Getting an accurate deck or patio quote takes more than just a phone call—contractors need clear details about your project to give you real numbers. Without proper specifications, you'll get vague estimates that balloon later when work begins.
Define Your Project Before You Call
The first mistake homeowners make is reaching out without a plan. Contractors can't quote accurately when you say "I want a deck" with no other details. Before contacting anyone, nail down these essentials:
- Dimensions: Measure the proposed footprint in feet (e.g., 12×16, not "medium-sized")
- Height and elevation: Ground-level decks cost significantly less than ones requiring substantial posts and stairs
- Materials: Pressure-treated lumber (~$8–15 per sq ft), composite decking (~$15–30 per sq ft), or premium options like PVC (~$25–40 per sq ft)
- Railing and stairs: Spindle railings, cable railings, and composite stairs each affect price differently
- Existing conditions: Soil type, slope, proximity to utilities, and whether you're removing an old structure matter
Sketch a rough layout. Take photos of the site. The more visual reference a contractor has, the tighter the quote.
Gather Written Quotes from Multiple Contractors
Always get at least three quotes in writing. Phone estimates are worthless if you need to dispute later. Request that each quote includes:
- Itemized labor and material costs (not a lump sum)
- Timeline for completion
- Warranty details (labor and materials separately)
- Payment schedule (typical: 50% down, 50% on completion—avoid contracts requiring full upfront payment)
- Scope of work (what's included, what isn't)
Red flag: Any contractor who quotes over the phone without visiting your property. They're guessing, and your final bill will reflect it.
Ask About Site-Specific Factors
Your property's conditions directly impact price. Contractors often discover surprise costs mid-project that weren't in the original quote. Prevent this by discussing:
Structural requirements: Does your deck need a permit? In most areas, decks over 30 inches high or covering more than 200 square feet require building permits and inspections. This adds $200–800+ to the project.
Ground preparation: Clay soil, standing water, or steep slopes may require excavation, drainage solutions, or additional footings. Budget an extra $500–2,000 if your lot isn't ideal.
Accessibility: Narrow side yards or gated properties add labor time. Some contractors charge by the square foot; others charge hourly for difficult access.
Attached vs. freestanding: An attached deck tied into your house foundation costs more than a freestanding patio because it requires ledger boards and flashing to prevent water damage.
Understand the Price Range
For a standard pressure-treated wood deck in an average market:
- Basic ground-level deck: $12–18 per square foot (installed)
- Elevated deck with stairs: $18–28 per square foot
- Composite or premium materials: $25–50+ per square foot
A 12×16 deck (192 sq ft) in pressure-treated wood typically runs $2,300–$3,500. The same deck in composite runs $4,800–$9,600. Location matters—rural areas cost 15–25% less than urban or coastal zones.
Always ask if the quote includes permits, inspections, and cleanup. Some contractors bundle these; others bill separately.
Check Contractor Credentials
Before signing, verify:
- Valid business license and insurance (ask for proof)
- At least three references you can contact
- Whether they're bonded (protects you if they don't finish)
- Positive reviews on local sites
Mercoly lets you compare and find trusted deck and patio contractors in your area with verified reviews and detailed portfolios—saving time vetting multiple companies individually.
Plan for Hidden Costs
Even with a solid quote, surprises happen. Budget 10–15% extra for unexpected issues like buried rocks, rotted rim joists, or utility line relocations. Ask contractors upfront how they handle change orders and whether additional costs require written approval before work proceeds.
Frequently Asked Questions
Q: How long does a typical deck or patio project take? A: A standard 200–300 sq ft deck takes 2–4 weeks from permit approval to completion; patios can be done in 1–2 weeks depending on material and complexity.
Q: Should I go with the cheapest quote? A: No—the lowest bid often reflects cut corners on materials, labor quality, or warranty. Compare mid-range quotes with strong reviews rather than chasing the absolute lowest price.
Q: Do I need a permit for a patio? A: Most patios don't require permits, but decks almost always do if elevated. Check your local building department before planning your budget.
Start with Mercoly to compare screened contractors in your area and request quotes today.