Unpermitted square footage: records to reconcile before an offer
Compare listing area, public records, permit status, and appraisal questions without assuming unpermitted space has zero value.
Quick answer
Treat a square-footage discrepancy as a records and scope question before turning it into a price adjustment. Compare the listing, available permit records, final approvals, and the intended use of the space. Ask the local authority and lender what needs verification. Neither automatic zero value nor automatic loan eligibility follows from the discrepancy alone.
Build a discrepancy ledger
Record the source and date of each area figure rather than choosing the largest or smallest as established fact. Ask what the stated area measures, which addition or conversion it includes, and whether the property records reflect that work. Do not multiply disputed space by a neighborhood price per square foot and call the result a verified loss.
Request the relevant permit and final-approval records from the actual jurisdiction. Sunnyvale's residential resources illustrate the local starting point; another city may use different records and processes. Record missing documents as missing, not as proof of a specific legal outcome.
Keep appraisal and construction questions distinct
Fannie Mae's appraisal guidance addresses how an appraiser comments on the quality, appearance, and value impact of an addition without permits. It does not justify a blanket claim that every such space is worthless or every loan is unavailable.
Ask the lender and appraiser how the observed discrepancy will be evaluated for this transaction. Separately ask what evaluation and written scope would be needed for any proposed corrective work. Avoid adding both a speculative area discount and a repair budget for the same assumption.
- Which rooms and uses do the records actually identify?
- What approvals or evaluations remain outstanding?
- Does the proposed correction alter the selected repair scopes elsewhere?
Sources: Fannie Mae: Improvements section of the appraisal report
Illustrative example
| Record | Area stated | Unresolved question |
|---|---|---|
| Listing | 1,800 sq ft | What is included? |
| Available public record | 1,500 sq ft | Does it reflect the later work? |
| Difference | 300 sq ft | Verify measurement and approval history |
| Price adjustment | Not established | Area arithmetic is not an appraisal |
Illustrative assumptions only; this is not a local quote, valuation, or promised concession.