Framing
MEP rough-in work happens during the open framing phase. ATP coordinates both phases together.
Mechanical, Electrical & Plumbing in Pasadena & Los Angeles
The systems behind your walls define how your building performs. ATP coordinates mechanical, electrical, and plumbing trades as part of the construction process — sequenced, managed, and inspected to code before walls are closed.
What Mechanical, Electrical & Plumbing Involves
Mechanical, electrical, and plumbing — collectively referred to as MEP — are the building systems that make a structure functional. Mechanical covers HVAC and ventilation. Electrical covers power, lighting, and low voltage systems. Plumbing covers water supply, drainage, and gas lines. On any new build, addition, or remodel, MEP rough-in work must be completed during the open framing phase — before walls are closed and drywall begins. Each trade requires city inspection at rough-in and final stages. ATP coordinates all MEP trades under active project management — ensuring every trade is scheduled, sequenced correctly, and inspected on time so your project stays on schedule.
WHAT ATP HANDLES
- HVAC and mechanical system coordination
- Electrical rough-in and final coordination
- Plumbing rough-in and final coordination
- Gas line coordination where required
- Trade sequencing during open framing phase
- City MEP inspection management at rough-in and final stages
- Coordination between all trades to prevent conflicts and delays
Mechanical, Electrical & Plumbing Serving Pasadena & Los Angeles
ATP coordinates mechanical, electrical, and plumbing trades for residential and commercial projects throughout Pasadena and surrounding communities across Los Angeles. Our active project management ensures all trades are sequenced correctly and inspected on schedule.
- Pasadena
- Altadena
- San Marino
- Arcadia
- Sierra Madre
- Glendale
- La Cañada Flintridge
- Los Angeles County
- Surrounding communities
Don't see your city listed? Contact us — ATP serves clients throughout Los Angeles and can confirm coverage for your specific location.
Frequently Asked Questions About Mechanical, Electrical & Plumbing
What trades are included in MEP?
MEP covers three core building systems — mechanical (HVAC and ventilation), electrical (power, lighting, and low voltage), and plumbing (water supply, drainage, and gas lines). All three must be rough-in installed and inspected during the open framing phase before walls are closed.
Does ATP self-perform electrical, plumbing, and mechanical work?
All MEP trades are coordinated under ATP's active project management. Licensed trade contractors perform the work — ATP manages scheduling, sequencing, coordination, and inspection management so every trade is completed correctly and on time.
What happens if MEP trades are not properly sequenced?
Poor trade sequencing is one of the most common causes of construction delays — one trade working out of order can hold up the entire project. ATP manages all MEP trades under one coordinated schedule to prevent sequencing conflicts and keep your project on track.
Related Construction Services
Fire Sprinklers
Fire sprinkler installation is coordinated alongside MEP trades during the open framing phase.
Finishings & Interior
The phase that follows MEP approval — drywall, fixtures, and all interior finishes.
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ATP coordinates MEP trades throughout Pasadena and Los Angeles.