Permit Penalty Calculator

Unpermitted work triggers penalties at sale or permit pull. This calculator sizes back-permit fees + fines + inspection costs.

Normal permit fee

Penalty multiplier

Inspection/engineering

Fix-up if noncompliant

Total permit penalty

$4,700

Back permit fee

$1,500

Inspection + fix-up

$3,200

How the math works

Penalty = (normal fee × multiplier) + inspection + fix-up. Scales with scope.

Unpermitted garage conversion or ADU often triggers $5-15k in retroactive permitting. Discover it at Phase I and factor into purchase price.

How to Use

Enter scope of unpermitted work.
Enter fine multiplier (2-4x normal fee).
Enter inspection/engineering cost.
Read total permit penalty.

Frequently Asked Questions

When does this bite?

At resale, refi appraisal, or code enforcement. City pulls records + discovers unpermitted work + demands permits. Can force demolition of unpermitted additions.

Typical multiplier?

Most jurisdictions charge 2-4x standard permit fee as 'back permit' penalty. Plus inspection, engineering (structural review), and possibly fix-up costs if code-noncompliant.

Fix or ignore?

Always fix before sale — it's a major devaluation at the table. Pre-sale resolution cost is 10-30% of discount buyer would otherwise demand.

What counsel should I involve?

Transactional attorney for contracts and guaranties. Environmental consultant for Phase I/II findings. Construction counsel for change-order disputes. Tenant-landlord counsel for habitability, evictions, and relocations. Small LLs try to DIY; institutional operators have a retained attorney on call. The cost of early advice is far less than the cost of a mistake made in its absence.