Boat Storage Shed: How to Choose the Right Size

Buying a boat is exciting. Finding somewhere to store it properly? That’s another story.

Whether you’ve got a small fishing boat, a tinnie, or a larger recreational vessel, choosing the right boat storage shed can save you plenty of hassle down the track.

Too small, and you’ll struggle to fit your boat and trailer inside. Too large, and you could end up paying for space you don’t need.

The good news is that getting the size right doesn’t have to be complicated. Here’s what to measure, what to consider, and how to find boat shed solutions that work for your boat, your property, and your budget.

Why Does Boat Storage Shed Size Matter?

A boat shed does more than give you somewhere to park your vessel. It helps protect your investment from the elements while keeping your driveway, garage, or backyard free.

But size matters more than you might think.

Your shed needs enough room for the boat itself, the trailer, and any equipment that extends beyond the vessel. You’ll also want space to move around comfortably, access your gear, and carry out basic maintenance.

A properly sized boat storage shed can help you:

• Protect your boat: Keep it sheltered from harsh sunlight, rain, and changing weather conditions.
• Make storage easier: Avoid squeezing through tight spaces or struggling to reverse your trailer.
• Store accessories: Keep fishing rods, life jackets, batteries, and boating equipment together.
• Allow for maintenance: Give yourself room to clean, inspect, and prepare your boat.
• Plan for the future: Avoid outgrowing your shed if you upgrade your boat later.

How to Measure Your Boat for a Storage Shed

Before settling on your boat shed dimensions, grab a tape measure and take a few measurements.

One of the biggest mistakes boat owners make is measuring the boat without accounting for the trailer, motor, and other accessories.

Here’s what you need to check.

1. Measure the Total Length, Including the Trailer

Your boat’s advertised length isn’t necessarily the amount of storage space you’ll need.

The trailer drawbar, outboard motor, and any equipment extending beyond the hull can add considerable length.

Measure from the furthest point at the front of the trailer to the furthest point at the rear, with everything in its normal storage position.

For example, a 5-metre boat might have an overall trailered length of 6.5 metres or more, depending on the setup.
You’ll also want extra space at the front and back so you’re not parking right against the walls.

2. Check the Widest Point

Next, measure the overall width of your boat and trailer.

Don’t forget to account for:

• Trailer mudguards and wheels
• Side rails or accessories
• Boat covers and fittings
• Any equipment extending beyond the hull

You’ll need additional room on either side to walk around the boat, secure the trailer, and access your equipment.

If you’re planning to use the shed for other storage, allow extra width for shelving, tools, or a workbench.

3. Measure the Maximum Height

Height is especially important when choosing a boat shed.
A boat sitting on its trailer can be much taller than you expect, particularly if it has a canopy, windscreen, T-top, or other accessories.

Measure from the ground to the highest point of the boat in its normal towing or storage configuration.

If you have a foldable canopy or removable equipment, decide whether you’ll store it folded down or upright.

Important: Your shed’s overall height isn’t the same as its usable door opening height. Always check the actual door clearance before ordering.

What Size Shed Do You Need for a Boat?

There’s no single boat storage shed size that suits every vessel. The right dimensions depend on your boat’s overall measurements, trailer configuration, and how you plan to use the space.

However, the following guide can help you get started.

Boat Type	What to Consider
Small tinnie or compact fishing boat	Check the full trailered length, plus the height of the motor and any canopy.
Medium fishing or recreational boat	Allow room to walk around the boat and trailer, plus space for gear.
Larger trailer boat	Check door width, door height, and the turning space outside the shed.
Large boat with additional equipment storage	Consider a custom design with extra length and space for equipment.

These are general prompts, not fit recommendations. Best Sheds can customise a shed to any size you like. Measure your complete boat and trailer setup, including the motor, and confirm the usable internal dimensions and door opening before selecting a shed.

For example, if your boat and trailer measure 7 metres long, a shed comfortably longer than that might be workable for basic storage. A longer shed could make even more sense if you want room to move around the trailer or store extra equipment.

The key is to choose a shed based on how you’ll actually use it, rather than simply selecting the smallest size your boat can fit into.

Not sure where to start? Best Sheds offers customisable options, so you can request a shed quote based on your boat’s measurements and storage requirements.

How Much Extra Clearance Should You Allow?

Your boat might technically fit inside a shed, but that doesn’t mean it’ll be practical to use.

Think about the space you’ll need every time you take your boat out or put it away.

As an initial planning guide, consider allowing:

• Length: Around 0.5 to 1 metre of additional space at each end, where practical.
• Width: Around 0.5 to 1 metre on each side for comfortable access.
• Height: Additional clearance above the highest point of your boat, particularly at the entrance.

These are general planning allowances rather than fixed requirements. Your ideal clearance will depend on your trailer, access needs, door configuration, and whether you’ll be working inside the shed.

For example, if you’re storing a boat that you regularly take out on weekends, having enough room to reverse in comfortably can make a huge difference.

A little extra space now could save you a lot of frustration later.

Don’t Forget About Your Boat Shed Door

You could have the perfect shed dimensions and still run into problems if the door is too narrow or too low.

When choosing your boat storage shed, pay particular attention to the entrance.

• Door Width

Your shed door needs to accommodate the widest point of your boat and trailer, with additional clearance to allow for reversing and manoeuvring.

A wider opening can be especially helpful if your driveway is narrow or you’re approaching the shed at an angle.

• Door Height

Check the actual clear opening height, not just the shed’s wall or eave height.

Roller door mechanisms and other structural components can affect the available clearance.

If your boat has a tall canopy, windscreen, or fixed accessories, this is particularly important.

• Door Position

Think about how you’ll approach the shed from your driveway or yard.

A well-positioned door can make parking significantly easier, especially if you’re reversing a long trailer.

Before finalising your design, consider the turning space outside the shed and whether you’ll have a clear path in and out.

Should You Choose a Standard or Custom Boat Storage Shed?

A standard shed can be a practical option if your boat and trailer fit comfortably within its dimensions.

But not every boat has the same storage requirements.

Larger boats, tall canopies, unusual trailer configurations, and properties with limited space may benefit from a custom design.

With a custom boat storage shed, you can plan around:

• The length and width of your boat and trailer
• Your required door opening height
• Extra bays for vehicles or equipment
• Additional room for tools and accessories
• The available space on your property

Best Sheds offers customisable steel sheds, giving you flexibility when choosing the dimensions and layout.

If you’re unsure whether a standard design will work, our shed buying guide is a useful place to start.

Other Things to Consider Before Buying a Boat Shed

Getting the dimensions right is important, but there are a few other factors worth thinking about before you buy.

• Ventilation and Moisture

Boats are regularly exposed to water, and moisture can become a problem when they’re stored in enclosed spaces.

Good ventilation helps reduce trapped humidity and encourages damp surfaces to dry.

Depending on your shed design, ventilation options may include vents or other suitable airflow solutions.

It’s also important to clean and dry your boat properly before long-term storage, particularly after saltwater use.

• Your Property and Available Space

Before choosing a shed, measure the area where you plan to install it.

Consider your property boundaries, driveway access, ground slope, drainage, and nearby structures.

You’ll also need to allow enough space outside the shed to manoeuvre your boat trailer safely.

For more guidance, read our custom shed buying checklist.

• Council Approval

Depending on your location, shed dimensions, and property conditions, you may need council approval.

Requirements vary between local councils and Australian states, so it’s worth checking before committing to a design.

Our council approvals and restrictions guide can help you understand what to investigate.

• Future Storage Needs

Are you planning to upgrade your boat in a few years? Would you like to store a jet ski, trailer, or other equipment alongside it?

It’s worth thinking ahead.

A slightly larger shed could provide greater flexibility, particularly if you want to avoid needing another storage structure later.

Of course, bigger isn’t always better. The goal is to find the right balance between usable space, available land, and your budget.

Common Boat Shed Sizing Mistakes to Avoid

Before you settle on a design, watch out for these common mistakes.

• Only measuring the boat hull: Always include the trailer, motor, and any accessories that extend beyond the boat.
• Forgetting about door clearance: A shed might be tall enough internally, but the entrance could still be too low.
• Choosing the smallest possible footprint: Leaving no room around the boat can make storage and maintenance difficult.
• Ignoring access outside the shed: Make sure you have enough space to reverse, turn, and line up your trailer.
• Not planning for additional equipment: Fishing gear, batteries, covers, and tools all take up room.

Taking a little extra time to plan your shed dimensions can help you avoid costly changes later.

Find the Right Boat Storage Shed With Best Sheds

Your boat deserves somewhere safe, practical, and convenient to store it.

Whether you’re looking for a compact shed for your fishing boat or a larger structure with extra room for equipment, the right design starts with accurate measurements and a clear idea of how you’ll use the space.

At Best Sheds, we offer customisable steel shed solutions to suit a range of storage needs.

Not sure which size is right for you? We’re here to help you work through your options.

Get a free boat shed quote today and take the first step towards a storage solution that fits your boat and your property.

Frequently Asked Questions

What size shed do I need for a 5-metre boat?

A 5-metre boat may need a shed considerably longer than 5 metres once the trailer drawbar and outboard motor are included. Allowing extra length at each end is a useful starting point for most setups, but you should measure the complete boat and trailer before choosing your dimensions.

How tall should a boat storage shed be?

The ideal height depends on your boat’s maximum height when it’s sitting on its trailer. Measure any canopies, windscreens, or fixed accessories, then allow suitable clearance. Make sure the roller door’s usable opening height is sufficient, not just the shed’s overall height.

Can I customise the size of my boat shed?

Yes. Best Sheds offers customisable shed designs, allowing you to plan dimensions and features around your boat, trailer, and available property space. You can request a quote to discuss your requirements.

Is a 6m x 9m shed big enough for a boat?

A 6m x 9m shed may suit many smaller and medium-sized trailer boats, depending on their overall dimensions. Best Sheds can also customise a shed to any size you like. You’ll need to check the complete trailered length, width, height, and available door clearance to confirm whether it will fit comfortably.

Do I need council approval for a boat storage shed?

You may need council approval depending on your shed’s size, location, and local planning rules. Requirements vary, so check with your local council before proceeding.

Is it better to store a boat in a fully enclosed shed?

A fully enclosed shed can offer additional protection from sunlight, rain, and wind-blown debris compared with uncovered outdoor storage. However, adequate ventilation, drainage, and regular maintenance remain important, particularly for boats used in saltwater.