For homeowners, the first pricing question is whether the building department needs only a site placement exhibit or a complete construction drawing package. Both may be called “plans” in casual conversations, but their scope and cost differ substantially.

Common residential site-plan situations

Fence and small shed

A basic plan can identify a proposed fence or shed on the parcel and show lengths, setbacks, existing structures and access when applicable. An eligible basic plot plan can start at $99. Structural designs for anchorage, engineered slabs or unusual site conditions are separate.

Pool, spa or deck

Pool and deck site plans generally start around $199 for eligible placement scopes. A pool project can additionally require barriers, equipment, electrical bonding, plumbing and structural drawings. A raised deck can additionally require beams, joists, footings, ledger connections, guard/stair details and uplift provisions. These are not included in a site-plan-only quote.

Garage and home addition

A detached garage or room addition may need both a site plan and building plans showing dimensions, elevations, roof and foundation details. The project may also involve electrical, mechanical, structural or energy information. Confirm whether the purchase covers just the site layout or the full permit package.

Larger additions and garage projects may require a full permit drawing set with architectural, structural and other required plans.

Accessory dwelling unit (ADU)

ADUs commonly raise issues of access, utilities, building separation, zoning and parking where applicable. Site-plan drafting for eligible ADU scopes can start around $299, but full ADU architectural, structural and MEP documentation costs more and varies by property and jurisdiction.

For accessory dwelling unit projects, explore our ADU site plans to understand the drawing scope and permit requirements.

What does the homeowner provide?

When will I need a survey?

The answer depends on the property, permit type and reviewing authority. A parcel map is not a certified boundary survey. Some simple applications can use existing reliable property documentation; other applications require a licensed land surveyor to confirm property lines, improvements or site elevations.

Learn when existing property records may be sufficient and when a licensed survey is needed in our site plan without a property survey guide.

What should the written estimate clarify?

Review the residential site-plan service or compare costs in the 2026 site-plan pricing guide. To request a quote, provide a marked survey or sketch plus your project dimensions.