HOA, CDD, and the Monthly Costs Nobody Mentions
Your mortgage payment is only the beginning of the story.
You found the perfect floor plan. The payment calculator says you can afford it. You sign the contract feeling great — and then three months after closing, you open a bill you never saw coming.
It happens constantly. Buyers budget for the mortgage and forget the rest. In new construction communities, "the rest" can quietly add $400 to $900 per month on top of your principal and interest.
Let us talk about the charges that do not show up in the builder's glossy brochure.
HOA Fees: The Obvious One That Still Surprises People
Most new construction communities have a homeowners association. You probably knew that. What you might not know is how much the fees vary — and how fast they can climb.
In a typical new community in the Phoenix metro, HOA fees run between $50 and $250 per month. Master-planned communities with pools, splash pads, fitness centers, and staffed amenities can push past $300.
Here is the thing most buyers miss: the HOA fee you see when you sign your purchase agreement is often an introductory rate. The builder is subsidizing it while the community fills up. Once the builder hands control to the homeowners, fees frequently go up 15 to 30 percent within the first two years.
Ask for the HOA budget documents. Read them. Look at what the reserves actually cover and whether the association is underfunded for future maintenance.
CDD and Mello-Roos: The Tax That Is Not a Tax
Community Development Districts (CDDs) and Mello-Roos assessments are how many new communities pay for their own infrastructure — roads, water lines, sewer, parks, streetlights. The developer fronts the money, and buyers pay it back through an annual assessment that shows up on your property tax bill.
Except it is not really a property tax. It is a fixed debt obligation. Which means it does not go down when your home value goes down.
CDD assessments in Arizona and Florida typically run $1,500 to $4,000 per year. In some communities with extensive amenities, they push higher. Mello-Roos in California can add $3,000 to $8,000 annually.
Divide those numbers by twelve. That is your real monthly add-on.
Property Taxes: The Adjustment You Did Not Plan For
When you close on a new build, your initial property tax bill is often based on the land value alone — because the county has not reassessed the completed home yet. That first tax bill feels pleasantly low.
Then the reassessment hits, typically in year two. Your property tax can double or even triple. In Maricopa County, a $450,000 home might go from $1,800 per year on the initial assessment to $4,200 after reassessment. That is an extra $200 per month you did not budget for.
If you are working with an agent, they can help you estimate the post-reassessment tax before you commit. If you are researching on your own, check your county assessor's website for the current tax rate and apply it to the full home value — not the initial land-only assessment. The math is straightforward once you know where to look.
Landscape Maintenance: The Yard Has a Price Tag
In communities with front-yard landscape maintenance included in the HOA, you are covered. In communities without it, you are responsible. And in the desert, even a low-maintenance yard needs an irrigation system, quarterly trimming, and seasonal plantings to not look abandoned.
Budget $75 to $150 per month if you are hiring it out. More if you have a pool.
How to Find Out Before You Sign
Ask the builder's sales rep for the HOA fee schedule, CDD assessment amount, and estimated property tax at full valuation. These are not secret numbers — but nobody volunteers them either.
Ask specifically: "What will my total monthly non-mortgage housing costs be after the first reassessment?" If the answer is vague, that is information in itself.
Browse models and community details at NewBuilt.com, where we include HOA and CDD data when it is available — because the real price of a home is never just the sticker on the elevation sheet.
The Bottom Line
Add up your mortgage, property taxes (post-reassessment), HOA fees (post-builder-subsidy), CDD assessment, insurance, and yard maintenance. That is your real monthly cost. If that number does not leave room for a flat tire and a broken water heater in the same month, you need a different floor plan or a different community.
The mortgage is just the down payment on your monthly obligations. Know the full number before you sign.
