A widely-used starting rule is that your maximum home price should be 3–4× your gross annual household income. On a $120,000/year combined income, that's a $360,000–$480,000 home. But in San Diego — where the median home price exceeded $850,000 in early 2026 — that rule alone won't cut it. Lenders care about your debt-to-income (DTI) ratio, down payment size, and current mortgage rates far more than raw multiples.
| DTI Type | What It Measures | Max Allowed (Conventional) |
|---|---|---|
| Front-end DTI | Housing costs ÷ gross monthly income | 28% |
| Back-end DTI | (Housing + all debts) ÷ gross monthly income | 43–45% |
| FHA loans | More flexible with compensating factors | 57% back-end (max) |
| VA loans | No front-end limit, residual income test | 41% guideline |
| Jumbo loans (SD) | Stricter — SD conforming limit is $1,016,650 | 43% back-end |
Get Your Free San Diego Contractor Cost Guide
Includes buying cost benchmarks, remodeling ROI, and contractor pricing for San Diego homeowners.
Download Free GuideThe table below assumes a 20% down payment, 7.1% 30-year fixed rate, and a back-end DTI of 43% with no existing debt. Actual numbers shift with student loans, car payments, and credit card minimums — plug your real numbers into the calculator below.
| Annual Household Income | Max Monthly Payment (28%) | Estimated Max Home Price | Down Payment (20%) |
|---|---|---|---|
| $80,000 | $1,867 | ~$280,000 | $56,000 |
| $100,000 | $2,333 | ~$350,000 | $70,000 |
| $120,000 | $2,800 | ~$420,000 | $84,000 |
| $150,000 | $3,500 | ~$520,000 | $104,000 |
| $200,000 | $4,667 | ~$700,000 | $140,000 |
| $250,000 | $5,833 | ~$870,000 | $174,000 |
A larger down payment does three things: lowers your monthly payment, eliminates PMI (private mortgage insurance, typically 0.5–1.5% of the loan annually), and makes your offer more competitive in San Diego's tight inventory. FHA loans allow as little as 3.5% down with a 580+ credit score but require MIP (mortgage insurance premium) for the life of the loan on 30-year terms — that can add $200–$400/month on a $700K purchase. Conventional loans with 10% down require PMI until you hit 80% LTV, which at today's prices takes 5–8 years in San Diego. If you can reach 20%, do it — the savings on a $750,000 San Diego home exceed $50,000 over 10 years in eliminated PMI alone.
Mello-Roos and HOA fees: Many San Diego communities — Chula Vista, Otay Ranch, Rancho del Rey — carry Mello-Roos assessments of $1,000–$4,000/year on top of property taxes. HOA fees in condo-heavy areas like Mission Valley or Downtown SD average $350–$700/month. Both count in your front-end DTI calculation, reducing your max purchase price significantly. Property taxes: San Diego County effective rate averages 1.1–1.25% of assessed value annually. On an $800,000 home, that's $8,800–$10,000/year ($733–$833/month) factored into your PITI payment. Homeowners insurance: San Diego's wildfire risk has pushed HO insurance premiums up 20–40% since 2022 — budget $2,000–$4,000/year for a single-family home, higher in WUI zones.
Several programs can shift your affordability ceiling meaningfully: CalHFA MyHome Assistance provides up to 3.5% of the purchase price as a deferred down payment loan (zero monthly payment until refinance/sale). San Diego Housing Commission runs a down payment assistance program with income limits around 80% AMI (~$85,000/year for a single buyer in SD). VA loans for veterans and active duty eliminate the down payment requirement entirely — particularly powerful in SD given the large military population. USDA Rural Development loans apply to some outer East County areas (Alpine, Ramona) and require 0% down. Each program has income, price, and usage restrictions — your lender can run a combined scenario through DU or LP.
Enter your income, debts, and down payment to get your instant maximum home price.
Open Affordability CalculatorFree San Diego Contractor Cost Guide
Buying costs, remodeling ROI, and contractor pricing benchmarks — updated for 2026.
Get Free GuideSan Diego's real estate market is one of the most competitive in California, with median home prices consistently above $800,000. Our home affordability calculator helps you understand what you can truly afford based on your income, debts, and down payment — not just what a lender will approve you for.
Financial experts recommend spending no more than 28% of your gross monthly income on housing (including principal, interest, taxes, and insurance), and no more than 36% on total debt. In San Diego's high-cost market, many buyers stretch beyond these guidelines. Our calculator helps you see the impact of different scenarios, including the long-term cost of exceeding recommended ratios.
Beyond the mortgage, San Diego homeowners should budget for property taxes (approximately 1.1% of assessed value annually), homeowners insurance ($1,000-$2,500/year), HOA fees (common in newer developments, $200-$500/month), maintenance (1-2% of home value annually), and Mello-Roos taxes in some newer communities. These costs can add $500-$1,500 per month to your housing expenses.
San Diego offers several down payment assistance programs that can make homeownership more accessible. The California Housing Finance Agency (CalHFA) offers forgivable grants up to 3.5% of the purchase price. The San Diego Housing Commission provides various programs for first-time buyers, including deferred-payment loans. VA loans offer 0% down for eligible veterans, while FHA loans require just 3.5% down. Understanding these options can significantly impact what you can afford.
San Diego's unique market conditions — from high property values to strict building codes — make professional cost estimation essential for any construction project. Whether you're planning a renovation, addition, or new build, using accurate calculators helps you budget effectively and avoid costly surprises. Always factor in permit fees, potential change orders, and a 10-15% contingency buffer when planning your project budget.
Our Network
Built by Cali Dream Construction · CSLB #1054602
Need a custom calculator for your trade business? We'll get back to you within 24 hours.