Buying a building lot is exciting — and full of pitfalls if you skip careful due diligence. This guide explains the three legal and physical constraints that most often derail home builds: zoning, easements, and utilities. Read this before you sign a purchase agreement to avoid costly surprises and delays.
Why zoning, easements and utilities matter for site selection
- Zoning determines what you can build and how you use the land.
- Easements can limit where you place a house, driveway, or septic field.
- Utility access controls costs and timeline for getting services to your home.
These issues intersect with slope, soils, wetlands, access and neighborhood context. For broader red-flag checks see: What to look out for when building a house: 12 site selection red flags before you buy land.
Zoning: the rules that shape your build
Zoning is the municipal/regional code that sets land use and development standards. Key items to verify:
- Zoning designation and permitted uses — single-family, multi-family, accessory dwelling units (ADUs), home businesses.
- Setbacks — required front, rear and side yard distances that restrict building footprint.
- Lot coverage and floor area ratio (FAR) — how much of the lot can be built on and the allowed building bulk.
- Height limits and building massing — maximum stories or feet above grade.
- Minimum lot size and frontage — whether the lot legally supports a single house.
- Special overlays or historic districts — additional regulations or design review.
- Conditional uses and variances — whether your plan needs approvals beyond a building permit.
Action items:
- Get the local zoning map and written code from the planning department.
- Confirm permitted uses and accessory structures.
- Ask about pending zoning changes or comprehensive plans that might affect future value.
For neighborhood-level evaluation and context considerations, read: How to evaluate neighborhood context: what to look out for when building a house.
Easements: invisible rights that can limit building area
Easements are recorded rights that allow others to use part of your property for a specific purpose. Common types:
| Easement type | Typical width/pattern | Impact on buildability | Who enforces / benefits |
|---|---|---|---|
| Utility easement (electric/water/sewer) | 5–30 ft linear strips | No permanent structures, may limit foundations or driveways | Utility company / municipality |
| Ingress/egress (ROW) | Varies, often driveway width | Blocks primary access routes or dictates driveway location | Neighbor or HOA |
| Drainage / stormwater easement | Varies | Limits grading, lot stormwater design | Neighbor/municipality |
| Conservation / scenic easement | Large areas | Prohibits building in conserved areas | Land trust / conservation authority |
| Parking or access easement | Specific area | May require shared use or reserved space | Neighbor/HOA |
How to discover easements:
- Review the title report and recorded plat at closing.
- Order an ALTA/NSPS survey to show easement locations.
- Read the deed and CC&Rs (if in an HOA) for restrictive covenants.
Easements often show up late in the process. If a critical building pad sits in an easement, you may need an easement release or to redesign. For rural lots with ROW and service connection issues, see: What to look out for when building a house on rural land: access, ROWs and service connections.
Utilities: capacity, connection costs and timing
Utilities are critical to habitability and budget. Confirm these points for each service:
- Is municipal water and sewer available at the lot or nearby? If not, plan for a well or septic.
- Power: Is there a pole/transformer nearby, or will the utility trench and line extension be long?
- Natural gas: Available in some areas; otherwise expect propane or all-electric design.
- Telecom (internet/phone): Fiber vs DSL vs fixed wireless availability affects resale.
- Stormwater: Is the lot on a regulated drainage system requiring retention/detention?
Typical connection cost ranges (varies widely by site and region):
| Utility | Typical cost range (ballpark) | Notes |
|---|---|---|
| Water hookup (public) | $1,000–$10,000+ | Taps, meter, lateral; municipal fees apply |
| Sewage hookup (public) | $2,000–$20,000+ | Trenching, connection fees; longer distances cost more |
| Septic system | $3,000–$20,000+ | Soil type, system size, and permit costs vary |
| Power extension | $2,000–$50,000+ | Overhead vs underground; length and transformer needs drive cost |
| Gas line extension | $1,500–$15,000+ | Utility policy and distance matter |
| Fiber/internet | $0–$10,000+ | Provider availability and construction costs |
Action steps:
- Contact local utility providers for availability maps, capacity and written estimates.
- Request municipal tap fee schedules and timing for street cuts or inspections.
- If using septic or well, get a feasibility test (perc test, well yield evaluation) early. See: Soil tests, geotech and foundations: what to look out for when building a house.
For a primer on coordinating access and utilities during site selection, read: Site access and utilities primer: what to look out for when building a house.
Due diligence checklist — what to request before you buy
- Recorded deed and title report with exceptions and easements
- ALTA/NSPS survey showing property lines, easements, rights-of-way
- Zoning designation and written local code
- Building department review of permitted/conditional uses
- Utility availability letters and cost estimates
- Soil perc tests, geotechnical report if slope or poor soils suspected
- Floodplain / wetland maps and setback requirements — see: Floodplains, wetlands and setbacks: what to look out for when buying land to build a house.
- Covenants, Conditions & Restrictions (CC&Rs) or HOA rules
- Topographic map and existing drainage patterns
- Environmental constraints search and potential hidden costs: Land due diligence when building a house: environmental constraints and hidden site costs
Questions to ask the seller, title company and municipality
- Are there any recorded or unrecorded easements? Can you get copies?
- Has a previous owner applied for (or been denied) variances or conditional uses?
- Where are utility lines located and who maintains them?
- Are there pipeline, powerline, or conservation corridor restrictions?
- Are there expected special assessments, improvement districts, or future road projects?
Who to involve (and when)
- Real estate attorney — review title, easements and deed language
- Licensed surveyor — ALTA/NSPS or boundary survey before closing
- Civil engineer — site grading, stormwater, and utility layout
- Geotechnical engineer — soils, foundation recommendations
- Local planning/building staff — zoning confirmation and permit process
- Utility companies — written availability & cost estimates
- Title company — clear title and insurance
If you want to avoid surprises when picking a lot, see: Avoid costly surprises: what to look out for when picking a lot for your house.
Red flags that warrant walking away or pausing
- Significant parts of the buildable area fall inside recorded easements.
- Zoning prohibits your intended house type or requires lengthy variance processes.
- Utilities are more than a reasonable distance away and estimates are high.
- Lot is in a floodplain, protected wetland, or subject to frequent standing water.
- CC&Rs impose restrictive design rules or heavy fees that hamper your plans.
If the lot is sloped, make sure to combine geotech checks with drainage planning: What to look out for when building a house on a slope: soil, drainage and stability checklist.
Final steps: negotiate protections into the contract
- Include contingencies for: title review, survey, zoning verification, septic/well feasibility, and utility cost/time estimates.
- Ask for a seller credit or price reduction if utility or easement issues require design changes.
- Require access for consultants to perform tests and inspections prior to closing.
For a deeper dive into environmental constraints and hidden site costs during land due diligence, see: Land due diligence when building a house: environmental constraints and hidden site costs.
Being methodical about zoning, easements and utilities saves time and money. Use the checklist above, involve the right professionals early, and verify everything in writing before you commit. If you want, I can help you create a tailored due-diligence checklist for a specific lot — tell me the location, known utilities, and whether the site is rural, suburban or sloped.