Drainage Engineering FAQ

A drainage engineer designs systems to manage stormwater and prevent flooding on properties. This includes calculating water flow rates, designing retention/detention systems, creating grading plans, and ensuring compliance with local regulations. At StructureSmart, our Licensed Professional Engineers create sealed plans that get approved by building departments.

Most drainage projects in Florida require permits. This includes new construction with impervious surfaces (driveways, patios, pools), filling or grading that changes water flow patterns, French drain or swale installation, and connecting to municipal drainage systems. Even "minor" changes often need permits. We recommend a free consultation to determine your specific requirements.

We serve the entire state of Florida — all 67 counties. Our primary service area is South Florida, including Palm Beach County, Broward County, and Miami-Dade County. We also serve Martin, St. Lucie, Indian River, Okeechobee, Hendry, and Collier counties as secondary areas. For projects anywhere else in Florida, we provide full statewide service.

Pricing depends on project complexity. Basic residential starts at $2,500 for simple patio/pool drainage design. Standard residential is $5,000-$10,000 for whole-property drainage. Commercial projects start at $8,000+ depending on site size and complexity. We provide detailed quotes after reviewing your specific project needs during a free consultation.

No. Our quotes include all engineering design and professionally stamped plans. Permit fees paid to the county/city are separate and vary by jurisdiction — we'll tell you exactly what those will be upfront. If revisions are needed due to county comments (rare with our 100% first-time approval rate), we handle those at no extra cost.

Typical timelines: Simple residential is 3-5 business days. Complex residential is 1-2 weeks. Commercial projects take 2-4 weeks depending on scope. Rush services are available for time-sensitive projects at an additional fee.

Permit review times vary by jurisdiction. Palm Beach County is typically 2-4 weeks. Broward County is 3-5 weeks. Miami-Dade County is 4-6 weeks. Smaller municipalities are often faster, 1-3 weeks. We track all submissions and respond to any comments quickly to minimize delays.

To begin your project, we typically need a property survey (we can help you obtain one if needed), site photos showing drainage issues or project area, description of your project goals, and any existing plans (if adding to previous construction). Don't have everything? No problem — schedule a free consultation and we'll guide you through what's needed.

Retention systems hold water and let it percolate into the ground — common in South Florida due to sandy soils. Examples include dry wells, French drains, and swales. Detention systems temporarily hold water and release it slowly to the storm system. Your engineer will recommend the right approach based on your soil type and local requirements.

Most Florida building departments require drainage plans to be sealed by a Professional Engineer (PE). An engineer stamp means the design has been reviewed and approved by a licensed professional who takes legal responsibility for its accuracy and safety. This protects you and ensures the system will actually address your drainage problems.