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Texas · Licensed PE

Engineer letters in Dallas–Fort Worth

PE-sealed foundation certifications, permit closures, and missed-inspection affidavits across Dallas, Tarrant, Collin, Denton, and Rockwall counties.

24–48h
Sealed and delivered
Same-day
Site visits available
6+
Counties covered
PE-sealed
Licensed in Texas

Governing code

What code applies here

2021 International Residential Code with local amendments

Dallas adopted the 2021 I-Codes with Dallas Amendments effective May 12, 2023. Fort Worth adopted the 2021 IRC with its own amendments under Ordinance 25383-03-2022. The amendments differ between the two cities — and again in Plano, Frisco, and Arlington — so a letter has to name the right amendment set, not just "2021 IRC."

Source: City of Dallas — Current City Code →

Who reviews it

Texas has no statewide residential code mandate, so DFW is a patchwork of municipal adoptions. North Texas expansive clay soils also make foundation letters the single most requested document in this market — a foundation certification here has to address soil movement, not just slab thickness.

Services

Letters we issue in Dallas–Fort Worth

  • Permit closure affidavits

    Open or expired permit with work already complete. A sealed affidavit documents that the finished work meets code so the jurisdiction can close the file.

  • Missed inspection letters

    Rough-in electrical, plumbing, mechanical, or framing covered before inspection. A PE affidavit substitutes for the inspection without opening walls.

  • Foundation certifications

    New slab, repair verification, or lender-required certification — sealed against the adopted code edition and the site’s actual soil conditions.

  • Manufactured home foundation letters

    HUD 7584 permanent foundation certification for FHA, VA, and conventional financing. Turns a mobile home into real property.

  • Structural modification & repair

    Wall removals, beam additions, truss repairs, and post-damage structural certification for permit or insurance purposes.

  • Construction verification

    In-progress or after-the-fact verification that completed work matches the approved plans and the governing code.

Coverage

Where we work in Dallas–Fort Worth

Counties: Dallas, Tarrant, Collin, Denton, Rockwall, Ellis.

  • Dallas
  • Fort Worth
  • Plano
  • Frisco
  • Arlington
  • Irving
  • McKinney
  • Denton
  • Garland
  • Grand Prairie
  • Mesquite
  • Carrollton

FAQ

Engineer letters in Dallas–Fort Worth

What building code applies to an engineer letter in Dallas–Fort Worth?
2021 International Residential Code with local amendments. Dallas adopted the 2021 I-Codes with Dallas Amendments effective May 12, 2023. Fort Worth adopted the 2021 IRC with its own amendments under Ordinance 25383-03-2022. The amendments differ between the two cities — and again in Plano, Frisco, and Arlington — so a letter has to name the right amendment set, not just "2021 IRC."
How fast can you turn around an engineer letter in Dallas–Fort Worth?
Standard turnaround is 24–48 hours from the site visit or from receipt of documentation. Same-day site visits are available in Dallas–Fort Worth — we travel to the property, document conditions, and issue the sealed letter without waiting on a local subcontractor’s schedule.
Do I need a site visit, or can the letter be written from photos?
It depends on what is being certified and what the jurisdiction will accept. Some after-the-fact certifications can be supported by dated construction photos and permit records; concealed structural work and most foundation certifications require an on-site evaluation. We tell you which applies before you commit to a fee.
Is the engineer licensed in Texas?
Yes. Every letter is signed and sealed by a professional engineer licensed in the state where the property sits — in this case Texas. A seal from an engineer licensed elsewhere is not valid for a Texas permit.
Will the Dallas–Fort Worth building department actually accept an engineer letter?
In most cases yes, but acceptance is at the discretion of the authority having jurisdiction. Texas has no statewide residential code mandate, so DFW is a patchwork of municipal adoptions. North Texas expansive clay soils also make foundation letters the single most requested document in this market — a foundation certification here has to address soil movement, not just slab thickness. We write to the specific department’s expectations and, when a jurisdiction has a required form, we use their form rather than a generic letter.
What does an engineer letter cost in Dallas–Fort Worth?
Fees depend on scope, whether a site visit is required, and how much documentation already exists. We quote a fixed fee before starting — no hourly billing and no surprise change orders. Send the permit number and a short description and you will have a number the same day.

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.