Do I need a permit for a shed? Possibly. The answer depends on your location, the shed’s dimensions, where you place it, and how you intend to use it.
There is no single shed size that is permit-free everywhere in the United States. Even when a project is exempt from a building permit, other requirements may still apply.
Before buying materials or preparing the ground, give your local building or planning office the details of your proposed shed. Getting a clear answer at that stage is much easier than changing a partly completed project.
This guide explains what to ask and how to prepare for that conversation.
This article contains affiliate links. If you purchase through them, we may earn a commission at no additional cost to you.
Comparing shed designs? Explore My Shed Plans. Once you shortlist a design, check its dimensions, use, and construction details with your local authority before committing to the build.
A Building Permit Exemption Is Not Complete Project Approval
The word “permit” can refer to different approvals.
When someone says that a small shed does not need a permit, ask which permit they mean and what conditions apply.
Depending on the property and project, questions may involve:
| Topic | What to ask |
|---|---|
| Building permit | Does this structure require a building permit? |
| Planning or zoning | Is the proposed location, size, height, and use allowed? |
| Electrical work | Does the planned wiring require a separate permit? |
| Plumbing or mechanical work | What approvals apply to these installations? |
| Site work | Are there requirements for grading, drainage, trees, or other site changes? |
| Private restrictions | Does an HOA, lease, or recorded property restriction require separate approval? |
Ask about the complete project rather than only whether its floor area falls below a threshold.
Why Shed Size Alone Does Not Give You the Answer
Size is often part of the permit question, but it may not be the only condition.
Height, number of stories, attachment to another building, location, and intended use can also matter.
Even the way area is measured can differ.
For example, Seattle’s official shed guidance identifies a roof-footprint limit of 120 square feet as one of several conditions for its permit exemption. Portland’s accessory-structure guidance uses a 200-square-foot threshold measured from the interior of exterior walls and also addresses height and use.
Those are local examples, not national rules. Neither figure should be applied to your property without checking the full requirements for your jurisdiction.
Ask How Dimensions Are Measured
When contacting the office, ask:
- Is area measured at the floor, exterior walls, interior walls, or roof?
- Are roof overhangs included?
- How is building height measured?
- Do lofts or additional levels affect the classification?
- Does an attached structure follow different rules?
A shed advertised as “10 × 12” does not answer all those questions.
Use the actual drawings, including roof projections and height.
Start With the Correct Local Office
Find the authority responsible for the property address.
That may be a city, town, county, or another local jurisdiction. A nearby city’s guidance may not apply to a property outside its boundary.
Search the official government website for terms such as:
- Shed permits.
- Accessory structures.
- Detached accessory buildings.
- Residential outbuildings.
If you are unsure which office handles the project, contact the local building or planning department with the address and ask.
Use supplier guidance as supporting information, but confirm the requirements with the responsible authority.
Prepare a Short Project Description
You can ask preliminary questions before buying a plan. However, you will receive a more useful answer if you provide specific information.
Prepare the following:
| Information | What to provide |
|---|---|
| Property | Address and parcel information, if available |
| Proposed use | For example, garden-tool storage |
| Dimensions | Width, length, height, and roof projections |
| Construction | Timber, metal, resin, or another specified system |
| Position | Detached or attached, with proposed distances from boundaries and buildings |
| Foundation | The proposed support arrangement |
| Services | Any planned electricity, plumbing, heating, or cooling |
| Site work | Relevant excavation, grading, or other changes |
| Supplier or plan | Model details or drawings, if selected |
Describe the intended use accurately. A storage building and a room intended for regular occupation may raise different questions.
Check Where the Shed Can Be Placed
Do not assume that a shed can stand anywhere simply because it is small.
Ask the planning or zoning office about the proposed position, including:
- Required distances from property boundaries.
- Separation from other buildings.
- Permitted yard locations.
- Height limits.
- Limits on building coverage.
- Any property-specific restrictions.
Confirm how measurements are taken. A rule measured to the wall may differ from one involving a roof projection.
Also establish the actual property boundary. A fence or hedge is not a reliable substitute when the boundary is uncertain.
Before preparing the site, read our guide to how to prepare ground for a shed.
Explain the Intended Use
Tell the office what will happen inside the building.
Useful descriptions include:
- Storage for garden tools and a mower.
- Bicycle and household storage.
- A hobby workspace.
- A home office.
- A space with plumbing.
- A building intended for sleeping or living.
Avoid describing a planned occupied room as simple storage to obtain an answer that does not match the project.
If you expect to change the use later, ask what that would involve before choosing the design.
A shed that suits garden storage should not automatically be treated as suitable for another purpose.
Mention Electrical and Other Services Separately
If you plan to install wiring, plumbing, or heating and cooling equipment, include that in the initial inquiry.
Do not assume that an exemption for the building also covers those installations.
Ask which trade approvals are required, who may carry out the work, and when inspections must occur.
For example, Seattle publishes separate electrical-permit guidance for installing or altering wiring. The correct process for your property must be confirmed locally.
Planning these services early can also affect the construction sequence and budget.
Does the Foundation Change the Permit Question?
Provide the proposed foundation details, but do not assume that using blocks, skids, or gravel makes the project exempt.
Ask how the authority treats the complete structure.
Terms such as “portable,” “temporary,” or “movable” in product advertising do not establish the local classification.
Our shed foundation options guide explains the main support approaches. The selected foundation still needs to suit the building and applicable requirements.
Found a design you like? View My Shed Plans, then check whether the chosen drawings provide the information your local office needs. Purchasing plans does not itself provide permission to build.
What Documents Might You Need?
Ask for the current application checklist for your project.
Depending on the authority and proposal, requested information may include:
- An application form.
- A site plan showing the proposed location.
- Dimensioned building drawings.
- Foundation and connection details.
- Product or manufacturer information.
- Project-specific design documentation.
- Other information identified during review.
Do not assume a downloadable plan package contains every document needed for your property.
A site plan, for example, must describe the actual location and surroundings.
Our guide to shed plans for beginners will help you assess the information available before buying.
Questions to Ask Before You Start
Take this checklist to the building or planning office:
- Does this exact shed require a building permit?
- If it is exempt, what conditions must it meet?
- Is separate zoning or location approval required?
- How are area and height measured?
- Where may the shed be placed on this property?
- What foundation and anchoring information is required?
- Do the planned services need separate permits?
- What documents must be submitted?
- What fees apply?
- Which inspections are required, and at what stages?
- When may site preparation and construction begin?
- Are there deadlines or conditions attached to the approval?
Keep written guidance, application references, and approved drawings together.
If you change the size, location, design, or use, ask whether the earlier answer or approval still applies.
Who Handles the Permit When You Buy an Installed Shed?
Confirm this in the contract.
Ask the supplier:
- Do you prepare the application?
- Who submits it?
- Are fees included?
- Do you provide the required drawings?
- Who schedules inspections?
- What remains the owner’s responsibility?
- Will installation wait until the required approvals are in place?
“Installation included” does not, by itself, answer those questions.
Our build vs. buy a shed guide compares the responsibilities involved in a build from plans, a kit, and an installed building.
Include Fees and Review Time in Your Plan
Obtain current fees and processing information from the responsible office.
Avoid relying on a national average or a timeline from another homeowner’s project. The required review and documentation may differ.
Include applicable fees and any necessary design assistance in your shed-building budget.
When scheduling deliveries, distinguish between submitting an application and receiving permission to begin.
What If the Shed Is Already Built?
Contact the responsible office and explain the existing structure accurately.
Provide its dimensions, location, use, and any available drawings or purchase records. Ask how to establish its status and what steps are required.
Do not assume that a previous owner obtained approval or that a long-standing structure is automatically exempt.
The appropriate next step depends on the property and local process.
Common Questions About Shed Permits
Do I need a permit for an 8 × 10 shed?
You cannot determine that from the advertised dimensions alone. Check the local area measurement, height, location, use, and other exemption conditions.
Can I build a 10 × 12 shed without a permit?
Possibly in some jurisdictions, but there is no universal answer. A 10 × 12 footprint is 120 square feet, yet roof projections or a different measurement method may affect the local calculation.
Does a prefab shed need a permit?
Buying a prefabricated building does not automatically remove permit requirements. Provide its specifications and proposed location to the local authority.
Does a shed on skids need a permit?
Ask the local office. Skids alone do not establish that the structure is exempt.
Is HOA approval the same as a building permit?
No. Treat private approval and government requirements as separate checks. Ask what each requires for the project.
Can a shed supplier guarantee that no permit is needed?
Ask for the basis of the statement and confirm it with the responsible local office using your property address and project details.
Should I buy the shed before checking?
It is better to confirm the requirements before making a nonrefundable purchase, preparing the foundation, or committing to installation.
Get the Answer for Your Actual Project
The most useful permit question includes the property, dimensions, proposed location, foundation, and intended use.
Gather that information, contact the correct office, and keep the response with your project records. Once the requirements are clear, you can choose materials and schedule the work with fewer uncertainties.
Visit Beginner Shed Guide for more help organizing your first project.
Ready to shortlist a design? Explore My Shed Plans, review the available samples, and confirm the local requirements for your preferred shed before construction.
Resources
- Seattle: Sheds — An official example of local shed-permit conditions.
- Portland: Garages, Sheds, and Accessory Structures — Local guidance covering permits, zoning, drawings, and related requirements.
- Seattle: Electrical Permits — An example of separate trade-permit guidance.
- Your local building and planning departments — The appropriate starting point for requirements at your property.
Affiliate disclosure: We may earn a commission from purchases made through affiliate links on this page, at no additional cost to you.
Permit and building disclaimer: This article provides general US planning information, not a determination of legal requirements for a particular property. Local examples are illustrative and may change. Confirm current requirements with the responsible authority before purchasing, preparing the site, or building.