic footing designs without site-specific engineering certification.
• Building without a permit — Starting work before the building permit is issued can result in stop-work orders, fines, and required demolition.
• Skipping inspections — Not calling for a footing inspection before covering them with the structure means the building surveyor can't verify compliance.

Steps to Ensure Your Footings Are Compliant

1. Get a soil test — Engage a geotechnical engineer to classify your site before any footing design begins.
2. Engage a structural engineer — Have your footings designed and certified by a qualified structural engineer.
3. Use certified products — Whether concrete or concrete-free, ensure the footing system has appropriate product certification and engineering documentation.
4. Obtain a building permit — Apply through your council or a private building surveyor before work starts.
5. Call for inspections — Notify your building surveyor at the required inspection stages, especially the footing inspection before building over them.
6. Keep records — Retain all soil test reports, engineering certificates, and inspection records. You'll need them for the certificate of occupancy and any future property transactions.