Calculator updated ·
Today's RatesPayment CalcFeatured Lender
Request Quote
San Diego County · Tool

How much home can you afford in San Diego?

Enter your income, debts, and down payment. We'll show you a realistic target purchase price — with property taxes, homeowners insurance, HOA dues, and Mello-Roos factored into the full monthly payment.

Your Numbers

Adjust any value to recalculate instantly.

$
$
$
6.875%
%
$
$
$
43%
You Can Afford
$980,000
Comfortable range: $820K – $1.05M

Monthly Payment Breakdown

At your maximum price with all housing costs included.

Principal & Interest
$5,945
Property Tax
$939
Homeowners Insurance
$150
Mortgage Insurance
$0
HOA / Mello-Roos
$0
Total Monthly (PITI)
$7,034

Debt-to-Income Check

How your payment compares to standard underwriting thresholds.

Front-End (Housing Only)28%
Target: under 31% · hard cap around 36%
Back-End (Total Debt)32%
Max typical: 43% conventional · 50% with strong compensating factors

You're in a strong position.

At this price, your housing and total debt ratios are well within standard underwriting thresholds. You have room to stretch if the right home comes along, or stay conservative for cash flow flexibility.

Assumptions We're Making

These are the defaults baked into the calculation. They match typical San Diego County conditions in 2026. Change any value on the left to override.

Property Tax
1.15%
Typical effective rate in San Diego County incl. voter-approved bonds.
Insurance
$1,800/yr
Average homeowners premium; higher in wildfire overlay zones.
Loan Term
30 years
Fixed-rate. Use shorter terms to lower total interest, higher payment.
Reserves
2 months
Recommended buffer above down payment + closing costs.

How the Calculation Works

We solve backward from your maximum allowable monthly payment to a home price. The formula is constrained by three things in this order:

  1. 1. Back-end DTI. Your target DTI (default 43%) times your gross monthly income, minus your existing debts, gives the maximum total housing payment.
  2. 2. Subtract non-loan costs. Property tax, insurance, HOA, Mello-Roos, and (if applicable) mortgage insurance come off the top. What's left is available for principal + interest.
  3. 3. Solve for loan amount. Given the available P&I budget, rate, and 30-year term, we back into the maximum loan. Add your down payment to get the home price.

Why San Diego Is Different

Generic national calculators miss three things that meaningfully change the answer in San Diego:

  • Mello-Roos. Newer communities (Chula Vista, 4S Ranch, Santaluz, parts of Otay Mesa) carry special assessments of $1,500-$5,000+ per year on top of property tax. This calculator includes a Mello-Roos input — use it if you're shopping those areas.
  • HOA dues. Condos and planned developments commonly run $250-$800/month. A $100 HOA change is equivalent to roughly $16,000 in purchase price at today's rates.
  • Jumbo pricing tier. San Diego's conforming limit is $1,209,750 — above that, jumbo pricing and underwriting kick in. The calculator auto-adjusts the default rate when you select jumbo.

What This Calculator Doesn't Cover

This is a planning tool, not an underwriting decision. It doesn't account for:

  • Irregular income (bonuses, commissions, RSUs) that lenders average differently
  • Self-employed income adjustments (depreciation add-backs, K-1 distributions)
  • Student loan calculation quirks under Fannie Mae vs Freddie Mac guidelines
  • Non-occupant co-borrowers
  • Rental income offsets from other properties
  • Compensating factors underwriters use to approve higher DTIs

For a firm number, get pre-approved with a lender who can evaluate your full file. Use this calculator to set the range first, then validate with a real pre-approval.