Site Plans & Engineering
Mechanical, Electrical & Plumbing Engineering
Mechanical, electrical and plumbing engineering and load calculations by licensed engineers, coordinated with the licensed trades who install it.
Overview
Mechanical, electrical and plumbing (MEP) engineering designs the systems that make a building usable: air conditioning and ventilation, power and lighting, water supply, drainage and gas. On commercial projects and larger residential work, those systems are often designed by licensed engineers before the trades install them.
MEP drawings and calculations are prepared, signed and sealed by licensed professional engineers. We coordinate their designs with the architecture and structure – duct routes through trusses, panel locations, plumbing stacks, equipment pads – so systems fit where they need to go and can be permitted and built.
On many residential projects, licensed trade contractors design their own systems under the permit. Where engineered drawings are required or helpful, we bring in an MEP engineer; if you already have MEP drawings, we coordinate from those.
Who it’s for
- Commercial build-outs and new buildings where engineered MEP drawings are required for permit
- Restaurants and food-service spaces with hood, grease and gas requirements
- Large custom homes with complex HVAC zoning, generators or high electrical loads
- Renovations that add significant load, such as a full electrical service upgrade
- Projects with existing MEP drawings that need coordination with a new layout
What’s included
Typically included
- HVAC load calculations and equipment sizing for the building envelope and use
- Mechanical design: equipment selection, duct layout, ventilation and exhaust
- Electrical engineering: service size, load calculations, panel schedules, circuiting and lighting layout
- Plumbing engineering: water supply sizing, sanitary and vent design, water heating and gas piping
- Coordination of MEP routing with structure, ceilings and architectural layouts
- Energy code documentation where the permit requires it
- Responses to plan-review comments through the engineer of record
- Coordination between the engineer’s design and the licensed trade partners who install it
Common exclusions
- Installation of the systems, which is performed by licensed electrical, plumbing and mechanical contractor partners
- Fire sprinkler and fire alarm design, coordinated with licensed fire protection contractors
- Utility company service upgrades and their fees
- Low-voltage, audio-visual and security design, scoped separately
Every proposal lists its own inclusions and exclusions in writing.
Materials, design options & upgrades
How pricing works
MEP engineering is priced per project. The engineer’s fee depends on building size and use, the number of systems to design, and the complexity of loads and routing; we include it as a separate line in the estimate.
The installed cost of the systems is priced from the engineered drawings by licensed trade partners. Accurate load calculations matter here: oversized equipment costs more and often performs worse.
What changes the cost
- Building size, use and occupancy type
- Commercial versus residential permit requirements
- Kitchens, labs or other spaces with high exhaust, gas or electrical demand
- Existing systems to be evaluated or reused
- Ceiling space and structural constraints on routing
- Energy code documentation requirements
If this work is part of a larger project, it’s priced within that project’s budget — please don’t add separate estimates together. Read the pricing guide.
Typical stages
Systems scope
We define which systems need engineered design and gather the architectural plans, equipment needs and existing system information.
Load calculations
The engineers calculate heating, cooling, electrical and plumbing loads that set equipment and service sizes.
System design
Equipment, routing and distribution are designed and coordinated with structure and ceilings.
Permit and review
MEP drawings are submitted with the permit set and reviewer comments are addressed.
Installation coordination
Licensed trade partners install to the drawings, with rough-in reviewed before walls close.
What affects the schedule
- Completeness of the architectural layout and equipment selections
- Utility company coordination for service size and location
- Plan-review comments on energy code and life-safety items
- Equipment lead times for HVAC units, panels and switchgear
Questions & answers
Does my home renovation need an MEP engineer?
Often not. On many residential projects, licensed trade contractors design their systems under their permits. Engineered drawings are more common for commercial work, large homes, or significant service upgrades, and we confirm what your project needs.
What is a load calculation?
It is an engineering calculation of how much cooling, heating, electrical capacity or water flow a building needs. It is used to size equipment and services correctly rather than by rule of thumb.
Who installs the systems?
Licensed electrical, plumbing and mechanical contractor partners install the systems and pull the trade permits. We coordinate them with the rest of the work and check rough-ins before walls are closed.
Start here
Planning mechanical, electrical & plumbing engineering?
A short form — three steps, a few minutes. Share plans or photos if you have them. We’ll review it and follow up using the contact details you provide.