Whether you're developing a commercial property, building a custom home, or preparing for a permit, the site plan is one of the first and most important steps in your project.
But how long does it actually take to complete?
The short answer:
Anywhere from 1 to 6 weeks, depending on project complexity, local requirements, and how fast your team moves.
In this post, RSP Engineers explains the key factors that influence site plan timelines—and how to speed things up without cutting corners.
What Is a Site Plan?
A site plan is a scaled drawing that shows how your property will be developed. It includes:
Building placement
Driveways and parking
Drainage and grading
Utilities
Easements and setbacks
Landscape and hardscape
ADA and fire access (for commercial projects)
It’s often required for zoning, building permits, and site development approvals.
Typical Timelines by Project Type
For simple residential projects—such as a new house on a flat lot—a basic site plan may take 1 to 2 weeks, assuming a recent survey is available.
For residential projects in sloped areas, flood zones, or those requiring stormwater design, timelines often extend to 2 to 4 weeks.
Commercial developments, which involve larger sites, utility planning, and stricter code requirements, typically need 3 to 6 weeks or more—especially if multiple agencies must review the plan.
What Affects Site Plan Timing?
1. Project Complexity
A simple home addition on a flat lot is faster than a commercial build on a sloped site with utility relocations.
2. Local Jurisdiction Requirements
Some municipalities require more detailed documentation or multiple rounds of review. Knowing these requirements in advance saves time.
3. Survey Availability
The site plan must be based on an accurate land survey. Delays often come from waiting for this foundational data.
4. Stormwater and Drainage Design
If your site requires stormwater plans, grading modifications, or erosion control, this adds steps—but it’s critical for approval.
5. Client Response Time
Quick feedback on layout options, design revisions, or permitting questions can speed things up dramatically.
6. Engineer Workload and Responsiveness
Working with a proactive, well-staffed civil engineering company like RSP Engineers can shave days—or weeks—off your timeline.
How to Speed Up the Site Plan Process
Start early: Get your engineer involved as soon as you have concept plans or a property in mind.
Hire experienced professionals: Look for licensed civil engineers with local permitting experience.
Have a recent survey ready: A current boundary/topo survey helps avoid delays.
Respond quickly: Timely feedback helps keep the design and permitting process moving forward.
Bundle services: Firms like RSP Engineers can handle site layout, grading, drainage, and permitting all under one roof.
RSP Engineers: Fast, Accurate, Permit-Ready Site Plans
At RSP Engineers, we specialize in delivering fast, code-compliant site plans for residential and commercial projects. With decades of experience across land development, utility design, stormwater planning, and permitting—we help you avoid delays and move forward with confidence.
Whether you're an architect, developer, or homeowner, we’ll help you understand exactly how long your site plan will take—and how to make the process smooth from day one.
