SC By SCWS Team | February 2, 2026 | 14 min read
Well Drilling Contract: What to Look For Before Signing
A well drilling contract is your protection on a $15,000 to $50,000+ investment. A good contract clearly defines what you're getting, what you're paying, and what happens when things don't go as planned. A bad contract—or no contract at all—leaves you vulnerable to misunderstandings, cost overruns, and disputes. This guide explains exactly what should be in your well drilling contract and how to spot potential problems before you sign.
📋 Contract Must-Haves at a Glance
- • Contractor's license number, name, and address
- • Detailed scope of work and specifications
- • Total price with itemized breakdown
- • Payment schedule (max 10% deposit)
- • Timeline with start and completion dates
- • Warranty terms in writing
- • Dry hole policy
- • Change order process
- • Permit responsibilities
California Contract Requirements
California law has specific requirements for contractor agreements. Contracts for jobs over $500 must include:
- Contractor's legal name and business address
- Contractor's license number
- Description of the work to be performed
- Contract price, including method of payment
- Approximate start and completion dates
⚖️ California Down Payment Law
California Business and Professions Code Section 7159 limits contractor down payments to $1,000 or 10% of the contract price, whichever is less. Any contractor demanding more upfront is violating state law.
Essential Contract Elements
1. Contractor Identification
The contract should clearly identify the contractor:
- Full legal business name — Exactly as registered with CSLB
- Physical business address — Not just a P.O. Box
- Contractor's license number — Must include C-57
- Phone number and email — For communication
- Workers' compensation policy number — Or exemption statement
2. Detailed Scope of Work
This is the heart of the contract. It should specify:
🔍 Drilling Specifications
Drilling Depth
Estimated depth and what happens if drilling goes deeper
Drilling Method
Air rotary, mud rotary, cable tool specified
Casing Details
Material (steel/PVC), diameter, wall thickness
Screen & Gravel Pack
Screen type, length, and gravel specifications
Well Development
Surging, jetting, airlifting to maximize yield
Well Seal
Sanitary seal/grout specifications
⚡ Equipment Specifications
Pump
Brand, model, HP, GPM rating (if included)
Pressure Tank
Brand, size (gallons), type
Control Box
Type, location, surge protection
Electrical
What electrical work is included
3. Pricing and Payment Schedule
The contract should clearly break down costs:
| Line Item | Example | Notes |
|---|---|---|
| Drilling cost per foot | $45/ft × 300 ft = $13,500 | Should state depth estimate |
| Casing | $3,500 | Specify material and depth |
| Pump and equipment | $3,500 | Itemize if possible |
| Pressure tank | $1,200 | Specify size and type |
| Electrical | $1,500 | Or state "not included" |
| Permits | $350 | County fees |
| Well development | $800 | Should be included |
Payment Schedule Example
- 10% ($2,400): Due upon signing to schedule work
- 40% ($9,600): Due when drilling begins
- 40% ($9,600): Due upon completion of drilling
- 10% ($2,400): Due after pump installation and system test
4. Timeline and Schedule
The contract should include:
- Approximate start date: When drilling will begin
- Estimated duration: How long drilling typically takes
- Completion date: When the entire system will be operational
- Weather delays: How weather impacts schedule
- Scheduling conflicts: What happens if contractor is delayed
5. Warranty Terms
Warranty details should be explicit:
| Coverage | Typical Terms | What It Covers |
|---|---|---|
| Workmanship | 1-2 years | Casing, seals, installation quality |
| Pump | 1-5 years (manufacturer) | Pump defects, motor failure |
| Pressure tank | 5-7 years (manufacturer) | Tank defects, bladder failure |
| Electrical | 1 year | Wiring, controls, connections |
⚠️ Warranty Exclusions
The contract should also clearly state what is NOT covered: lightning damage, power surges, normal wear, homeowner modifications, lack of maintenance, low water yield, and water quality issues. Understanding exclusions is as important as knowing what's covered.
6. Dry Hole Policy
This critical section defines what happens if drilling doesn't find adequate water:
A good dry hole clause addresses:
- Definition: What flow rate constitutes "adequate" water (typically 3-5 GPM minimum)
- Cost responsibility: What you owe if no water is found
- Reduced rates: Whether dry hole costs are discounted
- Second attempt: Options for drilling another location at reduced cost
- Maximum depth: At what point drilling stops to reassess
7. Change Order Process
Unexpected situations arise in well drilling. The contract should explain:
- How changes are documented: Written change orders required
- Approval process: Homeowner must approve additional costs
- Pricing for changes: How additional work is priced
- Communication: How contractor will notify you of needed changes
8. Permit Responsibilities
The contract should clearly state:
- Who obtains permits: Should be the contractor
- Permit costs: Included in contract or itemized
- Inspections: Who schedules required inspections
- Final documentation: Who files well completion report
For more on permits, see our San Diego well permit guide.
Contract Red Flags
Watch for these warning signs in well drilling contracts:
🚩 Vague Work Description
"Drill well and install pump" without specifications
🚩 Large Upfront Payment
Demanding more than 10% deposit
🚩 No License Number
License not displayed on contract
🚩 Missing Warranty
No warranty terms or vague promises
🚩 No Cancellation Rights
Missing 3-day right to cancel notice
🚩 All Risk on Homeowner
Contract only protects the contractor
🚩 No Change Order Process
No protection against cost overruns
🚩 Permits Not Mentioned
Suggests contractor may skip permits
Contract Review Checklist
✅ Before Signing, Verify:
Contractor Information
- ☐ Full legal business name
- ☐ Physical address
- ☐ License number (verified at CSLB)
- ☐ Insurance/workers' comp
Work Description
- ☐ Drilling depth estimate
- ☐ Drilling method specified
- ☐ Casing type and size
- ☐ Well development included
Equipment Details
- ☐ Pump brand and model
- ☐ Pressure tank size
- ☐ Electrical scope defined
- ☐ All equipment listed
Financial Terms
- ☐ Total price stated
- ☐ Itemized breakdown
- ☐ Payment schedule (≤10% down)
- ☐ Cost per foot for deeper drilling
Timeline
- ☐ Start date
- ☐ Estimated duration
- ☐ Completion date
- ☐ Delay provisions
Protections
- ☐ Warranty terms detailed
- ☐ Dry hole policy stated
- ☐ Change order process
- ☐ Cancellation rights
Your Rights as a Homeowner
California law provides several protections for homeowners:
- 3-day right to cancel: For contracts signed at your home after you initiated contact
- Deposit limits: No more than $1,000 or 10% as down payment
- Written contract required: For all jobs over $500
- CSLB complaint process: Recourse against licensed contractors
- Mechanics' lien protections: Proper notice requirements
Frequently Asked Questions
What must a well drilling contract include in California?
California law requires contracts over $500 to include: contractor's name, address, and license number; detailed description of work; total price and payment schedule; approximate start and completion dates; and notice of the 3-day right to cancel for certain contracts. Well contracts should also specify drilling depth, casing specifications, pump details, and warranty terms.
What payment schedule is standard for well drilling?
California limits initial deposits to $1,000 or 10% of the contract (whichever is less). A typical payment schedule is: 10% deposit to schedule, 40% when drilling begins, 40% on completion of drilling, 10% final payment after system is operational and inspected. Avoid any contractor demanding 50%+ upfront.
What should the contract say about drilling deeper than estimated?
The contract should clearly state: what the estimated depth is, the cost per foot if drilling continues deeper, any maximum depth at which you'll stop and reassess, and whether you must approve additional depth. This is where cost overruns commonly occur, so clarity is essential.
What warranty should a well drilling contract include?
A good contract includes workmanship warranty (typically 1-2 years), pump/equipment warranty (typically 2-5 years), what's specifically covered and excluded, process for making warranty claims, and whether parts and labor are both covered. Get warranty terms in writing—verbal promises are hard to enforce.
Should the contract address what happens if no water is found?
Yes, this is essential. The contract should specify the dry hole policy: what you'll owe if no usable water is found, whether there's a reduced rate for dry holes, options for drilling a second location, and at what point a well is considered 'dry.' Don't assume—get it in writing.
What casing specifications should be in the contract?
The contract should specify: casing material (steel vs. PVC), casing diameter (6-inch is standard for residential), wall thickness/schedule, depth of casing installation, screen type and length, and grout/seal specifications. These details affect well longevity and water quality.
What red flags should I look for in a well drilling contract?
Red flags include: vague descriptions of work, large upfront payment requirements (over 10%), no warranty terms, no change order process defined, contractor not licensed on document, no mention of permits, all risk placed on homeowner, and missing cancellation rights.
Can I cancel a well drilling contract after signing?
California provides a 3-day right to cancel for contracts signed at your home (if you initiated contact). The contract must include notice of this right. After 3 days, cancellation depends on contract terms. Once drilling starts, you'll typically owe for work completed.
Get a Clear, Fair Contract From SCWS
Southern California Well Service provides detailed written contracts that protect both parties. Our quotes itemize everything—no surprises, no hidden costs. We explain every section and welcome your questions. Contact us for a free consultation and straightforward quote.
