{
  "slug": "self-storage-vs-bigger-house-cost",
  "title": "Self-Storage vs Bigger House Cost Calculator",
  "heading": "Self-Storage Unit vs Bigger House Cost Calculator",
  "category": "financial",
  "url": "https://www.revenuelab.fyi/toolbox/self-storage-vs-bigger-house-cost",
  "summary": "Compare renting a storage unit indefinitely against the extra mortgage cost of more square footage.",
  "description": "Renting a self-storage unit for excess belongings costs a fixed monthly fee that continues forever, while buying a bigger house to fit everything raises your mortgage payment but builds equity in that extra space. This tool compares years of storage rent against the extra amortized cost of financing additional square footage, net of the equity you'd build, to see which is truly cheaper for your timeline.",
  "formula": "Storage Total = Monthly Rent × 12 × Years. Bigger House Net Cost = Extra Mortgage Interest + Extra Property Tax − Extra Appreciation.",
  "dateModified": "2026-09-06",
  "run_url": "https://www.revenuelab.fyi/api/public/calc?tool=self-storage-vs-bigger-house-cost",
  "inputs": [
    {
      "id": "storageMonthly",
      "label": "Storage unit monthly rent",
      "kind": "number",
      "hint": null,
      "default": 150,
      "unit": "$",
      "min": 0,
      "max": null
    },
    {
      "id": "extraSqftCost",
      "label": "Cost of extra square footage needed",
      "kind": "number",
      "hint": null,
      "default": 40000,
      "unit": "$",
      "min": 0,
      "max": null
    },
    {
      "id": "mortgageRate",
      "label": "Mortgage rate",
      "kind": "number",
      "hint": null,
      "default": 6.5,
      "unit": "%",
      "min": 0,
      "max": 15
    },
    {
      "id": "propertyTaxRate",
      "label": "Property tax rate",
      "kind": "number",
      "hint": null,
      "default": 1.1,
      "unit": "%",
      "min": 0,
      "max": 5
    },
    {
      "id": "appreciationRate",
      "label": "Expected annual appreciation",
      "kind": "number",
      "hint": null,
      "default": 3,
      "unit": "%",
      "min": 0,
      "max": 10
    },
    {
      "id": "years",
      "label": "Years to project",
      "kind": "number",
      "hint": null,
      "default": 10,
      "unit": null,
      "min": 1,
      "max": 30
    }
  ],
  "outputs": [
    {
      "id": "winner",
      "label": "Lower net cost option",
      "format": "raw",
      "hint": null,
      "primary": true
    },
    {
      "id": "storageTotal",
      "label": "Storage rent total",
      "format": "currency",
      "hint": null,
      "primary": false
    },
    {
      "id": "houseNetCost",
      "label": "Bigger house net cost",
      "format": "currency",
      "hint": null,
      "primary": false
    },
    {
      "id": "diff",
      "label": "Difference over horizon",
      "format": "currency",
      "hint": null,
      "primary": false
    }
  ],
  "worked_example": {
    "inputs": [
      "Storage unit monthly rent: 150 $",
      "Cost of extra square footage needed: 40000 $",
      "Mortgage rate: 6.5 %",
      "Property tax rate: 1.1 %",
      "Expected annual appreciation: 3 %",
      "Years to project: 10"
    ],
    "outputs": [
      "Lower net cost option: Bigger House",
      "Storage rent total: $18,000",
      "Bigger house net cost: $4,943",
      "Difference over horizon: $13,057"
    ]
  },
  "how_to": {
    "title": "How to use this",
    "steps": [
      "Enter storage unit monthly rent ($).",
      "Enter cost of extra square footage needed ($).",
      "Enter mortgage rate (%).",
      "Enter property tax rate (%).",
      "Enter expected annual appreciation (%).",
      "Enter years to project.",
      "Read your lower net cost option on the right — it updates as you type.",
      "Hit Share to keep the scenario or send it to someone."
    ]
  },
  "scenarios": [
    {
      "name": "Conservative",
      "description": "Lower-end numbers — what if things land soft?",
      "values": {
        "storageMonthly": 90,
        "extraSqftCost": 24000,
        "mortgageRate": 3.9,
        "propertyTaxRate": 0.66,
        "appreciationRate": 1.7999999999999998,
        "years": 6
      }
    },
    {
      "name": "Typical",
      "description": "Defaults — the most common real-world setup.",
      "values": {
        "storageMonthly": 150,
        "extraSqftCost": 40000,
        "mortgageRate": 6.5,
        "propertyTaxRate": 1.1,
        "appreciationRate": 3,
        "years": 10
      }
    },
    {
      "name": "Ambitious",
      "description": "Higher-end numbers — what if things really pop?",
      "values": {
        "storageMonthly": 240,
        "extraSqftCost": 64000,
        "mortgageRate": 10.4,
        "propertyTaxRate": 1.7600000000000002,
        "appreciationRate": 4.800000000000001,
        "years": 16
      }
    }
  ],
  "limitations": [
    "Results are estimates before tax, fees, and inflation unless an input explicitly covers them.",
    "Rates are treated as fixed for the whole period — variable-rate products will drift from this projection.",
    "This is educational maths, not financial advice. Check anything contractual with the lender or your accountant."
  ],
  "faq": [
    {
      "q": "Why does the bigger house model appreciation?",
      "a": "Extra square footage is an asset that (usually) gains value, partially offsetting the extra interest and tax cost — storage rent builds no equity at all."
    },
    {
      "q": "When does storage clearly win?",
      "a": "When you only need extra space temporarily (a move, seasonal gear, a life transition) — storage is flexible and cancellable, while a bigger house is a long-term commitment with closing costs to reverse."
    },
    {
      "q": "Does this include moving costs into storage?",
      "a": "No — add a one-time moving/transport cost to the storage side if relevant; it's typically small relative to years of rent."
    }
  ],
  "related": [
    "https://www.revenuelab.fyi/toolbox/self-storage-occupancy-breakeven",
    "https://www.revenuelab.fyi/toolbox/buy-vs-rent-home-cost"
  ],
  "license": "CC-BY-4.0",
  "citation": "RevenueLab — Self-Storage vs Bigger House Cost Calculator (https://www.revenuelab.fyi/toolbox/self-storage-vs-bigger-house-cost)"
}