Your tech office's speed, security, and scalability depend almost entirely on cabling and infrastructure decisions made during build-out. Getting this wrong means expensive rework, downtime, and contractor callbacks that derail your move-in timeline. This guide walks you through what actually matters when outfitting a new tech office space.
Structured Cabling: The Foundation
Structured cabling is your backbone—the organized system of cables, racks, and termination points that connects everything from desks to servers. During tenant improvement, you're running this before drywall closes up, which is why planning now saves thousands in future retrofits.
Most tech offices use CAT6A or CAT6 copper cabling for horizontal runs (desk-to-rack distances). CAT6A supports up to 10 Gbps and handles future growth better, though it costs roughly 15–25% more per foot than CAT6. For a 5,000 sq ft tech office, expect $8,000–$15,000 in horizontal cabling alone, depending on floor plan complexity and local labor rates.
Key consideration: Run extra conduit and pull strings during build-out. Adding a single additional pathway costs maybe $500 now but prevents $5,000+ in wall demolition later.
Rack Room & Equipment Space
Your main distribution frame (MDF) and any intermediate distribution frames (IDFs) need dedicated, climate-controlled space. A typical tech office allocates one small room (100–200 sq ft) for IT infrastructure, separate from general storage.
This space must have:
- Dedicated 20A circuits (at least two, preferably four)
- In-row cooling if you're running 15+ kW of equipment
- Raised flooring or cable trays for airflow management
- Fire-rated walls and doors
- Backup power infrastructure roughed in (conduit for generator runs, UPS placement)
Budget $3,000–$6,000 for basic rack room preparation during TI, not counting equipment. If you need in-row cooling, add another $8,000–$15,000.
Power Distribution & Backup Readiness
Tech offices burn more electrical load than standard commercial space. During build-out, you're deciding where circuits, panels, and UPS systems go—changes are cheap now, ruinous later.
Standard practices:
- Dedicated 30–50A circuits for server racks (not shared with HVAC or lighting)
- At least two independent electrical feeds to the MDF
- Conduit runs to planned UPS location and potential generator hookup
- PDU (power distribution unit) planning to avoid overloads
If you're adding a UPS system during TI, have the electrician rough in a dedicated 208V or 240V circuit. This typically costs $1,500–$3,000 extra but becomes $8,000+ to retrofit post-construction.
Wireless & Distributed Antenna
Modern tech offices rarely rely on a single WiFi access point. Distributed antenna systems (DAS) or mesh access points need AP (access point) mounting locations, PoE (Power over Ethernet) injectors, and cable runs planned into ceilings and walls.
Budget placement and conduit for:
- Wall-mounted APs (one per 1,500–2,500 sq ft of office)
- Ceiling-mounted APs for open areas
- Backbone fiber or CAT6A connecting APs back to the MDF
Wireless infrastructure roughed in during TI runs $2,000–$5,000; retrofitting adds 50–100% to that cost.
Fiber Backbone Considerations
If your office connects to multiple buildings, needs very high bandwidth, or plans a future hybrid setup, plan fiber backbone runs now. Running fiber conduit through walls and under floors during construction costs $1,000–$3,000; boring holes through finished walls costs $5,000–$10,000.
Even if you don't use fiber immediately, having dark fiber in place (runs that aren't active yet) gives you future flexibility for $1,500–$2,000 extra investment.
Coordination & Timeline
Cabling work typically happens during the mechanical, electrical, and plumbing (MEP) phase—weeks 4–8 of a standard 12–16 week TI. Coordinate closely with your general contractor and IT vendor to ensure:
- Cable runs don't conflict with HVAC ductwork or structural elements
- Termination panels and rack space are finalized before framing closes
- Testing and documentation happen before drywall
When comparing tenant improvement and build-out providers, platforms like Mercoly make it easy to find and compare contractors experienced in tech office infrastructure—just filter for cabling and IT infrastructure experience.
Frequently Asked Questions
Q: Can we upgrade cabling after move-in? Technically yes, but expect 3–5x the cost and significant disruption to operations. Plan comprehensive cabling during build-out instead.
Q: How much conduit should we install? As a rule, install 25–50% extra conduit capacity beyond your current needs—it costs almost nothing now and prevents bottlenecks as your team grows.
Q: What's the difference between MDF and IDF? The MDF (main distribution frame) is your primary hub connecting to the internet provider; IDFs are secondary distribution points on larger floors or buildings that feed back to the MDF.
Start by getting detailed quotes from contractors who specialize in tech office build-outs—their experience with infrastructure planning pays for itself immediately.