Everyone underestimates how much space they need in a shed. Then half of them overcompensate and buy something too big for their block.

Here’s how to figure out what you actually need, what it’ll cost, and what matters vs. what’s just marketing.

What Are You Using It For

Start with honest assessment of what you’re storing or doing in the shed.

General storage: Tools, lawn equipment, bikes, boxes of stuff. Most common use.

Workshop: Actually working on projects, needs workbench space and room to move.

Garage: Parking vehicles plus some storage.

Hobby space: Woodworking, metalwork, car restoration, whatever your thing is.

Different uses need different features. A storage shed doesn’t need the same setup as a workshop.

Size Reality Check

Common shed sizes in Brisbane:

3m x 3m: Minimal storage. Lawn mower, some tools, not much else. Gets full fast.

3m x 6m: Decent storage or small workshop. Most popular size for suburban blocks.

6m x 6m: Proper workshop or storage for serious amount of stuff. Good if you’ve got the space.

6m x 9m or larger: Farm shed territory. Most suburban blocks can’t fit this legally.

General rule: You’ll fill whatever size you get. Buy bigger than you think you need if budget and space allow.

Measure what you’re planning to store. Add 30% for working space and future accumulation. That’s your minimum size.

Steel vs. Timber

Steel sheds:

Pros: Don’t rot, termite-proof, low maintenance, faster to erect, generally cheaper.

Cons: Hot as hell in Brisbane summer without insulation, can rust if coating damaged, look industrial.

Best for: Storage, budget-conscious buyers, termite-prone areas.

Timber sheds:

Pros: Better insulated naturally, easier to customize, looks better, more comfortable to work in.

Cons: Needs termite treatment, requires maintenance (painting/staining), more expensive, slower to build.

Best for: Workshops, hobby spaces, when appearance matters.

Reality: Most people in Brisbane get steel because it’s cheaper and low-maintenance. Timber is nicer but requires more upkeep in our climate.

Kit Sheds vs. Custom Built

Kit sheds (Bunnings, Stratco, etc.):

Pros: Cheaper, readily available, standardized sizes, DIY-friendly.

Cons: Limited customization, quality varies, might not fit your space perfectly.

Cost: $2,000-8,000 depending on size and features.

Custom built:

Pros: Exactly what you want, better quality materials possible, professional installation, designed for your specific site.

Cons: Expensive, longer lead time, requires finding reliable builder.

Cost: $8,000-25,000+ depending on size and specifications.

Most people get kit sheds. Custom makes sense if you’ve got difficult site conditions or specific requirements.

Foundation Requirements

You can’t just plop a shed on dirt and hope for the best.

Concrete slab: Best option. Level, permanent, prevents moisture and pest issues. Expensive though ($2,000-5,000 for typical shed size).

Concrete piers: Cheaper than full slab. Raised floor keeps timber off ground. Works for smaller sheds. ($800-1,500)

Gravel base: Budget option. Needs proper preparation and drainage. Only for small storage sheds.

Brisbane’s clay soil and drainage issues mean proper foundation matters. Cheap out here and you’ll regret it.

Cyclone and Wind Rating

Brisbane gets severe storms. Your shed needs to be properly rated and anchored.

Most residential areas need cyclone rating C1 or C2. Check your specific location with council.

Proper anchoring to foundation is essential. I’ve seen sheds end up blocks away after storms because someone didn’t bolt them down properly.

Don’t skip this. It’s not optional.

Ventilation and Insulation

Metal sheds in Brisbane summer are brutal without proper ventilation.

Ventilation options:

• Whirlybirds on roof
• Louvers in walls
• Ridge vents
• Doors left open (not secure though)

Minimum: Get whirlybirds. They’re cheap and help significantly.

Insulation:

• Roof insulation is most important (heat rises)
• Wall insulation helps but less critical
• Cost: $500-2,000 depending on shed size

If you’re working in the shed during summer, insulation is worth the money. For pure storage, maybe skip it.

Door Options

Roller doors: Convenient for vehicle access, more expensive, require clearance in front.

Sliding doors: Good for workshops, cheaper than roller, need clearance to slide.

Hinged doors: Cheapest option, fine for small sheds, need swing clearance.

For workshops, I prefer sliding doors. For garages, roller doors are more convenient.

Get wider doors than you think you need. Squeezing large items through narrow doors is frustrating.

Council Permits

Brisbane council requires permits for most sheds, but there are exemptions.

Generally exempt (no permit needed):

• Under 10m² floor area
• More than 1m from all boundaries
• Under 2.4m high
• Not a habitable building

Needs permit:

• Anything over 10m²
• Closer than 1m to boundaries
• Over 2.4m high
• On sloping sites

Check Brisbane City Council’s website or call them. Exemptions have specific conditions.

I’ll do a detailed post on permits next because it’s confusing and important.

Budget Reality

Basic steel kit shed (3x3m): $2,000-3,000 including DIY installation

Mid-range steel shed (3x6m): $4,000-6,000 plus $1,500-3,000 for concrete slab

Quality steel shed (6x6m): $7,000-10,000 plus $3,000-5,000 for slab and installation

Custom timber shed (3x6m): $12,000-18,000 fully installed

Add costs for:

• Concrete foundation
• Professional installation (if not DIY)
• Electrical work ($1,500-3,000 for basic power)
• Insulation and extras

Total project cost is usually 50-100% more than just the shed kit price.

DIY vs. Professional Installation

DIY kit sheds:

Pros: Save $1,500-3,000 on labour. Satisfaction of doing it yourself.

Cons: Takes time (weekend to full week), requires tools and skills, your problem if something goes wrong.

Reality: If you’re handy and have a mate to help, most kit sheds are doable. Larger sheds (6x6m+) are challenging for DIY.

Professional installation:

Pros: Done properly, faster, guaranteed work, they deal with problems.

Cons: Costs more, need to schedule and wait for them.

I’d recommend professional for anything over 6x6m or if you’ve got difficult site conditions.

Common Mistakes

Buying too small: Everyone does this. Go bigger if budget allows.

Skipping foundation: Proper base is essential in Brisbane. Don’t cheap out.

Ignoring access: Make sure you can get the shed materials to your backyard. Some sites are difficult.

No ventilation: Metal sheds need it in Brisbane.

Wrong location on block: Consider sun exposure, access, drainage, and council setback requirements.

What Actually Matters

Size: Get it right. Too small is useless.

Foundation: Essential for longevity and function.

Proper anchoring: Brisbane weather demands it.

Adequate doors: Access matters more than you think.

What Doesn’t Matter Much

Brand names: Most steel sheds are similar quality regardless of brand.

Fancy colors: Standard Colorbond is fine. Premium colors cost more and don’t perform better.

Expensive locks: Basic security is adequate for most suburban sheds. Expensive locks don’t stop determined thieves.

Next Steps

Figure out your actual needs. Measure your stuff. Check your available space and council setbacks.

Get quotes from several suppliers. Compare total project cost, not just shed price.

Don’t rush. A shed is a long-term investment. Take time to get it right.

Next post I’ll cover Brisbane council permits in detail - what you need, how to get them, what the actual rules are.

After that, workshop setup guide for people wanting to make their shed functional for actual work.

For Brisbane-specific building regulations, check Brisbane City Council’s building requirements. Their website is confusing but it’s the official source.