Full catalog
Every letter a licensed PE can seal.
If it needs an engineer’s stamp, there’s a good chance we’ve delivered it. Below is the working list of letter types our team at Oasis Engineering handles day-to-day. Don’t see exactly what you need? Tell us about your project — odds are we can help.
Permits & inspections
Permit-ready documentation
Sealed letters that close permits, stand in for missed inspections, and satisfy local jurisdictions across Florida, Texas, North Carolina, and beyond.
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Permit Applications
Engineer letters and calculations required to submit a residential or light-commercial permit package.
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Missed / Affidavit Inspection Reports
Skip the drywall tear-out — a PE affidavit that replaces rough-in electrical, plumbing, or mechanical inspections.
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Construction Verification
In-progress or post-construction verification that work was completed to plan and to code.
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NC Appendix G Design Professional Inspection Form
The specific North Carolina form signed and sealed by a design professional to certify completed work.
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Home Inspections
Independent engineer-level evaluations of residential structures, systems, and components.
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Installation of Specific Equipment
Sealed letters covering generators, solar, EV chargers, pools, spas, hot tubs, HVAC replacements, and more.
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Foundation & structural
Foundation and structural letters
From HUD 7584 certifications to load-bearing evaluations, sealed by a licensed PE and accepted by the AHJ.
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Foundation Repairs
Post-repair certification letters confirming repairs meet the engineer of record’s specifications.
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Engineered Foundation Letters (TX cities)
IRC 2018/2021 foundation certifications in Dallas, Houston, Austin, San Antonio, Fort Worth, and across Texas.
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Structural Modifications
Wall removals, beam additions, truss alterations, and post-remodel structural verification.
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Load-bearing Capacity Certifications
Floor, deck, and roof load evaluations for equipment, storage, or occupancy changes.
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Capacity Evaluations
Feasibility letters for adding a second story, expanding a room, or hanging heavy fixtures.
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Design Validation
Third-party review and certification of another engineer’s or designer’s work.
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Real estate & financing
Letters for buyers, sellers, and lenders
Loan-ready and closing-ready documentation that clears title, meets underwriter requirements, and protects both sides of the deal.
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Loan and Mortgage Applications
Lender-accepted certifications for FHA, VA, USDA, and conventional loans.
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Manufactured Home Foundation Letters
HUD 7584 compliant foundation certifications that convert mobile homes to real property.
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Pre-Purchase Evaluations
Independent engineer review of a property before you sign — foundation, structure, roof, systems.
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Condominium Conversions
Engineering sign-offs required for converting apartments or commercial space into condominiums.
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Insurance Claims
Engineer reports supporting storm, hail, water, and structural damage insurance claims.
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Legal Disputes
Expert engineering reports and letters for construction-defect and property-damage disputes.
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Roofing, wind & weather
Roof and wind certifications
Same-day virtual roof inspections, dry-in affidavits, and sealed wind load calculations for Florida HVHZ and coastal jurisdictions.
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Roof Certifications
Age, condition, and remaining-life letters required by insurers and lenders.
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Re-Roof Affidavits
Permit closure affidavits for reroof permits that missed their final inspection.
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Dry-In Affidavits
PE affidavits confirming the roof was dried in to Florida Building Code requirements.
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Florida Wind Calculations
ASCE 7-16 / 7-22 wind load calculations for Florida HVHZ, coastal, and inland projects.
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Storm Damage Letters
Post-hurricane, post-tornado, and post-hail engineering evaluations and certifications.
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Hurricane Retrofit / Mitigation
Documentation supporting wind mitigation credits and hurricane retrofit scopes.
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Compliance & evaluations
Specialty compliance letters
For the edge cases — flood zones, historic buildings, environmental reviews, and water-capacity certifications.
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Flood Zone Issues
Elevation certificates, LOMA support, and flood-zone engineering letters.
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Environmental Compliance
Stormwater, erosion-control, and site-compliance letters for municipal review.
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Historical Building Evaluations
Structural assessments and preservation-compatible repair specifications for historic properties.
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Safety Audits
Walk-through safety evaluations for landlords, HOAs, and commercial property managers.
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Well Capacity Certification (TX TCEQ)
Texas Commission on Environmental Quality well-capacity certifications for subdivisions and developments.
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Soil Compaction & Density Testing
Proctor curves, density tests, and compaction reports stamped for permit review.
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...and more
Every project is different. Tell us about yours.
This list covers the majority of what we write, but it’s not exhaustive. If your permit reviewer, lender, or insurer is asking for something specific, send us the request and we’ll confirm whether we can seal it — usually within hours.
Ready to start?
Get a sealed letter in 24–48 hours.
Tell us about your project. Our team at Oasis Engineering will confirm scope, fee, and turnaround within hours.