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The six mistakes that cost Colorado buyers the most money are: shopping without a written pre-approval, skipping the radon test and sewer scope, ignoring metro district taxes and HOA dues, buying without a buyer's agent under a written agreement, choosing a house before choosing the commute, and letting a bidding war set the budget. Each one is avoidable with a number, a deadline or a document, and this guide gives you all three.
Denver metro detached homes sell for $600,000 to $650,000 at the median, and attached homes for $400,000 to $420,000. At those prices a single mistake on inspection or taxes costs $5,000 to $30,000. Here is how buyers in Denver, Aurora, Littleton, Centennial, Highlands Ranch, Castle Rock and Parker avoid all six.
Mistake 1: Buying without a buyer's agent under a written agreement
Since August 2024, Colorado brokers are required to sign a written buyer agreement before showing a home, and the buyer's agent compensation is negotiated in that agreement rather than set by the listing. Buyers who skip the agent to save the buyers agent cost give up the person who writes the offer, tracks 12 or more contract deadlines and negotiates the inspection resolution.
What to check before signing with any Colorado buyer's agent:
- License and record: Verify the license at the Colorado Division of Real Estate and ask for 5 closed purchases in your price range in the last 12 months.
- Contract knowledge: The Colorado Contract to Buy and Sell Real Estate has dated deadlines for inspection objection, inspection resolution, appraisal, loan termination and HOA documents. Ask the agent to walk you through them in 5 minutes.
- Compensation in writing: The agreement states the fee, who pays it and what happens when the seller offers less. In most 2026 Denver metro closings the seller still pays part or all of it.
- Reviews: Read the Kenna Real Estate Group reviews and compare them with any other agent you interview.
The how we help buyers page lists what the Kenna Real Estate Group does between the first showing and the closing table.
Mistake 2: Shopping without a written pre-approval
In the Denver metro a listing priced at the median receives its first offers within 3 to 7 days from March through July. Sellers' agents do not present an offer without a pre-approval letter attached. Get the letter before the first showing, not after you find the house.
A pre-approval is a lender's review of your credit, income and assets; a pre-qualification is a conversation. Colorado buyers with a household income under the county limit also qualify for CHFA down payment assistance and metroDPA in participating cities, and those programs take 2 to 3 weeks to set up. Mike Oswald, VP of Mortgage Lending at Rate, NMLS 261003, Equal Housing Lender, issues pre-approvals for the Kenna Real Estate Group's buyers within 24 to 48 hours of receiving documents. You are free to use any lender. Read the Colorado mortgage pre-approval guide and the financing page first.
Then set your own number below the lender's. A $650,000 approval at 2026 rates is a $4,300 to $4,900 monthly payment with taxes and insurance; decide the payment you want to live with before the lender tells you the maximum.
Mistake 3: Skipping the inspections Colorado houses need
A general home inspection costs $450 to $700 in the Denver metro and covers the roof, structure, electrical, plumbing and HVAC. Four Colorado-specific tests are worth adding on almost every house:
| Test | Cost | Why it matters in Colorado |
|---|---|---|
| Radon test (48 hours) | $125 to $200 | Colorado is an EPA Zone 1 state; about half of tested homes exceed 4 pCi/L. Mitigation runs $1,200 to $2,500. |
| Sewer scope | $150 to $250 | Clay sewer lines in Denver, Englewood, Arvada and Lakewood homes built before 1975 crack and root in. Replacement is $8,000 to $20,000. |
| Roof inspection with age | $0 to $150 | Hail season runs May to September. Insurers surcharge or decline roofs over 15 years old along the Front Range. |
| Structural engineer review | $400 to $700 | Expansive bentonite clay in Douglas, Arapahoe and Adams Counties heaves slabs and cracks foundations. Order it when the inspector finds cracks wider than 1/4 inch. |
The Colorado contract gives you an inspection objection deadline, and the seller has no duty to repair unless you object in writing by that date. Read radon and the Denver home purchase before inspection week.
Mistake 4: Ignoring the monthly costs after the mortgage
Colorado buyers who budget for principal and interest alone are surprised by $600 to $1,400 a month in other costs. On a $600,000 Denver metro home:
- Property taxes: $2,800 to $3,800 a year in an older Denver, Littleton or Lakewood neighborhood; $4,500 to $6,500 a year in a metro district in Parker, Castle Rock, Aurora, Thornton or Commerce City, where the district's mill levy repays the bonds that built the streets and water lines.
- Homeowners insurance: $2,500 to $5,000 a year on the Front Range because of hail. Get a quote during the inspection period, not after.
- HOA dues: $0 to $100 a month for a detached home in a master-planned community, $250 to $500 a month for a condo. Colorado's Common Interest Ownership Act requires the seller to deliver the HOA documents, and the contract gives you a deadline to review and terminate.
- Utilities: Xcel Energy gas and electric run $150 to $300 a month on a 2,000 square foot home; Denver Water and suburban water districts add $60 to $150.
- Maintenance: 1% of the price per year, or $6,000 on a $600,000 home. A Front Range roof replacement after hail costs $15,000 to $30,000 with a $2,500 to $10,000 deductible.
Closing costs for a Colorado buyer run 2% to 3% of the price; Colorado has no state transfer tax, only a documentary fee of one cent per $100. The closing costs for Colorado home buyers page itemizes them. The post how HOAs, metro districts and taxes affect Denver suburb buyers shows the tax difference street by street.
Mistake 5: Choosing the house before choosing the location
A house is fixed; the daily drive, the trail access and the walk to a coffee shop are not. Denver metro buyers who pick the neighborhood first and the house second report fewer regrets at the one-year mark. Do these four things before writing an offer:
- Drive the commute at 7:30 a.m. and 5:15 p.m. I-25 from Castle Rock to the Denver Tech Center takes 35 minutes at 6 a.m. and 60 to 75 minutes at 7:30. C-470, US-36 and I-70 have the same pattern.
- Check RTD access. Light rail and the A Line serve Denver, Aurora, Lakewood, Englewood, Littleton, Lone Tree and Westminster; most of Parker, Castle Rock and Erie have bus service only.
- Walk to the nearest park, trail and grocery store. Highlands Ranch has 70 miles of trails under HRCA; Denver's Cherry Creek and Platte River trails connect Littleton to Commerce City.
- Visit on a Saturday afternoon and a weeknight. Listen for I-25, the rail line, the airport flight path over Green Valley Ranch and Central Park, and the event noise near a stadium.
Start with the Denver metro area explorer, then the city pages for Littleton, Highlands Ranch and Parker, and the Highlands Ranch vs Castle Rock comparison for commute, space and cost side by side.
Mistake 6: Letting the market set your price
The Denver real estate market moves with rates, inventory and season. Active listings in the Denver metro peak in June and July and drop 30% to 40% by December. Buyers who shop in a multiple-offer spring add appraisal gap clauses and waive inspection objections to win; buyers who shop from October through January face 20% fewer competing offers and get seller concessions toward rate buydowns.
Three rules that keep emotion out of the offer:
- Set the walk-away price before the showing and write it on the offer worksheet.
- Never waive the inspection objection on a home older than 20 years in the Denver metro. Shorten the deadline to 5 days instead.
- Cap the appraisal gap at a dollar figure you have in cash after closing costs and reserves.
The making an offer on a Colorado home page and the Colorado market reports show current days on market and list-to-sale ratios by city.
What a first-time Colorado buyer does in order
- Pull credit and fix errors (30 days).
- Get a written pre-approval and check CHFA or metroDPA eligibility (1 to 3 weeks).
- Sign a buyer agreement with an agent who explains every contract deadline.
- Pick two or three areas by commute and trail access, then search every home for sale in Colorado.
- Offer with a walk-away price, an inspection objection deadline and an appraisal cap.
- Order the general inspection, radon test and sewer scope in the first 3 days under contract.
- Get an insurance quote and the HOA documents before the HOA deadline.
The first-time home buyer guide for Colorado and the Denver first-time buyer programs guide cover grants, loans and assistance in detail.
Where to go next
- The Colorado Home Buyer's Guide
- First-time home buyer guide for Colorado
- Closing costs for Colorado home buyers
- Common concerns of first-time home buyers in Colorado
- Homes for sale in Denver
- Meet the Kenna Real Estate Group agents
Talk to the Kenna Real Estate Group
The Kenna Real Estate Group at Keller Williams DTC has guided Colorado buyers since 2002, and every buyer gets a written deadline calendar, an inspection plan and a tax and HOA cost sheet before the offer goes in. Call or text 303-955-4220. A live person answers. Not a robot, not a phone tree. Or search every home for sale in Colorado right now.