Commercial & Office
A commercial office is leased before it's finished and re-leased every few years after. The MEP has to serve a tenant you haven't met yet — sized for a load you can only estimate, zoned for walls that don't exist, and metered so the next fit-out doesn't start from zero.
Designed for the Next Tenant — Not Just This One.
Core-and-shell and tenant improvement are two different problems, and we design both as one system. The shell sets the plant capacity, riser space, and zoning every fit-out inherits; the TI has to clear plan check on a leasing deadline. We size HVAC and power to real diversified load — not nameplate — to ASHRAE 90.1 and the local energy code, and keep systems flexible enough that re-stacking a floor doesn't mean re-engineering the building.

Core & Shell vs. Tenant Fit-Out
We design the base building and the tenant spaces as one coordinated system, not two disconnected sets.
- Central plant, riser, and shaft capacity sized for full build-out and diversified peak
- Tenant utility stub-outs, CT/submeter provisions, and demising-wall coordination
- Spec-suite and white-box documentation that drops in for faster leasing
- TI designs that land within the shell's reserved CFM, tonnage, and amperage
- Landlord/tenant scope splits aligned to the lease work letter and demising line
Energy Code & Performance
Office is where energy code bites hardest — a failed compliance path stalls a permit and a missed carbon cap costs the owner every year.
- ASHRAE 90.1 / IECC compliance, prescriptive or performance path with COMcheck or whole-building energy modeling
- Local overlays — California Title 24, NYC Energy Code and Local Law 97 carbon caps, state stretch codes
- Demand-controlled ventilation per ASHRAE 62.1 with CO2 reset on dense and variable spaces
- Daylight-responsive dimming, occupancy sensing, and automatic receptacle control per 90.1
- Building-level energy monitoring where required by the adopted energy code
- Tenant submetering for cost recovery, benchmarking, and disclosure ordinances
HVAC Systems & Comfort
Open plans, glass facades, and variable occupancy make office load anything but uniform.
- VAV, VRF, water-source heat pump, and fan-coil system selection and zoning
- Separate perimeter and interior zoning to absorb solar and glass-load swings
- Rooftop, WSHP loop, and central chilled-water plant options weighed against the program
- Airside/waterside economizer and after-hours tenant override controls
- BAS / DDC controls with documented Sequences of Operation (SOO)
- Block and zone load calculations tied to the actual envelope and orientation
Power, Lighting & Low-Voltage
Power has to be there for a tenant whose layout doesn't exist yet.
- Service and distribution sized to diversified tenant load per NEC Article 220
- Floor-by-floor panel, busway, and riser strategy with spare capacity
- Lighting design to ANSI/IES RP-1 office illuminance with code-compliant controls
- Tenant power, data, AV, and security rough-in pathways and back-boxes
- EV-ready parking and optional/standby power for life-safety and critical tenant loads
- Grounding, bonding, and surge protection for IT-dense fit-outs
Plumbing & Fire Protection
Core restrooms, breakrooms, and fire systems that flex with every re-stack.
- Domestic water, sanitary, and storm design to the IPC or UPC
- Core restroom fixture counts and tenant breakroom rough-in
- Domestic hot-water heating and recirculation sized to occupancy
- Fire sprinkler design and tenant coordination per NFPA 13, with sprinkler zoning coordinated for future tenant improvements
- Backflow prevention and grease/oil interceptors where tenant use requires
Quick answers about how we deliver design support for this sector.
Yes — and we design them as one system. The core-and-shell set establishes the plant, riser capacity, and zoning every tenant inherits; the TI lands within that envelope on the leasing schedule. Working both behind your seal means a fit-out never fights a shell decision it didn't know about, and re-stacks stay fast and cheap. We track reserved CFM, tonnage, and amperage per floor so capacity is never double-counted across suites.
We design to ASHRAE 90.1 and the IECC as the baseline, then apply the local overlay — California Title 24, the NYC Energy Code and Local Law 97 carbon caps, or a state stretch code — for the project's jurisdiction. We confirm the AHJ's adopted code edition up front, because that drives DCV thresholds, receptacle controls, and economizer rules. The compliance path is documented in the set so plan check is clean the first time.
Actual diversified load. Sizing office HVAC and power to nameplate inflates equipment, energy, and first cost, and it strands plant capacity the owner paid for. We use realistic occupancy, plug-load, and lighting densities with appropriate diversity and demand factors per NEC Article 220, then document the assumptions so the licensed engineer of record on your project can review the basis of design quickly.
Yes — it's some of the fastest-moving work we do for office clients. We keep a coordinated shell basis of design so each suite drops in without re-deriving capacity, which is how landlords hold leasing velocity up across a building. Spec suites, white-box, and warm-shell scopes are documented to whatever level your leasing strategy calls for.
We document the demising line clearly — what the base building provides (capacity, stubs, metering, fire-sprinkler density) versus what the tenant's TI carries — aligned to the lease work letter. That keeps change orders and finger-pointing down once the tenant's contractor mobilizes. The matrix travels with the criteria package so every tenant engineer builds from the same assumptions.
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