Choosing a shed size sounds simple until you’re standing in your backyard trying to figure out if a 10×16 will actually fit without crowding out the kids’ swing set, blocking the view from the patio, or running into a setback violation you didn’t know about.
It’s one of the most common questions we get from Maryland homeowners — and one of the most important ones to get right. Order too small and you’ll be cramming things in and wishing you’d sized up within a year. Order too large and you’ll lose yard space you actually wanted to keep, potentially run into permit requirements, or struggle to find a level spot to place it.
This guide walks through every popular shed size, what each one realistically fits, how to measure your specific Maryland backyard, and how local factors like lot size, setbacks, and county permit thresholds should shape your decision.
Start Here: How to Think About Shed Sizing in Maryland
Before diving into specific sizes, there are a few Maryland-specific realities worth understanding.
Suburban lots in central Maryland are smaller than you think. The average parcel in Anne Arundel County is 0.197 acres, with most lot sizes falling between 0.058 and 0.464 acres. County Office That’s roughly 8,600 square feet on average — and your usable backyard is a fraction of that after accounting for the house footprint, driveway, and front yard. Homeowners in Severna Park, Glen Burnie, Pasadena, Millersville, and Columbia are often working with less space than they initially assume.
Setbacks eat into your available space. Even if you have a 50×40 backyard, you can’t fill it wall-to-wall with a shed. Most residential areas require sheds to be 5 to 10 feet away from property lines, with front setbacks typically requiring 10 to 20 feet of clearance. Patiowell Outdoor Livings In Anne Arundel County, setback distances vary by zoning district and must be confirmed with the county’s zoning office before you place your order.
Permit thresholds affect what size makes sense. In Anne Arundel County, sheds under 150 sq. ft. don’t require a building permit (though setback rules still apply). In Howard County, the threshold is 200 sq. ft. In Montgomery County, every shed requires a permit regardless of size. Knowing your county’s threshold before you size your shed can save you time, money, and paperwork. See our full Maryland Shed Permit Guide for a complete county-by-county breakdown.
The most common regret is going too small. Most people find that when they start off with a smaller shed, they end up regretting it and eventually upgrade to a larger size anyway. Alan’s Factory Outlet If you’re torn between two sizes, the larger one is almost always the right call.
How to Measure Your Maryland Backyard for a Shed
Before you pick a size, spend 20 minutes in your backyard with a tape measure. Here’s the process:
Step 1: Identify your usable zone. Walk the perimeter of your backyard and identify where a shed could realistically go — flat ground, clear of trees, accessible for delivery, and away from utilities and drainage paths. In Maryland, you also need to avoid the Critical Area if your property is within 1,000 feet of the Chesapeake Bay or a tributary stream.
Step 2: Measure the space. Measure the length and width of your potential shed location. Leave 2 to 3 feet of clearance around the shed for maintenance access, and avoid placing sheds too close to fences, trees, or drainage paths. DuraStor Structures
Step 3: Account for setbacks. Subtract your county’s required setback distances from your property lines. What’s left is your maximum buildable footprint. In most Anne Arundel County residential zones, you’ll need to pull back at least 5 feet from any property line — check with the zoning office for your specific district.
Step 4: Mark it out in the yard. Use string, stakes, or spray paint to mark out the dimensions of the shed you’re considering. Morgan Buildings Stand back. Walk around it. Look at it from the patio and from the back of the yard. This simple step prevents a lot of “it looked smaller on the website” surprises.
Step 5: Factor in door clearance. Make sure there’s enough space in front of the doors to actually open them fully and maneuver equipment in and out — a riding mower needs real turning room, and double doors need clearance to swing open completely.
Every Common Shed Size, Explained
8×8 (64 sq. ft.) — The Compact Solution
At 64 square feet, an 8×8 shed provides the perfect amount of additional storage in a small backyard. This shed size works well for storing tools, garden supplies, bikes, and more. Colorado Shed Company
Best for: Small urban or townhouse yards, tool and garden storage, secondary storage alongside an existing shed or garage.
What fits: Push mower, hand tools, garden supplies, seasonal décor, bins and bags, bikes (2–3), small patio furniture.
What doesn’t fit: Riding mowers, large lawn tractors, kayaks, motorcycles, workshop setups.
Maryland permit status: Falls under the 150 sq. ft. threshold in Anne Arundel, Howard, Carroll, and Prince George’s counties — no building permit required (setbacks still apply). Under the 120 sq. ft. threshold in Baltimore County — permit required.
Our take: A good fit for townhouse backyards and tight suburban lots in areas like Linthicum, Brooklyn Park, or Odenton where space is genuinely limited. If you have more yard than that, you’ll likely outgrow an 8×8 within a couple of years.
8×10 (80 sq. ft.) — The Starter Shed
A small step up from the 8×8, the 8×10 adds just enough room to make single-use storage genuinely comfortable.
Best for: Garden tool storage, seasonal equipment, small suburban backyards.
What fits: Push mower, full array of garden and hand tools, snowblower, bikes, seasonal bins, potting bench.
What doesn’t fit: Riding mowers, large power equipment, workshop setup.
Maryland permit status: Under threshold in most Maryland counties. Baltimore County threshold is 120 sq. ft. — still exempt.
Our take: A solid choice for Pasadena, Millersville, and Severna Park homeowners with moderate backyards who just need organized, dry storage for lawn and garden gear.
10×12 (120 sq. ft.) — The Most Popular All-Around Size
The 10×12 is one of the most popular shed sizes. You can do a lot with a 10×12 shed, including storing larger recreation items like an average-sized kayak. You could also finish the space for a backyard studio, home office, or hobby nook. Patiowell Outdoor Livings
Best for: Most Maryland suburban backyards. The sweet spot of capacity and footprint.
What fits: Push mower or compact riding mower, full tool storage, kayak or canoe, bikes, snowblower, shelving, small workbench, seasonal storage.
What doesn’t fit: Large riding tractors with decks over 50 inches, multiple vehicles, full workshop.
Maryland permit status: Under the 150 sq. ft. threshold in Anne Arundel, Carroll, and Prince George’s counties — no building permit. Exactly at the 120 sq. ft. threshold for Baltimore County — a permit is required. Under Howard County’s 200 sq. ft. threshold — no permit.
Our take: The 10×12 is what most central Maryland homeowners with a standard suburban lot actually need. It fits comfortably in most backyards, clears the setback requirements without dominating the yard, and stays under the permit threshold in most of the counties we serve. Browse our 10×12 shed options →
10×16 (160 sq. ft.) — The Step Up
When 10×12 isn’t quite enough, 10×16 adds 40 square feet of usable floor space without increasing the width — making it ideal for longer backyards where width is the constraint.
Best for: Homeowners who need tool storage plus a small work area, or who have two or more large items to store.
What fits: Riding mower (up to 48-inch deck), full tool wall, bikes, kayak, workbench, shelving, snowblower.
What doesn’t fit: Large workshops, vehicles, significant hobby space alongside full equipment storage.
Maryland permit status: Exceeds the 150 sq. ft. threshold in Anne Arundel, Carroll, and Prince George’s counties — a building permit is required. Under Howard County’s 200 sq. ft. threshold — no permit required.
Our take: A great size for Davidsonville, Gambrills, and Crofton homeowners with standard-to-larger lots who are outgrowing smaller storage. The extra 4 feet of length makes a significant real-world difference in what you can store and how you can access it.
12×16 (192 sq. ft.) — The Workhorse
A 12×16 shed gives you 192 square feet of floor space — about the size of a small bedroom. Alan’s Factory Outlet This is the most popular size among our customers across Anne Arundel and Howard counties who have a full-size yard and want a shed that will serve them for decades.
Best for: Full lawn equipment storage, active workshop setups, she-shed or hobby space, homeowners who want to avoid outgrowing their shed.
What fits: Full-size riding mower or lawn tractor, two bikes, snowblower, full tool storage, workbench, shelving, and still room to work comfortably.
What doesn’t fit: Vehicles, boats over 14 feet, complete home gym setups.
Maryland permit status: Exceeds 150 sq. ft. — requires a building permit in Anne Arundel, Carroll, and Prince George’s counties. Falls just under Howard County’s 200 sq. ft. threshold — no permit required in Howard County.
Our take: This is the size we recommend most often to Maryland homeowners with a standard suburban backyard. It’s large enough to be genuinely useful for years without requiring a massive footprint or jumping into the 200+ sq. ft. permit tier in most counties. See our 12×16 shed models →
12×20 (240 sq. ft.) — The Serious Storage Shed
At 240 square feet, the 12×20 crosses into serious territory — this is a shed that can handle almost anything a central Maryland homeowner would realistically need.
Best for: Large-lot homeowners, hobby workshops, multiple equipment storage, she-sheds with real living space, homeowners who want one shed that does everything.
What fits: Full lawn equipment including large tractors, multiple bikes and recreational gear, complete workshop, home office setup, or gym space.
Maryland permit status: Exceeds the 200 sq. ft. threshold — requires a building permit in Howard County, Anne Arundel County, and all other Maryland counties we serve. A permanent foundation (frost footings) is required for sheds over 400 sq. ft. in most counties, but not yet at this size.
Our take: Best suited for Davidsonville, Harwood, Lothian, or Gambrills homeowners with larger lots. At this size, you’re getting a structure that genuinely competes with a one-car garage for function and versatility. Browse 12×20 options →
12×24 and Larger — Garage Territory
Once you cross 12×24 (288 sq. ft.) and beyond, you’re getting into structures that blur the line between sheds and garages. These are excellent choices for:
- Boat and vehicle storage
- Two-car or large workshop setups
- Home-based business storage
- Properties in rural Carroll County, Harford County, or Washington County with larger lots
At this size, expect to pull a building permit in every Maryland county, and plan for a permanent foundation. If vehicle storage is your primary goal, it’s worth comparing a large shed to one of our one-car or two-car garage options, which are purpose-built for that use case.
Shed Size by Use Case: Quick Reference Guide
Not sure which size matches your actual needs? Here’s a quick guide based on how Maryland homeowners most commonly use their sheds:
| Primary Use | Recommended Size |
|---|---|
| Basic garden tool storage | 8×8 or 8×10 |
| Lawn gear + bikes + seasonal | 10×12 |
| Riding mower + full tool storage | 12×16 |
| Workshop or hobby space | 12×16 or 12×20 |
| She-shed or backyard office | 10×12 to 12×20 |
| Pool equipment + furniture | 10×12 or 10×16 |
| Multi-use: equipment + work area | 12×20 |
| Vehicle or boat storage | 12×24 or garage |
Maryland-Specific Sizing Considerations
A few factors unique to Maryland backyards are worth keeping in mind as you finalize your size:
Humidity and airflow. Maryland summers are hot and humid, which matters for shed sizing. A larger shed with better airflow is less prone to moisture buildup — a real concern if you’re storing power tools, wood, or anything rust-prone. If you’re going smaller, make sure your site has good drainage and air circulation.
Snow load. Anne Arundel County’s design ground snow load is 25 pounds per square foot. All of our Amish-built sheds are constructed to handle Maryland’s snow and wind requirements — but it’s worth knowing that larger sheds with proper framing handle winter weather more comfortably than lightweight kit sheds at any size.
Lot coverage limits. Anne Arundel County zoning rules limit the total floor area of accessory structures — your shed cannot exceed the floor area of your principal structure (your house). This isn’t a constraint for most homeowners, but if you have a small home on a large lot, it’s worth confirming before ordering a very large shed.
Critical Area properties. If your property is within 1,000 feet of the Chesapeake Bay or a tributary, different rules apply. A permit is required regardless of shed size, and placement restrictions are stricter. If your property is in the Critical Area, contact Anne Arundel County’s Department of Inspections & Permits before ordering.
The Size Mistake Most Maryland Homeowners Make
After working with customers across central Maryland for years, the single most consistent feedback we get is this: “I wish I’d gone bigger.”
It’s almost never the other way around. People rarely regret getting a 12×16 when they thought they only needed a 10×12. But they frequently regret the 10×12 when the riding mower makes it feel cramped, or when they realize they also want a workbench, or when the kayaks they bought the following spring have nowhere to live.
A final piece of advice: when in doubt, always buy a shed a little larger than you think you need. This helps you account for any items you didn’t factor into your measurements or items you may purchase in the future. Penn Dutch Structures
If you’re genuinely torn between two sizes, go with the larger one. The cost difference between adjacent sizes is usually modest — far less than the cost of replacing or adding a second shed two years later.
Frequently Asked Questions
What is the most popular shed size for Maryland suburban backyards?
The 10×12 and 12×16 are the most popular sizes for central Maryland homeowners. The 10×12 works well for standard suburban lots in areas like Severna Park, Pasadena, and Millersville. The 12×16 is the go-to for homeowners with a full-size backyard who want a shed that handles both storage and a small work area without requiring a massive footprint.
What size shed can I build without a permit in Anne Arundel County?
In Anne Arundel County, a one-story detached shed under 150 square feet and with an average height of no more than 10 feet does not require a building permit — unless it’s located in the Critical Area. Zoning setback rules still apply regardless of size. Common sizes that fall under this threshold include 8×8, 8×10, 10×12, and 10×14.
What size shed can I build without a permit in Howard County?
In Howard County, sheds under 200 square feet do not require a building permit. This means the popular 12×16 (192 sq. ft.) falls just under the threshold in Howard County. Sheds over 400 sq. ft. in Howard County require permanent frost footings.
How much clearance do I need around my shed?
You’ll want at least 2 to 3 feet around the items you’re storing for clearance, and about an extra foot of space around your shed for a foundation area. Angi Beyond that, your county’s setback rules dictate minimum distances from property lines — typically 5 to 10 feet in most Maryland residential zones. Always confirm your specific setback requirements with your county zoning office before delivery.
What size shed fits a riding mower?
A standard riding mower with a 42–46 inch deck typically needs a shed that is at least 10 feet wide with a door opening of at least 6 feet. A 10×12 or 12×16 with double doors is the most common choice. For larger lawn tractors (50+ inch decks), a 12×16 or 12×20 gives you comfortable access and room for additional storage alongside the mower.
Can I fit a shed and a playset in a typical Maryland backyard?
Yes — in most cases, with careful planning. The key is measuring your available space after accounting for setbacks, then checking whether both structures can coexist while leaving usable lawn space between them. Our team can help you think through the layout. We also offer playsets if you’re looking to add both in one project.
Ready to Find the Right Size for Your Yard?
The best way to figure out your ideal shed size is to use our free 3D Shed Builder — you can customize width, length, doors, windows, and style, then get a quote without picking up the phone.
Or, if you’d rather talk it through with someone who knows Maryland backyards, give us a call at 1-410-729-8747. We’re based right here in Millersville and we’re happy to help you think through sizing, placement, and what will actually work for your specific lot.
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Permit thresholds and setback requirements are subject to change. Always verify current rules with your local county permitting office before ordering.
