Getting three bids is only the beginning. Here's how to analyze what's actually in each estimate — and why the lowest number is often the most misleading.
Homeowners frequently receive two or three estimates for the same project and find they differ by $20,000, $40,000, or more. This is almost never a sign that one contractor is cheating you — it usually reflects fundamental differences in what's actually being proposed.
The first step in comparing remodeling estimates is understanding that you're often not comparing the same thing. Contractors make different assumptions about scope, quality, timeline, and risk allocation. Without understanding those differences, you cannot make a sound decision.
A professionally prepared estimate will break costs into categories. Compare at the same level of detail across all bids:
A low bid that omits permits, dumpster fees, engineering, and material overages can easily become the most expensive option after construction begins.
Scope is the single biggest driver of estimate variation. A kitchen estimate might include:
When you receive estimates, ask each contractor to walk you through every scope item and explicitly confirm what is not included. This is how you find the gaps.
In Charleston, additional scope often emerges during demolition — outdated wiring in older homes, plumbing that doesn't meet current code, or moisture damage behind walls near the coast. Ask how each contractor handles these discoveries: is there a contingency line? A process for change orders? A fixed fee for unknowns?
Allowances are one of the most misunderstood parts of a remodeling estimate. An allowance is a placeholder dollar amount for materials you haven't selected yet — a $5,000 cabinet allowance, a $2,000 tile allowance.
Allowances create risk for you as the homeowner. If your actual selections exceed the allowance, the cost difference is added to your final invoice. Contractors who use low allowances can make their bids appear competitive while knowing the final number will be significantly higher.
Ask every contractor: "What are your allowances based on?" If the answer is vague, push for specifics. What brand of cabinets? What price-per-square-foot tile? What fixture lines?
The most transparent estimates will specify materials by manufacturer, model, or line — making it far easier to compare bids on equal footing.
Labor costs vary based on how work is performed: by direct employees, subcontractors, or a mix. There's no single correct model, but understanding the contractor's approach tells you something about accountability and quality control.
In Charleston's coastal market, experienced trade crews are critical. Salt air and humidity require correctly installed materials from the start — a poorly installed window or shower can fail in 3–5 years rather than 20+.
A well-constructed estimate will include:
The goal is a document detailed enough that both parties understand exactly what is being built, with what materials, by when, for how much — and what happens when something changes.
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