In most parts of the US, the maximum size you can build without a permit is 120 square feet (e.g., a 10 ×12 foot footprint). Some generous jurisdictions allow up to 200 square feet, while in the UK, the limit typically permits buildings up to 15 to 25 square meters depending on roof type and garden availability.
When does a shed require a building permit? There are exceptions, but most cities/counties require a building permit for any shed larger than 120 square feet, and any building with electrical.
Maximum typical size without planning permission: around 15m² floor area. If within 2m of a boundary, the shed should be no higher than 2.5m. All outbuildings together should not cover more than 50% of your garden. Use must be incidental to the main house (storage, hobbies, workshop, office).
A 10x12 shed provides about 120 square feet of storage or workspace, though the usable area can vary slightly based on wall framing and measurements. This size is ideal for storing lawn equipment, tools, or even creating a small getaway space without overwhelming your yard.
Sheds should be single storey with a maximum eaves' height of 2.5m. Sheds should be a maximum of three metres high unless they have either an apex or dual-pitched roof, in which case they can be up to four metres high. There should be no raised platforms, balconies, or verandas on sheds.
The main guidelines for shed height compliance are as follows: Distance from boundaries - any shed taller than 2.5 metres (8 feet 2 inches) should be placed at least 2 metres from the boundary line. Smaller sheds can be positioned closer, but they should still consider the impact on neighbouring properties.
Perhaps you believe the building inspector made a mistake. Your best option is to appeal to the Board of Zoning Appeals. Appeals involving denial of a building permit are common.
So, do sheds add property value? It depends. If categorized as real property, it may increase your tax burden, particularly if it is large or resembles a cabin shed with a porch or lofted barn shed. On the other hand, if it remains personal property, it is typically exempt from direct taxation.
Buying a pre-fabricated shed is generally cheaper and more efficient than building one from scratch, with quality pre-built models costing roughly $2,000–$5,000. While DIY can save on labor, it often costs more in materials, tools, and potential mistakes, whereas kits or pre-built options offer better durability and guaranteed, lower total costs.
If you want the exact specs for the outer walls, a 10×10 shed is going to give you exactly 100 sq ft. However, a 10×12 shed will give you closer to 100 sq ft of space on the inside because of the thickness of the walls.
Do you need planning permission for a brick shed? You won't usually need planning permission to build a brick shed unless your home is a protected building. If you are unsure, it's always best to check with your local council before committing to the build.
Planning Permission
Property Size and Layout: Larger properties can typically support more sheds, but the available space must allow for proper placement while meeting setback requirements. For instance, a half-acre lot may accommodate multiple sheds, while a smaller urban lot might be limited to one due to space constraints.
The “Detached Living Unit” Issue. Adding a shower or toilet can reclassify your she shed as a detached living unit. That means it's treated more like a small home than an outbuilding. This change can affect how close it can sit to your house or whether you can even have plumbing in it.
5 common mistakes to avoid when building a shed
A 200 sq. ft. shed usually measures 10' x 20' (the size of a single-car garage). It provides plenty of space to store a riding mower, multiple ATVs, patio furniture, and about 250 medium-sized boxes.
100 feet is equal to about 6 to 7 car lengths.
If you're looking for the best possible price, the winter or early spring is a great time to buy. However, if you need the building right away, you may want to consider buying it during the summer or fall.
Yes, a shed can increase your property value by 1% to 2%, but only if it is well-maintained, permanently built on a solid foundation, and aesthetically matches the main house. Basic utility sheds provide practical use, while fully finished, insulated, and powered structures can add even more.
To effectively waterproof a shed, start by securing the roof with high-quality felt or liquid rubber and wrapping the walls in a breathable house membrane. Next, seal all gaps around windows, doors, and the base with exterior caulk. Finally, apply a penetrating waterproof sealer to exterior wood.
The "Hobby-Loss Rules" state that if an activity, either a business or investment, generates a profit in 3 out of 5 consecutive years the IRS will assume that you are engaged in the activity with the intent to make a profit. The IRS can however, question the validity of the specific expenses you are claiming.
The most overlooked tax break depends on your situation, but the Saver’s Credit (Retirement Savings Contributions Credit) and out-of-pocket charitable/medical expenses consistently top the list. These breaks reduce your tax bill dollar-for-dollar without requiring you to itemize.
If your shed is a permanent building, then it will be considered a capital asset, an improvement to your home. That means you will have to deduct a portion of the cost each year over a period of time, which is a type of tax break known as depreciation.