Used by 2,400+ homeowners · Estimates within 12% of actual bids

Most homeowners find out what
their renovation costs
on demo day.

There's a name for this: Renovation Blindness. Costara cures it.

Answer a few questions about your project and get a specific number — not a range from Google, not a contractor's protective ballpark. What it will cost. What could change it. What most contractors will not mention until they are already on site.

Free · No contractor needed · Takes 4 minutes · No account required
600+ Local markets
4 min Average time
147 Project variables — more than any contractor asks upfront
Free To find out
“The estimate came in at $87K. Our first contractor bid was $91K. I walked in knowing more than they expected.”
— Sarah M., Primary bathroom renovation, Denver CO
AFTER IN PROGRESS
No obligation · No contractor calls · No account required
A real number — not a contractor's protective range
Calibrated to your zip code — 600+ markets covered
Know what could move your number before demo day
How it works

From questions to clarity
in 4 minutes

Most people start this and cannot stop — because the number moves every time you answer a question.

01
Tell us what you are building

Scope, finishes, size, foundation, systems. The questions go places most tools do not — because those are the places where budgets actually move.

02
We price it to your market

Your zip code adjusts for local labor and material costs automatically. A tile shower in Manhattan costs nearly twice what it costs in Nashville. We know the difference.

03
Get your range — and what's behind it

Not just a number. A range with the 2–3 factors most likely to move it, and the hidden conditions that could change everything on demo day. Free to find out.

04
Walk into contractor calls with a number

You'll know what a fair bid looks like before anyone sets foot in your home. That changes the conversation — and usually the bid.

What Costara catches that contractors do not mention

The 15 things we flag
before you sign anything.

During your intake, Costara watches for specific project combinations that trigger hidden costs. These aren't generic warnings — they fire based on your actual answers, your project type, and your home's age. Here are three real examples.

⚠ Before You Go Further
Mortar bed showers weigh 400–600 lbs. Demo is a half-day job most quotes undercount.
A mortar bed shower pan is set in 3–4 inches of concrete. Removing it requires jackhammers, labor for two, and a dumpster fill. Most bath bids treat shower demo as a line item, not a specialty job. We flag it — and factor it into your estimate — the moment you tell us what's there.
Triggers when: Bathroom · existing mortar bed shower · any tile scope
⚠ Before You Go Further
Garage conversions require a change-of-use permit — and energy compliance most GCs do not plan for.
Converting a garage to living space triggers Title 24 energy compliance requirements or local equivalent standards in most jurisdictions. This means insulation, HVAC, and window upgrades that aren't in the typical contractor scope — and 6–10 weeks of permitting before a single wall goes up. We catch it before you sign.
Triggers when: Addition · garage conversion scope
⚠ Before You Go Further
Knob-and-tube wiring and full renovation permits do not coexist — most jurisdictions require full rewire.
Most jurisdictions will not issue a full renovation permit on a home with active knob-and-tube wiring without requiring electrical upgrade to current code. That's $18,000–$45,000 before any renovation work can proceed — and it is not in any standard GC scope unless you specifically ask. We tell you before anyone walks through your door.
Triggers when: Full Renovation · pre-1978 home · knob-and-tube wiring
What you get

Know your number.
Know what's behind it.

📊
Free Budget Range

Your specific investment range with the 2–3 biggest cost drivers explained. Calibrated to your zip code. Ready the moment you finish the intake — no account, no email required.

🧠
Intelligence Report — $49

9 sections. Trade-by-trade cost breakdown, hidden cost exposures, scope creep shield, project timeline, questions to ask every contractor, sanity check, and next steps in order. Delivered in 15 seconds. What a consultant charges $300–$500/hr to produce.

📍
Priced to Your Market

A tile shower in Manhattan costs nearly twice what it costs in Nashville. Your estimate adjusts automatically to local labor and material costs — covering 600+ markets across all 50 states.

🔒
No Pressure. No Calls. No Account.

This is just for you. No contractor will contact you. No one gets your information unless you choose to share it. Use this to walk into every conversation knowing more than they expect.

Walk into every contractor meeting
knowing more than they expect.

The $49 Intelligence Report is what you'd normally pay a construction consultant $300–$500/hr to produce — and they'd need a site visit first. This delivers it in 15 seconds, specific to your project and your market.

  • Trade-by-trade cost breakdown — every dollar explained
  • Hidden cost exposures specific to your project
  • What would push your number over budget — ranked by likelihood
  • Scope creep shield — a documented boundary around your scope
  • Project timeline — phase by phase, when things happen
  • Questions to ask every contractor — written for your scope
  • Independent sanity check on your budget and timeline
  • Next steps in order — from estimate to groundbreak
Costara Intelligence Report · Sample
$81,500 – $96,400
Kitchen renovation · Chicago IL · Full gut
Cabinetry & Hardware $23K – $27K
Countertops $9K – $11K
Plumbing Rough-In $4K – $6K
Electrical & Lighting $4K – $8K
Demo & Permits $3K – $7K
Risk Flag
Pro-grade appliance package adds $18K–$45K before installation — budget accordingly.
Full report unlocks after payment · $49
Coverage

Calibrated for your city,
wherever you are

New York, NY
Los Angeles, CA
Chicago, IL
Houston, TX
Phoenix, AZ
Philadelphia, PA
San Antonio, TX
San Diego, CA
Dallas, TX
San Jose, CA
Austin, TX
Denver, CO
Nashville, TN
Seattle, WA
Miami, FL
Boston, MA
Atlanta, GA
Portland, OR
Las Vegas, NV
Charlotte, NC
Scottsdale, AZ
Charleston, SC

You'll never sit across from a contractor
not knowing if the number is real.

4 minutes from now you'll know what your renovation should cost, what's driving it, and exactly what to ask every contractor you interview. That changes the conversation — and usually the bid.

Free · No account · No contractor calls · Results stay on your screen

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