Licensed PE · 39-state coverage · Continental US
Engineer letters,
delivered with precision.
Sealed documents that close permits, clear inspections, and turn manufactured homes into real property — issued in 24–48 hours by licensed professional engineers across 39 states.
- 24–48h
- Typical turnaround
- 39 States
- Licensed PE coverage
- PE-sealed
- Every document
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States served
39
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Licensed PE
On every seal
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Turnaround
24–48 hrs
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Parent firm
Oasis Engineering
Coverage
Every category of engineer letter — one firm.
From foundation pours to post-storm damage, from manufactured home permanents to wind-load calcs under ASCE 7-22. One sealed signature, the same day you need it.
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Foundation
Site-built, manufactured home, repair certification
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Roofing
Reroof affidavits, dry-in, storm damage
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Manufactured homes
HUD 7584 / 4930.3 permanent foundation letters
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Permits & affidavits
Closure, missed inspections, in-lieu-of affidavits
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Wind & flood
ASCE 7-22, ASCE 24 flood-resistant construction
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Inspections
Rough-in electrical, mechanical, plumbing
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Services
Letters for every compliance need.
Every engagement is reviewed and sealed by a licensed professional engineer. Sealed documents are delivered digitally with printed copies on request.
- Most requested
Foundation certifications
HUD, IRC 2018/2021, and state-specific letters for site-built and manufactured homes.
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Permit closure affidavits
Resolve open or expired permits in St. Petersburg, Tampa, and surrounding jurisdictions.
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Missed inspection letters
Engineer letters that stand in for rough-in electrical, plumbing, and mechanical inspections.
Learn more → - Order online
Manufactured home letters
Turn a mobile home into real property — FHA, VA, and conventional loan ready. Order online.
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Structural repair specs
Fire-damaged trusses, retaining wall evaluations, foundation repair certifications.
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Code compliance reviews
Dallas IRC amendments, Florida Building Code, NC Building Code 2018 — we know the edges.
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Full catalog
Learn more about all types of letters we offer.
Inspections, flood-zone evaluations, well-capacity certifications, wind calculations, energy calcs, historical building reviews — see the full list of what a licensed PE can seal for you.
How it works
Three steps. No guesswork.
We've compressed what used to take weeks into a tightly-orchestrated 24–48 hour process, without cutting corners on code compliance.
- 01
Submit your project
Upload photos, plans, and permit details through our secure intake. We review within hours.
- 02
Virtual or on-site review
Schedule a video call with a licensed PE. On-site visits are available when required by the AHJ.
- 03
Receive your sealed letter
Digitally signed PDF delivered to your inbox — with printed copies shipped if requested.
Watch · 2 min
What is an engineer letter?
A short explainer on how a PE-sealed letter closes open permits, satisfies missed inspections, and documents compliance after the fact.
What is an engineer letter? — Oasis Engineering
Past letters
797 letters. 232 cities. 25 states.
Every dot represents a PE-sealed letter we've delivered. Click a marker to read what the letter covered and explore similar work in that city.
Articles
Engineering, plainly explained.
Field-tested insight on foundations, permits, and code compliance — written by practicing PEs.
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permits
Austin Permit Closure: Working With the 2021 Code and Central Texas Site Conditions
Austin adopted the 2021 I-Codes effective September 1, 2021, with extensive local amendments. How that affects permit closure, missed inspections, and engineer letters across Central Texas.
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foundation
Foundation Letters in DFW: Engineering for Blackland Prairie Clay
North Texas expansive clay drives most foundation letter demand in DFW. What a PE-sealed foundation certification has to address — plasticity index, post-tension design, drainage — and which code applies.
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code compliance
Georgia's 2024 IRC Transition: What Changed on January 1, 2026 — and What It Means for Your Open Permit
Georgia adopted the 2024 IRC with 2026 state amendments on January 1, 2026. What changed, which code governs your permit, and how metro Atlanta jurisdictions are handling the transition.
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.