Rob Hartley

Founder, AppealDesk · February 28, 2026

New Construction Property Tax Appeals: Fighting Overassessment from Day One

Updated March 2026

Your dream home is finally complete. Then the first tax bill arrives and your stomach drops. The assessment is 30% higher than what you paid.

Welcome to the hidden cost of new construction that builders don't mention: systematic overassessment.

Why New Construction Gets Overassessed

Counties love new construction for one simple reason: it's easy to overtax. Here's why your new home is likely overassessed:

1. The "Builder Grade Markup"

Counties assume every new home has:

• Premium finishes (even with builder grade)
• All available upgrades
• Perfect condition throughout
• Maximum market appeal

Reality: Most new homes have basic finishes to hit price points.

2. Phantom Features

Common "features" counties add that don't exist:

• Finished basements (when unfinished)
• High-end appliances (when standard)
• Landscaping value (on dirt lots)
• Deck/patio value (not yet built)

3. The Neighborhood Premium Trap

Counties apply "new development premiums" assuming:

• All amenities are complete
• HOA features are built out
• Streets are finished
• Commercial areas are developed

But you're paying for promises, not reality.

The $47,000 Mistake That Could Be Yours

Case Study: The Johnsons built in Austin's suburbs for $425,000 in 2025.

County's Assessment: $472,000 Their Reasoning: "New construction premium" Reality Check:

• Builder grade everything
• Unfinished backyard
• No window treatments
• Basic appliances

Appeal Result: Reduced to $431,000 Annual Savings: $1,127

Evidence That Wins New Construction Appeals

1. Your Builder Contract

This document is gold for appeals:

• Shows actual price paid
• Lists included features
• Identifies what WASN'T included
• Proves builder grade selections

Pro tip: Counties rarely have these details.

2. The "What You Actually Got" List

Document everything that's basic:

• Laminate counters (not granite)
• Builder paint (one color throughout)
• Basic carpet/flooring
• Standard fixtures
• Missing landscaping

3. Comparable Sales Reality

New construction comps must be:

• Same builder level (custom vs. production)
• Similar finish quality
• Actual closed sales (not list prices)
• True new builds (not 2-3 years old)

Timeline: When New Homes Get Assessed

Understanding timing is crucial:

Month 1-6: Under construction

• Usually assessed as land only
• Big jump coming

Month 7-12: First full assessment

• Often based on permits/plans
• Not actual inspection
• Highest error rate

Year 2+: Annual adjustments

• Compound on original errors
• Get harder to fix

Key insight: Appeal immediately. Don't wait for errors to compound.

The Builder Didn't Tell You This

Secret #1: Builders Negotiate Their Model Homes

While your house gets full assessment, builders often get reductions on their models. Same house, different tax bill.

Secret #2: "Lot Premiums" Don't Equal Tax Value

Paid $15,000 extra for a cul-de-sac lot? That doesn't mean your house is worth $15,000 more than your neighbor's.

Secret #3: Future Development Isn't Current Value

That "future shopping center" or "planned pool"? You shouldn't pay taxes on amenities that don't exist.

New Construction Appeal Strategies

Strategy 1: The "As Actually Built" Appeal

Show what you really got:

• Basic builder contract
• Standard features list
• Photos of actual finishes
• Missing items list

Strategy 2: The "True Comps" Appeal

Find real comparables:

• Other new builds in your development
• Same builder, same timeframe
• Similar square footage and features
• Actual sale prices

Strategy 3: The "It's Not Done Yet" Appeal

Document what's incomplete:

• Unfinished areas
• Missing landscaping
• Incomplete neighborhood amenities
• Construction defects being fixed

Red Flags in Your Assessment

Check for these common errors:

Square Footage Inflation

• Garage counted as living space
• Unfinished areas marked finished
• Covered patios included incorrectly

Feature Assumptions

• "Custom built" when it's production
• "Premium location" for standard lots
• "Upgraded" when everything's basic

Timing Issues

• Assessed before completion
• Future phases included
• Amenities that don't exist yet

Your First Year Game Plan

Before Move-In

1. Document everything with photos
2. Keep all builder paperwork
3. Note unfinished items
4. Save the basic options list

Month 1-3 After Move-In

1. Review your first assessment carefully
2. Compare to purchase price
3. Check for phantom features
4. Gather initial evidence

Month 4-6

1. Find comparable sales
2. Build your evidence packet
3. File appeal before deadline
4. Don't wait for "next year"

The Compound Effect of Overassessment

New construction overassessment is especially damaging:

Year 1: Pay extra on inflated base Year 2-5: Increases compound on wrong base Year 6-10: Nearly impossible to fix original error

Example: $50,000 overassessment costs:

• $1,250/year (at 2.5% rate)
• $6,250 over 5 years
• $12,500 over 10 years

That's a car. Or a year of college.

Success Stories: Real New Construction Wins

Houston: Production home reduced $65,000

"County assumed upgraded everything. We proved basic finishes."

Phoenix: New build reduced $43,000

"They taxed future community features that weren't built."

Dallas: Spec home reduced $71,000

"Assessment included finished basement - ours was unfinished."

Don't Make This Common Mistake

Many new construction owners think:

• "The assessment will go down next year"
• "They'll fix it when construction is done"
• "It's normal for new homes"

Truth: It gets worse, not better. Appeal now.

Your Next Steps

If your new construction is assessed above purchase price:

1. Act fast - You have 30-60 days typically
2. Document everything - Photos, contracts, features
3. Get professional help - New construction appeals are complex

The evidence packet you need includes:

• Builder contract analysis
• True new construction comps
• Feature-by-feature comparison
• Professional presentation

New construction appeals require specific evidence builders won't provide. AppealDesk specializes in documenting the difference between what counties assume and what you actually bought.