PE-stamped as-built drawings, structural calculations, and engineer letters to legalize unpermitted additions, conversions, and structures — for homeowners and commercial owners.
Unpermitted work tends to surface at the worst moment: a home sale, a refinance, an insurance claim, or a code-enforcement notice. Global Forensic Engineers handles after-the-fact permitting engineering every day for residential and commercial properties. We inspect the existing construction, document it with as-built drawings and structural calculations, specify any upgrades needed to meet code, and prepare the PE-stamped engineering package building departments typically require. Final permit approval always rests with the local building official — our job is to give them a complete, defensible engineering submittal.
As-Built Field Verification
On-site measurement and inspection of existing framing, connections, and foundations for unpermitted construction.
Structural Calculations & As-Built Plans
PE-stamped drawings and calculations prepared for building-department submittal.
Engineer Letters & Certifications
Sealed engineering letters addressing the structural adequacy of existing work.
Code Violations & Red Tags
Engineering remedies and retrofit details to resolve code-enforcement notices and stop-work orders.
Additions, Conversions & ADUs
Room additions, garage and attic conversions, accessory dwelling units, decks, patio covers, carports, and retaining walls.
Real Estate & Refinance Support
Fast-turnaround engineering when unpermitted work holds up a closing, appraisal, or insurance renewal.
Our engineers are available for same-day consultations. Licensed in 25 U.S. jurisdictions with local teams nationwide.
Call (833) 511-2542Free consultation — tell us what was built, when, and what the building department or buyer is asking for.
Site inspection to measure and document the existing construction, with limited openings only if needed.
Structural evaluation against the applicable building code, including any required upgrades.
PE-stamped as-built drawings, calculations, and engineer letter ready for permit submittal.
Support responding to plan-review comments until the engineering is accepted.
Common questions about our after-the-fact permitting engineering services
In many jurisdictions, yes. Building departments commonly accept PE-stamped as-built drawings, structural calculations, and an engineer's evaluation as part of an after-the-fact permit. Final approval is always made by the local building official.
Room additions, garage and attic conversions, ADUs, decks, balconies, patio covers, carports, removed or altered load-bearing walls, retaining walls, and commercial tenant improvements.
Usually not. We start with a non-destructive inspection and only recommend limited openings when framing, connections, or footings cannot otherwise be verified.
Most residential after-the-fact packages are completed within days of the site visit. Rush service is available when a closing or code-enforcement deadline is approaching.
We serve every state where Dr. Mousavi is licensed, including Texas, California, and Florida, where unpermitted additions, garage conversions, and open permits are especially common.
Condition assessments and pre-purchase inspections
Code violations, workmanship, and construction defects
Independent causation for neighbor-related damage
Third-party review of plans and repair scopes
Speak directly with a licensed forensic engineer about your commercial, industrial, insurance, or litigation-related engineering matter. All consultations are confidential.