Site Plan Requirements in Colorado – Everything You Need to Know

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Introduction

If you’re planning a pool, ADU, addition, shed, or any construction project in Colorado, the local building department will require a site plan. A proper site plan helps you avoid delays, meet zoning rules, and secure fast permit approval.

At USA Site Plans, we prepare accurate, affordable, permit-ready site plans for every city and county in Colorado.

What Is a Site Plan in Colorado?

A site plan is a scaled drawing showing:

  • Property boundaries

  • Existing structures

  • Proposed construction

  • Setbacks

  • Utilities

  • Driveways & access

  • Drainage

Cities like Denver, Aurora, Colorado Springs, Boulder, Fort Collins, Lakewood, Thornton, Arvada, and Pueblo all require site plans for residential permits.

Colorado Site Plan Requirements

1. Property Information

  • Address

  • Parcel number (APN)

  • Lot size

  • North arrow & drawing scale

2. Lot Boundaries

  • Exact property lines

  • Easements

  • Right-of-way areas

3. Existing Structures

  • Home footprint

  • Garage, shed, barn

  • Driveway

  • Patio, deck

  • Well/septic (if applicable)

4. Proposed Project Details

Required for pools, sheds, ADUs, additions, garages, pergolas, and more:

  • Size

  • Dimensions

  • Distance to property lines

  • Labeling (e.g., “Proposed 12×20 Shed”)

5. Setbacks

Typical Colorado zoning setbacks:

  • Front: 20–25 ft

  • Side: 5–10 ft

  • Rear: 15–25 ft

(Setbacks vary; USA Site Plans checks your city/county.)

6. Utilities

  • Sewer or septic location

  • Water line

  • Gas line

  • Electrical box

  • Stormwater flow arrows

7. Topography (if required)

Some counties — especially mountain areas — require:

  • Contours

  • Slope percentage

  • Retaining wall notes

  • Drainage adjustments

8. Driveways & Access

Includes:

  • Width

  • Location

  • Connection to the road

  • Parking layout (for ADUs)

9. Tree/Environmental Requirements

Required in Boulder, Aspen, Summit County, and some mountain towns.

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Colorado Counties With Special Requirements

Denver

  • Impervious surface calculations

  • Utility disconnection notes

Colorado Springs

  • Floodplain checks

  • Fire department access requirements

Boulder County

  • Wildfire mitigation

  • Topographic slope maps

  • Tree protection plans

Jefferson County

  • Grading plan if slope is 15% or more

  • Erosion control details

Mountain Counties (Eagle, Summit, Pitkin)

  • Snow shed diagrams

  • Geologic hazard review

  • Steep-slope site analysis

USA Site Plans prepares all required elements for each county.

When Do You Need a Site Plan in Colorado?

A site plan is required for:

  • Swimming pool permits

  • ADUs & guest houses

  • Home additions

  • Detached garages

  • Sheds (over 120 sq ft in many cities)

  • Pergolas and patio covers

  • Fences (in some jurisdictions)

  • Decks

  • Driveway expansions

If you’re unsure — assume the city will request a site plan.

Why Choose USA Site Plans?

✔ 24–48 Hour Turnaround

✔ Accurate, compliant, and accepted by all Colorado counties

✔ Affordable: $99 – $159

✔ Perfect for pools, sheds, garages, additions, ADUs

✔ Delivered in permit-ready PDF

✔ Free revisions included

✔ No site visit required

What We Need From You

To start your Colorado site plan:

  • Property address

  • City/county

  • What you are building

  • Simple sketch, photo, or description

  • Optional: survey, previous plans

We take care of the rest — fast and professionally.

Conclusion

Colorado requires a clear, accurate site plan for nearly every residential construction permit. Whether you’re installing a pool in Denver, building an ADU in Colorado Springs, or adding a shed in Boulder, USA Site Plans delivers fast, affordable, and permit-ready site plans tailored to your local requirements.

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✔ ORDER YOUR COLORADO SITE PLAN

Link to services:
https://www.usasiteplans.com/services/