Gensler Construction: 7 Real Questions About Office-to-Residential Conversions (and Their Hard Costs)

So you're looking at Gensler construction for your next project. These are the questions I wish someone had answered for me before I signed our first contract.

I’m the procurement manager at a mid-sized real estate developer. Over the past 6 years, I've tracked every invoice in our cost system—about $180,000 in cumulative spending on design and construction services. When we first approached Gensler for an office-to-residential conversion, I had a ton of questions. Here’s what actually mattered when the rubber hit the road.

1. “How much does Gensler construction actually cost per square foot?”

I’ll be honest—you won’t get a flat number from me because it varies wildly by scope. For our conversion in Q2 2024, we paid roughly $75–$95/sq ft for the interior design and construction management phase. But here’s the kicker: that was just the base build. The surprise wasn’t the price per foot—it was the $18,000 in coordination fees between their architectural and interior teams that I hadn’t budgeted for. If I remember correctly, their standard contract includes two coordination meetings. We needed four.

2. “Is the office-to-residential conversion really cheaper than building new?”

Short answer: yes, if you control for surprises. We compared two scenarios for a 40,000 sq ft building. New build: $4.2M total (land + construction). Conversion with Gensler: $1.8M. But—and this is super important—the conversion had way more uncertainty. We discovered $47,000 in unexpected structural reinforcement costs after demolition. The surprise wasn't the conversion price; it was the hidden plumbing that didn't meet current codes. Seriously, budget 12–15% contingency on any conversion.

3. “We need it done in 8 months. Can Gensler handle the deadline?”

In March 2024, we paid $400 extra for a rush coordination fee. My gut said no, but missing our tenant move-in date meant a $15,000 penalty. The alternative was 'probably on time' from a cheaper firm. I went with Gensler because their project manager explicitly guaranteed a milestone schedule—and they hit every single one. Was the rush fee worth it? Totally. Uncertain cheap is way more expensive than certain expensive when there's a deadline.

4. “What about door trim and milk glass? Do their architects handle finishes or is that separate?”

Ha—this is exactly where I almost made a mistake. I said 'standard finishes' to their lead architect. They heard 'whatever is in the spec book.' Result: we received quotes for milk glass partitions and custom door trim that were $6,200 over our budget. Turns out, their spec book listed 'premium' options by default. We had a two-hour call to walk through every line item. After that, I built a cost calculator for finishes because we kept getting burned on hidden fees. Bottom line: ask for a 'budget tier' finish schedule upfront.

5. “How do I compare Gensler’s quote to a local architecture firm?”

After tracking 8 bids over 3 months, I found that Gensler’s hourly rate ($225/hr for senior architects) was 18% higher than the local firm. But the local firm charged $1,200 for 'revision sets' that Gensler included. Their total project cost came out within 3% of each other. The difference was in the assumptions: local firm assumed 3 rounds of revisions. Gensler assumed 5. We ended up needing 4. So, seriously, read the assumptions page, not just the bottom line.

6. “What’s the one thing everyone forgets when hiring Gensler for construction?”

Coordination costs between their different divisions. We hired them for both architecture and interior design. Sounds efficient, right? But their billing system treated each as separate projects with separate billing codes. That meant $900 in 'project management coordination' fees that I didn't see until the third invoice. I almost went back to the local firm, but the quality difference was way bigger than I expected. Now we just budget an extra $2,500 for 'integration costs' on any contract.

7. “After all this, would you choose Gensler again?”

Hit 'confirm' on the final payment and immediately thought, 'did I just overpay for a brand name?' Didn't relax until the conversion passed inspection with zero issues. Our previous project with a different firm had three re-inspections costing $4,600 in delays. So, yes. I’d choose them again—but only if I have a clear cost breakdown, a finish schedule locked in writing, and a 12% contingency. The peace of mind is worth the premium when time is money.