#carport

This is an illustration of a modern, medium-sized front yard driveway.

Here is an illustration of a sizable, diverse, drought-tolerant, and summertime full-sun backyard concrete paver vegetable garden landscape.

Cantilever carports—famed for their sleek, single-sided post design and suspended roofs—are becoming incredibly popular across Melbourne. They offer a minimalist aesthetic and maximize driveway space, making them perfect for modern Australian homes.

However, before you order your premium cantilever carport kits or hire a builder, you must address the golden question: Do I need council approval?

In Melbourne, navigating the intersection of Building Permits and Planning Permits can be tricky. Here is what you need to know to stay compliant.

1. The Two Types of Approvals You Must Know

In Victoria (including all Melbourne metropolitan councils like Monash, Boroondara, or Casey), there are two distinct types of approvals. You may need one, both, or neither.

Building Permit: This focuses on safety, structural integrity, and compliance with the Building Code of Australia (BCA). It is issued by a registered Building Surveyor (private or municipal).

Planning Permit: This focuses on land use, aesthetics, neighborhood character, and environmental impact. It is issued directly by your local municipal council.

2. When Do You Need a Building Permit?

In Victoria, minor structures like carports can sometimes be exempt from a building permit. However, cantilever carport have unique structural demands.

Generally, a carport is exempt from a building permit only if it meets all of the following criteria:

The floor area is less than $10\text{ m}^2$.

It is no more than 3 meters in height.

It is constructed of approved lightweight materials.

It is appurtenant (attached or associated) to a house.

💡 The Cantilever Exception: Because cantilever carports rely on a single side of heavy-duty posts and deep concrete footings to counter the weight of the suspended roof, most standard cantilever carports exceed $10\text{ m}^2$ or require engineering sign-offs. Therefore, a Building Permit is almost always required.

3. When Do You Need a Planning Permit?

Planning permits depend entirely on your specific local council’s planning scheme and your property's zones/overlays. You will usually need a Planning Permit if:

Front Setbacks: You plan to build the carport in your front setback (the space between the front of your house and the street). Melbourne councils are notoriously strict about keeping streetscapes open.

Overlays: Your property is subject to specific council overlays, such as a Heritage Overlay (HO), Significant Landscape Overlay (SLO), or Wildfire Management Overlay (WMO).

Small Lots: Your property land size is under $300\text{ m}^2$ or $500\text{ m}^2$ (depending on the specific council scheme).

4. Key Design Regulations to Keep in Mind (ResCode)

If your carport requires approval, it will be assessed against Victoria's ResCode standards. Key metrics include:

Height: The maximum height is typically 3.6 meters if built on a boundary, or an average of 3.2 meters.

Boundary Walls: If the cantilever posts are placed directly on a property boundary line, the total length of the structure (or combined with existing boundary walls) usually cannot exceed 9 meters or 25% of the boundary length.

Overlooking and Overshadowing: The roof cannot significantly block the daylight of a neighbor’s north-facing window or overshadow their private open space.

Summary Checklist for Melbourne Homeowners

To ensure your cantilever carport project goes smoothly, follow this step-by-step approach:

StepActionWhy it matters

1. Get a Copy of Your Title

Check for any easements or restrictive covenants on your land.You cannot build a permanent cantilever footing over a council easement without special consent.

2. Contact Local Council / Surveyor

Ask if your specific zone or overlays require a Planning Permit.Skipping this can result in heavy fines and forced demolition.

3. Obtain Engineering Computations

Ensure your cantilever manufacturer provides certified engineering drawings.Structural safety is paramount due to wind uplift forces on suspended roofs.

4. Apply for Permits

Submit drawings, site plans, and engineering to your Building Surveyor.Ensures your structure is legally compliant and fully insured.

An illustration of a sizable, modern, detached two-car carport design

Most carport companies make you call before they show you a price. Metal America is the only one in the United States that publishes real prices by zip code and lets you check out online. Here are all 11 standard models ranked by price.

Ozborne, $1,600 to $3,100. 12 by 20 single car. Best seller.

Fall Phoenix, $1,800 to $3,300. 18 by 20 two compact cars.

Motley Cruiser, $1,900 to $3,400. 20 by 20 two mid-size cars. Best dollar-per-square-foot deal.

Metallica America, $2,500 to $4,000. 20 by 20 two cars upgraded.

Van Haven, $3,000 to $4,500. 24 by 20 full-size trucks.

Slim Shady, $3,200 to $4,700. 20 by 25 extra length for trailers.

Heartbreaker, $3,300 to $4,800. 20 by 25 upgraded trim.

Tin Man, $3,500 to $5,000. 20 by 20 8-foot clearance for lifted trucks.

Freedom Fighter, $3,700 to $5,200. 30 by 25 three vehicles.

The Undertaker, $3,800 to $5,300. 20 by 20 premium build.

Journeyman, $4,500 to $6,000. 24 by 25 flagship.

Every model ships with free delivery, free professional installation, 14-gauge galvanized steel framing standard (12-gauge upgrade with 20-year rust warranty), three roof styles, rent-to-own financing with no credit check, and a 48-hour refund guarantee. Lead time 2 to 4 weeks.

Hot take. Most carport companies still operate like it is 2005, folks. They have you on the phone explaining your situation while a salesperson taps numbers into a custom quote tool. Then they call back with a price. Then they upcharge you on delivery. Then they upcharge you on install.

Metal America cuts all that. Eleven standard models. Published prices. Online checkout in 20 minutes.

A standard double carport should be at least 6 meters (20 feet) wide, 5.5 to 6 meters (18 to 20 feet) deep, and offer a clear height of around 2.3 to 2.5 meters (7.5 to 8 feet). These dimensions allow two mid-sized cars to park side by side, with enough space to open doors fully and walk between the vehicles comfortably.

This is the minimum I would personally recommend. Over time, I’ve seen people try to save space, only to find themselves constantly bumping into doors, mirrors, or posts. A double carport should not just hold two cars, but offer enough maneuvering space to be usable in everyday life.

If you want to store larger vehicles like SUVs, pickups, or include shelving or bikes, I suggest planning more generously from the start.

What Size Do You Really Need?

Depending on Vehicle Types

Choosing the right size depends heavily on what types of vehicles you drive and how you plan to use the space. Below are some practical size recommendations based on real-world use:

Two compact or small cars: Minimum size: 5.5 m x 5.5 m (18 x 18 ft) This can be sufficient if both cars are compact and you don’t need much room for anything else.

One SUV and one compact car or two sedans: Recommended size: 6 m x 5.5 m (20 x 18 ft) This layout offers enough space for daily parking without stress.

Two SUVs or pickups: Ideal size: 6.5 m x 6 m (21 x 20 ft) Anything smaller will make getting in and out a hassle.

Campervans or vehicles with roof boxes: Make sure to increase the height to at least 2.7 m (9 ft).

Extra storage needs (bikes, trash bins, tools): Add at least 0.5 m to 1 m (2 to 3 ft) in width or depth depending on where the storage is placed.

Allow for Extra Space If…

You want to install wall-mounted shelving or storage cabinets

You plan to build side walls or close off the carport later

You need to open wide car doors (especially on electric or luxury vehicles)

You want to future-proof the design for larger cars

Tip: Even if your current cars fit snugly in a tight carport, consider sizing up slightly. Vehicles are getting wider, and you may end up with a larger model down the road.

Minimum vs. Comfortable Dimensions

A good rule of thumb is to plan not just for parking, but for daily usability. Here’s a table that shows different use cases and suggested sizes: Use Case Minimum Size Comfortable Size 2 Compact Cars 5.5 m x 5.5 m / 18 x 18 ft 6 m x 6 m / 20 x 20 ft 2 Sedans or SUV + Car 6 m x 5.5 m / 20 x 18 ft 6.5 m x 6 m / 21 x 20 ft 2 SUVs or Pickups 6.5 m x 6 m / 21 x 20 ft 7 m x 6.5 m / 23 x 21 ft With Additional Storage Add 0.5–1 m / 2–3 ft extra Add 1–1.5 m / 3–5 ft extra

These numbers reflect practical experience. I’ve planned carports for clients where they ended up needing more room for outdoor gear, kids’ bikes, or even just easier access. A little more space now avoids frustration later.

Roof Types and Height Considerations

The type of roof you choose affects both the look and the functionality of your carport. It also plays a role in how high the structure needs to be.

Common Roof Options:

Flat Roof: Clean and modern look, easier to build, but may require more drainage planning.

Pitched or Gabled Roof: Traditional, with better snow load capacity and ventilation.

Arched Roof: Visually appealing, ideal for freestanding carports.

Standard Height Requirements:

General use (most cars): 2.3 to 2.5 meters (7.5 to 8 feet) is sufficient.

Higher clearance for vans, trucks, or roof racks: Go for 2.7 to 3 meters (9 to 10 feet) to be safe.

Wanting to install lighting or ceiling storage: Increase the height accordingly.

Tip: Think ahead to what you may add in the future. Installing lighting, solar panels, or even enclosing the space later can be easier if the carport is slightly higher from the start.

Other Planning Considerations

Building a double carport is more than just choosing dimensions. Here are important factors to consider during planning:

Location and Orientation

Ensure the carport fits well with your driveway layout

Position it to allow smooth entry and exit without tight turns

Consider sun exposure, especially if the roof will include solar panels

Legal Requirements

Always check local regulations and required distances to property lines

Depending on your region, permits or inspections may be required

Height limits or materials may be restricted in some neighborhoods

Design and Usability

Decide early between freestanding or attached

Think about adding side panels for protection from wind or rain

Match the carport’s style with your home for better curb appeal

Environmental and Structural Factors

Plan for proper water drainage from the roof

If you live in a snow-prone region, choose a pitched roof

In windy areas, ensure proper anchoring and wind resistance

Size Matters – But So Does Use