QD Design produces sealed mechanical, electrical, and plumbing (MEP) construction documents for commercial projects across Texas, led by a Texas-licensed Professional Engineer. Every Texas city requires sealed MEP drawings for commercial permits; ours arrive with the load calculations, one-line diagrams, riser diagrams, and COMcheck reports reviewers expect — and we answer every comment until your permit is issued.
Mechanical
HVAC load calculations and equipment selection, ductwork design, ventilation per IMC (including breakrooms, salons, gyms, and assembly spaces), commercial kitchen exhaust with Type I/II hood design and makeup air per NFPA 96, walk-in cooler/freezer compliance, and dedicated outdoor air systems for childcare and healthcare occupancies.
Electrical
Service sizing and one-line diagrams, panel schedules, power distribution for kitchen and medical equipment, lighting design with IECC compliance (our AutoZone Austin design beat the lighting baseline by 31%), site lighting, NEC 2023 grounding and receptacle-control requirements, and generator/backup provisions.
Plumbing
Fixture counts per IPC/UPC, water and waste riser diagrams, water-heater sizing calculations, grease interceptor sizing, gas piping (NFPA 54), hot-water recirculation per IECC C404.5, and health-department requirements like indirect drains and prep sinks.
Energy Compliance
Full COMcheck packages — envelope, interior lighting, exterior lighting, mechanical — accepted by City of Houston, Austin, and every Texas jurisdiction we’ve submitted to.
Representative Projects
- 25,250 SF industrial renovation, Houston — schematic approved in 7 days
- AutoZone, Austin — 31% better than IECC lighting baseline
- Pharmaceutical cleanroom, Houston — precision environment, sealed and permitted
- KPot Korean BBQ, Dallas metro — per-table cooking ventilation
- Assisted living community, Tyler — life-safety-driven MEP
Frequently Asked Questions
Are you the engineer of record?
Yes — for the disciplines we design, QD Design’s Texas PE seals the documents and serves as engineer of record, including plan-review responses.
Do you work with outside architects?
Constantly. Architecture firms across Texas use QD Design as their MEP consultant; we return coordinated, sealed sets on schedule and answer city comments directly.
Can you design just one discipline?
Yes — mechanical-only, electrical-only, or plumbing-only scopes (e.g., our Florida senior-living project was mechanical design only; a Minnesota bakery was electrical + plumbing).
Send your plans — fee proposal within one business day.