Choosing the wrong shed can leave your yard with a tight, unusable box. Use the practical measurements and layout rules below to match your needs to the right kit or custom build.
Quick summary
- Start with goals: List what you will store and how you will use the space. That makes it easier to pick the right footprint, door type and internal layout from the outset.
- Measure the site: Map the usable footprint, note obstacles and access paths, and mark corners so delivery and installation fit on arrival. Measure gates and paths to ensure trucks can reach the site and to plan placement.
- Allow buffer space: Add about 20–30% extra floor area to account for door swings, aisles and bench access. This keeps the shed practical as you add shelving or future equipment.
- Check local rules: Verify permits, setbacks and height limits early, since council thresholds often affect size and design choices. Factor approvals and neighbour notifications into your timeline.
- Choose material: Steel is usually best for durability and low maintenance, but timber and polymer have their places depending on appearance and insulation needs. Include base, delivery and installation costs when comparing options.
Start with your storage goals and use cases
Think about how you will use the shed before you worry about size or finish. A garden shed for a mower and hand tools has very different needs from a backyard shed for bikes and bins, a single-car garage, a workshop or a farm machinery bay. Being clear about the core use saves time and prevents costly changes later.
Measure the largest item first, then build the layout around it. Note length, width and height of the biggest piece, such as a lawn tractor, trailer or car, and how you will access it through the door. Below are practical internal footprints and typical uses to guide your choice.
- 2×2 m suits a compact bike rack, lawn tools and a small garden trolley. Use this size in tight corners or as a dedicated tool nook.
- 2.8×2.8 m fits a small mower and shelving along one wall. It also accommodates two bikes and bins with narrow aisles.
- 3×3 m works for a ride-on mower or a small workshop bench with storage. Expect basic circulation and a single standard door.
- 6×3 m functions as a single-car garage or a workshop with room for a vehicle plus a workbench and cabinets. This footprint gives space for tools and on-floor storage as well.
Factor in clearance for doors, open tool lids and walking aisles. Allow a minimum 900–1,000 mm for a clear aisle next to benches and include door width plus swing area in your measurements.
With those basics measured and a practical buffer in place, you can compare layouts and door types more intelligently. Next, measure your site to confirm the usable footprint, access and any obstacles that will affect placement.
Measure your site: footprint, access and clearance for your shed
Start by mapping the usable footprint on the ground. Walk the proposed location and mark boundaries with tape, pegs or spray paint, then measure width and depth with a tape measure. Note fixed obstacles such as eaves, overhanging branches, retaining walls and slope so nothing surprises you on build day. Make a quick sketch on paper or your phone showing dimensions and obstacle locations; a simple rectangle with arrows for setbacks is enough for planning.
Check vertical clearance for everything that will enter the shed, including cars, vans, caravans, tractors and trailers. Measure the tallest item from ground to highest point and add a safety margin of 150 to 300 mm to allow for roof racks, roller doors and any roof-mounted gear. Roller doors and caravan annexes often need extra room for operation and maintenance access, and metal roofs require clearance for flashing and guttering.
Plan delivery and on-site access before you order. Measure gate width, driveway angle and the turning circle so trucks, trailers or cranes can reach the site. If gates are tight or crossfalls steep, offload by crane or a specialist truck may be necessary.
Check for low powerlines and enclosed courtyards, and talk to your shed supplier early so they can quote delivery options and crane lifts if needed. If a crane or wide truck cannot access the site, installation costs and timelines change quickly. Prepare the base and drainage so the shed sits level and stays dry; typical bases include compacted crushed rock, concrete slabs or engineered pads, so pick one that suits your chosen material and council requirements.
Once site access and clearance are confirmed, check local rules, permits and setback requirements so you know which footprint and height are allowable for your block. Doing this early prevents surprises when you order materials or book installation.
Check local rules: permits, setbacks and height limits
Small builds can be deceptive; many councils trigger a permit at surprisingly low sizes. Typical thresholds to watch include: Victoria 10 m² or height greater than 3 m, New South Wales 20 m² in residential areas and 50 m² in rural zones, Queensland 10 m² or height over 2.4 m, Western Australia 10 m² or 2.4 m height, South Australia 15 m² and Tasmania 18 m². Confirm with your council before you order materials or book installation.
Setbacks and easements often reduce the space you thought you had for a building. Boundary setback rules, proximity to stormwater or sewer easements, and overshadowing limits for neighbouring properties all affect your usable footprint and may force an alternate placement or a smaller building. Councils may require neighbour notification or party wall agreements when you are close to a shared boundary, so factor that into your timeline and design choices.
Good suppliers simplify permits by supplying permit-ready documentation. Ask for these items up front:
- Scaled site and elevation plans that show the proposed building on your block with setbacks, finished floor level and ridge height. These help assess compliance with council rules and neighbour sightlines.
- Engineering certificate that details frame strength, anchor points and load ratings. This document is often required for building approvals and insurance.
- Compliance notes and connection details that cover fixings, bracing and services connections. These notes speed up approvals and clarify installer responsibilities.
Shed City offers permit and design support to deliver plan-ready kits or turnkey installations without repeated council back-and-forth. Shed City coordinates engineering, produces submit-ready drawings and helps finalise material and base choices once permits are approved. For additional guidance on approvals and next steps, see this essential guide to shed council approvals and check practical permit size thresholds such as what size shed can I build without a permit. For supplier-side planning and further reading, visit our Resources & Shed Buying Guides.
Choose the right material: steel, timber or polymer
For garages and heavy-use workshops, steel is the best performing material for durability and security. It offers a long service life, low maintenance and strong theft resistance, and metal panels speed up installation so your space is usable sooner. There are trade-offs: untreated areas can rust, panels may dent, and coatings plus ventilation matter to avoid condensation. Consider Colorbond finishes for improved corrosion resistance and compare coatings and gauge rather than price alone.
Timber and polymer each suit different needs. Timber works well where appearance and insulation matter, for example a studio or garden room, but it requires regular painting or staining and can be vulnerable to termites unless treated. Polymer or resin lockers resist rot and need almost no maintenance, though they are usually smaller, less secure and can fade or warp in strong sun.
Match material to size and function: choose steel for vehicle storage, workshops and heavy machinery that need security and longevity. Pick timber when you want insulation and a finished interior with character, and choose polymer for light, budget storage where security and size are not critical. Make sure the chosen material meets any engineering requirements on your permit and factor exposure, ventilation and expected lifespan into the decision. For a direct comparison of metal and wood options, see this metal vs wood shed comparison.
With material chosen, factor these decisions into your budget so base, delivery and installation estimates reflect the complete build. Confirm base type, delivery options and installation method before finalising your quote.
Budget properly: shed price, delivery, base and installation
When buying a shed, get the full numbers on the table before you fall in love with a design. Typical price bands help set realistic expectations: small metal or polymer units about $400–$1,200; standard metal 2×2 m to 3×3 m $415–$1300; mid-range resin $1,200–$2,500; timber kits $1,800–$6,500 for small-to-medium builds; and large custom buildings from around $7,000 to $12,000 plus depending on finishes. These ranges cover common builds, but finishes and site access change the math fast.
Delivery, site preparation and installation add costs and often surprise buyers who only quote the shell. Delivery fees depend on distance, placement and access and can range from a few tens to several hundred dollars. Concrete slabs or engineered pads usually start around $980 and can climb to $3,000 or more for reinforced footings. Professional assembly ranges from several hundred for simple kits to a few thousand for full installs, and factor extra for painted finishes, Colorbond cladding upgrades and higher-grade fasteners.
Watch for hidden extras and ask the right questions when comparing suppliers. Get written, itemised quotes that list the kit & delivery, and other estimates to obtain include slab or levelling, backyard placement, electrical rough-in, lead time, and any engineering certification. Ask whether the quote includes council documentation or permits, and obtain two to three written quotes to compare assumptions and exclusions.
With a clear budget you avoid last-minute add-ons and can prioritise finishes. Confirm site preparation and foundation choices with your supplier so the quote matches the ground you will build on.
Finalise shed dimensions and visualise in 3D before you buy
Before you order, lock the footprint and preview the layout in 3D so the finished building fits your life. Mapping your items and checking site access early prevents costly changes on delivery day and keeps the project on budget. Use the six-point checklist below to finalise dimensions and clearances, and tick each item on site before you request quotes so measurements are reliable and consistent.
- Measure the largest items you plan to store, including vehicles and trailers. Record length, width and height and note where doors, ramps or tow bars affect clearances.
- Mark the proposed footprint on site with pegs or paint to confirm real-world fit. Walk around the marked area to check access, turning space and interaction with gardens or services.
- Confirm door width, internal clearances and any overhead obstructions. Check roller door operation and allowance for door swings or tracks.
- Check council setbacks, easements and permit requirements for your block. Factor any neighbour notifications or consent timelines into your schedule.
- Choose your preferred material and base type, and note base level or concrete needs. Record whether the base needs reinforcing for vehicle use or machinery loads.
- Add a growth buffer: allow about 20–30 percent extra for future gear or layout changes. That buffer keeps the shed usable as needs change over time.
Design Your Shed makes testing sizes and layouts fast and visual. Change widths, heights, door types and colours, then export plans to share with council or chosen suppliers to validate decisions before ordering a kit or booking a full build. View real examples and inspiration in the Shed Gallery: Real Builds & 3D Designs. When you ask for quotes, include the exported 3D plan or a simple sketch, desired materials, base type, site access notes and whether you want assembly. Send the same brief to two or three suppliers, including factory-direct manufacturers and dealers, and check on current specials with Shed City so you can compare pricing and lead times and budget realistically for base, delivery and installation so there are no surprises.
Picking the right size is mainly about mapping your stuff, measuring the site and confirming clearances and permits. Use the checklist, try the 3D builder, then visualise and compare options before ordering so you get a shed that fits your life, not just your lawn.
Make your shed choice with confidence
Choose a size that fits the job and the site, not what looks nice in a brochure. Start with storage goals so you know whether you need a mower nook or a full workshop, walk the location to map the usable footprint and access, and leave space for doors and manoeuvring. Measure your site and check local rules before you order to avoid costly changes later, and balance material, base and installation costs in your budget.
