Easements, Setbacks & Why Your Survey Matters More Than Your Plat

Two clients sit on identical-looking one-acre lots. One can build a 5,000 sf home. The other can only build a 3,200 sf home. The difference is invisible from the street — it's all in the easements, setbacks, and recorded restrictions. Here's how to read the legal layer.

Plat vs. survey — they're different documents

A plat is the recorded subdivision map. It shows the lot lines and the original easements when the subdivision was created. It's public record.

A survey is a current measurement of YOUR lot by a licensed surveyor. It shows actual boundaries, existing structures, encroachments, easements, setbacks, and any changes since the plat was recorded. It costs $800–$3,000 and you need one before you buy — not after.

If the seller offers you a 10-year-old survey, that's not the survey. Order a current one.

Easements — the lot you own but can't fully use

An easement is a legal right someone else has to use part of your land. The most common types:

• Utility easements — for power lines, water mains, sewer lines, gas lines. Usually 5–15 feet wide along property edges. You can't build over them.
• Drainage easements — for stormwater flow. Often run through the back or side of lots. No structures, no fill, no landscaping that obstructs flow.
• Access easements — for shared driveways or rear-lot access.
• Pipeline easements — for buried gas or oil lines. Can be 25–50 feet wide. Major buildable-area reduction.
• Conservation easements — for protected trees, wetlands, or habitats. Sometimes invisible until you read the title commitment.

Easements are forever. The easement on your lot today will be there for the next owner. They're not negotiable, they're not removable, and the city doesn't care that they make your build harder.

Setbacks — how close to the property line you can build

Setbacks are zoning rules — minimum distances from property lines that no structure can cross. Typical for a 1-acre residential lot:

• Front: 25–50 feet
• Sides: 10–20 feet each
• Rear: 20–30 feet
• Corner-side (on corner lots): often equal to front

Subtract setbacks from your lot dimensions to find your buildable envelope. On a 200×200 lot with 30 ft front, 15 ft sides, 25 ft rear setbacks, your buildable envelope is 170×145 = 24,650 sf out of 40,000 sf gross. That's 62% of the lot you can actually build on.

Deed restrictions — the rules that go with the dirt

Deed restrictions are private covenants recorded on the property — sometimes by the original developer, sometimes by an HOA. They can limit:

• Minimum and maximum square footage
• Number of stories (often max 2)
• Roof pitch (often minimum 6:12)
• Architectural style (often must conform to a neighborhood character)
• Exterior materials (often a list of approved siding, roofing, stone)
• Fence height, color, material
• Maximum impervious coverage (driveways + structures)
• Tree preservation requirements

Get the deed restrictions from the title company BEFORE you sign. Read them with your architect. A modern contemporary build doesn't work on a lot with restrictions requiring Mediterranean tile roof and stucco exterior.

HOA / ARC review — the human filter

Many neighborhoods have an Architectural Review Committee (ARC) or HOA that must approve plans before you can build. Their authority is sometimes substantial — they can require modifications, reject designs, or simply delay you by months.

Before you buy the lot, get a copy of the ARC guidelines and the approval timeline from current owners. "Six weeks" on paper often becomes "four months" in practice. Budget the time.

Real-world consequence

A client of ours bought what looked like a perfect 1.5-acre lot in Westlake. After we ran the buildable-envelope math, the 30-foot front setback, 20-foot side setbacks, 15-foot drainage easement at the back, and a 25-foot pipeline easement across the middle left them with about 7,200 sf of true buildable area. They wanted a 6,800 sf one-story home. It fit — barely — but with no room for a pool, no detached garage, and an awkward L-shaped footprint.

They almost passed. Then their builder ran the math BEFORE they signed, and they pivoted to a slightly smaller, two-story plan. The lot worked. Without the math, they'd have closed and discovered the constraint at design phase — months later, with thousands in design fees already paid.

Read the legal layer. It's cheaper than every alternative.

— Margaret Larsen, COO. Eighteen years guiding clients from first conversation through groundbreaking — budgets, contracts, permits, financing. Get the free Ultimate Home Building Checklist for the field-tested list we walk every Angel home through.