Case Study 1 — Fourteen Feet and an Airspace Problem: Solving the Northgate Site

All people, companies, and projects in this book are illustrative composites. Numbers are consistent within the book and are not drawn from any actual project.

Setup

The project. Northgate Outpatient Pavilion. Meridian Health System, owner. Kestrel Construction Group, CM at Risk with a $47,500,000 guaranteed maximum price. Four stories, 132,000 gross square feet, 985 tons of structural steel. Contract time 565 calendar days from a March 3 Notice to Proceed. Combined daily exposure to slipping substantial completion: $10,650 per calendar day — $5,150 of extended general conditions plus $5,500 of liquidated damages.

The site. 6.2 acres, sloping down from north to south. Marquand Avenue, a four-lane arterial, runs along the south edge. Selby Street, two lanes with houses across it, runs along the east. Meridian's existing medical office building and its patient lot occupy the west. And along the north — the reason this case study exists — the property line sits fourteen feet from the building at its closest point.

The neighbor. On the other side of that line is a two-story brick building housing Northgate Family Medicine, an independent physician practice with roughly forty employees and a waiting room that opens at 7:00 a.m. weekdays. The practice leases the building. The land and the building belong to Ardmore Properties, a small private landlord with no relationship to Meridian and no particular reason to be helpful.

The people.

• Ray Alvarez — Kestrel senior project manager.
• Margo Deacon — Kestrel general superintendent.
• Dani Okonkwo — field engineer, six months out of school.
• Hank Duffy — project manager, Ironbridge Steel, the erector.
• Grace Lindqvist — Kestrel VDC manager, who built the 4D erection sequence.
• Renata Bosco — practice manager, Northgate Family Medicine. Not a party to anything, but the person whose day you are about to ruin forty times.
• Pri Sethi — Meridian's owner's representative.

What Happens

January, Year 1 — six weeks before NTP

Ironbridge Steel submits its preliminary erection plan as part of buyout. Hank Duffy proposes a 275-ton crawler crane working from inside the building footprint on a timber mat road, erecting in five sequences and walking as it goes. It is the right crane. It is the cheap crane. Kestrel's estimate assumed it.

Grace Lindqvist overlays the erection plan on the survey and the property boundary in the model and sends Ray a single image with one red arc on it.

Grace: "Sequence 4. Northeast bay columns and the roof beams above them. To make those picks at that radius, the crane sets up here. When the boom swings to the pick, the boom tip and about eleven feet of counterweight cross the property line. Not over the clinic building — over the north twenty feet of Ardmore's parking lot and the airspace above it."

Ray: "How many picks?"

Grace: "Sixty-one, over about nine working days."

Dani: "But we're not touching their property. It's just air."

Ray: "Dani, go get me the deed exhibit and the ALTA survey, and then let's talk about what 'just air' means."

The airspace question

Here is the general principle, and it is a principle rather than a rule because it varies by jurisdiction and by fact pattern: a landowner's rights are generally understood to extend upward into the airspace to the height reasonably necessary for the use and enjoyment of the land. Swinging a crane boom, a counterweight, or a suspended load through a neighbor's airspace without permission is commonly treated as a trespass, and in many jurisdictions a neighbor can seek an injunction to stop it. That injunction is the real risk. A damages claim is money; an injunction in the middle of steel erection is a stopped critical path at $10,650 a day.

None of that is legal advice, and Ray does not treat it as such. What he does is call Meridian's construction counsel on January 14 and ask one question: "What do we need from Ardmore Properties before a boom crosses that line, and how long does it take to get it?"

The answer comes back: a written license agreement — a private, revocable permission to use the airspace on stated terms. Not a permit. No government issues it. There is nothing to appeal and nobody to escalate to. Ardmore can simply say no.

⚖️ What the contract says. Standard general conditions typically make the owner responsible for easements necessary for the permanent project, and the contractor responsible for the permits and accommodations necessary for the means and methods of construction. A crane oversail license lives in the seam between those two, which is precisely why it must be assigned in the preconstruction meeting rather than argued about in August. On Northgate, Kestrel negotiated it, Meridian's counsel reviewed it, Kestrel paid the fee, and Meridian was named as an additional insured alongside Ardmore — because Meridian is the one who has to be a good neighbor to that practice for the next thirty years.

The three options, priced

Ray does what he always does: he makes the alternatives cost something on paper before he goes into a negotiation.

Option 3 costs a quarter of Option 1 and saves nine days on the critical path — but only if you start it in January. That is the whole lesson of this case study, and it is worth stating as baldly as possible: the cheapest option is only available early. If Kestrel discovers this problem in July, with steel on the ground and an erection crew mobilized, Ardmore's leverage is enormous and the fee is not $22,000.

February and March — the negotiation

Ray goes to Ardmore's managing partner with a package, not a request: the crane plan, the swing arc drawn on their own survey, the dates, the insurance, and a draft agreement. Then he does something that is not required and turns out to be decisive — he asks for a meeting with Renata Bosco, the practice manager, and asks her what she is worried about.

Her list is not the landlord's list.

Renata: "I don't care about airspace. I care about four things. My patients park in the fifteen stalls closest to your fence, and half of them use walkers. I have an HVAC intake on the roof on your side. I have a waiting room full of people at 7:15 in the morning and I cannot have a jackhammer twelve feet away. And I have a physician who does joint injections on Tuesdays and Thursdays in the exam room nearest your line, and she needs the room not to shake."

Ray writes all four down and builds them into the deal. The final agreement, executed in the last week of February — one week before NTP — contains:

The two hours-of-work restrictions cost money. Ironbridge reschedules the sixty-one oversail picks into two Saturdays plus four early-morning windows, and the Saturday premium for a nine-person raising gang comes to about $11,400.

Run the total: $22,000 + $9,500 + $4,200 + $11,400 = $47,100, against Option 1 at $191,850. Kestrel spent $47,100 and zero critical-path days to solve a problem that would have cost $191,850 and nine days.

The three phase versions of the logistics plan

The oversail agreement was the hardest single item, but it was one line in a bigger document. The Northgate logistics plan was issued in three versions, each with its own drawing, its own gate configuration, and its own binding constraint.

Read the clinic row across. The neighbor's complaint changes completely three times, and each version has a different mitigation. A single logistics plan cannot serve all three. That is the operational argument for phased plans, and it is why Margo re-issued the plan on August 1 and again on April 1 of Year 2, each time with a gate meeting and a walk.

Analysis

What worked, and why.

1. The conflict was found in a model in January, not on the ground in August. Grace's 4D overlay of the erection sequence against the boundary survey is a twenty-minute exercise that found a $191,850 problem. This is Theme 3 doing exactly what it claims: the cheapest place to fix anything is on paper.
2. The alternatives were priced before the negotiation. Ray walked into Ardmore's office knowing his walk-away number was $134,900 (Option 2). That is why he could offer $22,000 without flinching and without overpaying. A negotiation without a priced alternative is not a negotiation; it is a request.
3. He asked the tenant what she was worried about. Renata Bosco had no legal standing in the license agreement at all. She also had the ability to make eighteen months miserable, generate complaints to the city, and turn a neighbor into an adversary. The four items on her list cost Kestrel roughly $11,400 in Saturday premium plus a few thousand a year in filters, and they bought a working relationship that never once produced a call to the building department.
4. The plan was phased. The single most common logistics failure is a plan drawn once, in month one, for a site that will change three times.

What was fragile.

The whole solution rested on Ardmore saying yes. There was no fallback that did not cost six figures. If Ardmore had refused, Kestrel would have exercised Option 2 and had a fight with Selby Street. Ray's real protection was time — eight weeks of runway in which a refusal was survivable. Discovering the same problem in July would have converted a negotiation into a hostage situation.

What it would have looked like done badly. Erection begins. On the fourth day of Sequence 4, an Ardmore tenant photographs a counterweight over the parking lot and the landlord's attorney sends a letter demanding it stop. Work halts on the northeast bay. Now Kestrel is negotiating a license with a stopped crane, a mobilized raising gang, and a meter running at $10,650 a day. The fee is not $22,000.

Discussion Questions

1. Ray priced three options before negotiating. Work out what his position would have been if Option 2 (Selby Street) had been physically impossible — say, if Selby were too narrow for a truck crane. How much would he have been willing to pay Ardmore, and why?
2. Renata Bosco was not a party to the license agreement and had no legal leverage over Kestrel. Was spending $11,400 in Saturday premium on her concerns a business decision or a courtesy? Defend your answer with a mechanism, not a sentiment.
3. The agreement prohibits suspended loads over Ardmore's property at any time. Why is that clause more important than the hours restriction — and what does it tell you about how the parties thought about risk?
4. The Phase C binding constraint is parking and gate throughput. Identify the specific decision that had to be made in preconstruction, roughly eleven months before the constraint became binding, and explain why it could not wait.
5. Kestrel paid for the pre-construction condition survey of a building it does not own or occupy. Explain the economics of that decision using the $10,650 daily rate.

Your Turn

Draw the Phase B Northgate logistics plan as an annotated sketch — ASCII, pencil, or CAD, your choice. Show: fence line and three gates, the one-way truck loop, the 275-ton crawler with its swing arc and the property line it crosses, steel laydown, both hoists, washout and tire wash, trailers, dumpsters, the maintained fire lane, the vibration and dust monitoring stations, and the overhead protection canopy along the shared line.

Then write one paragraph answering the question Margo asked Dani on that cold morning: what is over the crane's counterweight when it swings, and who owns it?

Finally, list the three things that must be in hand before the first oversail pick — and put a date on each, counted backward from an August 4 steel erection start.