Stone in Tenant Improvement Build-Outs: Specs & Landlord Rules

A residential kitchen remodel answers to one homeowner and one calendar. A commercial tenant improvement (TI) job answers to a landlord's work letter, a general contractor's master schedule, a property manager's rules of conduct, and whatever other tenants are still operating on the same floor. The stone scope is usually small by square footage — a reception desk, a run of break room counters, a few restroom vanities — but it carries a disproportionate amount of coordination. Templates have to clear an approval chain before they get cut, crews have to badge into a building they do not own, and a slab or finished top has to travel through a freight elevator and a loading dock that were sized for office furniture, not stone.

None of this is exotic once a shop has run a handful of TI jobs, but it trips up fabricators who price the work like a residential job with a bigger number attached. This guide walks through what actually changes on a TI build-out: how the landlord's work letter and building standard set the ceiling on what gets installed, how a general contractor's fast-track schedule compresses templating and fabrication, what stone scopes show up again and again in office and retail suites, how to read a finish schedule and a submittal package before pricing, and what close-out and maintenance handover looks like once the suite is occupied.

Core Concepts: Why a TI Build-Out Runs on Someone Else's Clock

Every TI project starts with a work letter between the landlord and the tenant. It spells out the building standard — the finish package the landlord will provide or allow at no extra cost — and a tenant improvement allowance, a dollar figure the landlord will contribute toward the build-out. Stone almost always sits above building standard, which is usually plastic laminate or a basic solid surface in back-of-house areas. That means the tenant, not the landlord, is paying the delta, and the stone sub's contract chain usually runs through the tenant's build-out general contractor rather than the landlord's base-building contractor. Before pricing a scope, confirm which GC is actually holding the subcontract and which party signs change orders, because the two are not always the same entity on a multi-tenant floor.

A general contractor's master schedule treats the stone scope as one line among dozens of finish trades, usually sequenced after drywall taping and paint and ahead of final cabinetry hardware and millwork trim. Commercial finish schedules carry float measured in days, not weeks, and a missed submittal approval or a delayed field measure does not just slip the stone install — it can push every trade behind it. Billing on a TI job typically follows a schedule of values tied to completed milestones rather than a shop's own invoicing habits, so a fabricator needs to understand the GC's schedule logic as well as its own shop capacity before committing to a date.

Occupied-building work adds a layer that a standalone remodel never has. Many TI suites sit on a floor where other tenants are actively working, so cutting, grinding, and polishing often have to happen after business hours or on weekends, with noise and dust curfews written into the building rules. A crew typically needs a certificate of insurance on file with the property manager before anyone is issued a visitor badge, and some buildings require a building engineer or security escort for any trade working outside normal hours. Respirable crystalline silica control matters here as much as it does in a shop: OSHA's permissible exposure limit is 50 micrograms per cubic meter as an 8-hour time-weighted average, with an action level of 25 micrograms per cubic meter, and dry-cutting stone next to occupied office space without local exhaust or wet methods is both a code violation and a fast way to get a trade barred from the building.

Freight elevators and loading docks are the other structural constraint, and they are sized for office freight, not slab crates. A typical freight elevator car runs roughly 6 feet by 8 feet with a door opening between 48 and 72 inches wide, and most are rated between 4,000 and 6,000 pounds, with larger buildings running higher. A 3-centimeter granite slab weighs somewhere in the range of 17 to 20 pounds per square foot depending on density, so a full slab can clear the weight limit before it clears the door opening — one reason most TI stone arrives pre-fabricated to finished-piece size rather than staged whole on site. Dock reservations, elevator booking windows, and floor protection are usually spelled out in the tenant rules, and damage to common areas is routinely charged back to whichever trade caused it; a slab dolly or cart rated for the actual piece weight is cheap insurance against both.

Practical Guide: Running a Stone Scope Through a TI Job

Typical Stone Scopes in a TI Package

The stone scopes that show up on repeat across office, medical, and retail TI jobs are smaller and more detail-dense than a kitchen package. A reception desk top is often the single most visible and most heavily detailed piece in the whole suite — waterfall ends, backlighting, or a radius front are common, and it is frequently the first thing a visitor touches. Break room counters and employee kitchen tops see heavier day-to-day abuse than a reception desk but a lower design budget. Restroom vanities are usually the most code-constrained scope because accessible stalls and lavatories carry specific clearance requirements. Conference table tops are large single pieces with tight flatness and seam tolerances because they sit under direct overhead lighting. Feature walls and lobby cladding are the scope most likely to require a mock-up before the GC will release fabrication.

Reading the Spec Package Before You Price It

A commercial finish schedule lists every room by number, not by name, and cross-references each surface to a material code defined elsewhere in the spec book. A fabricator pricing off a floor plan alone, without pulling the matching finish schedule page, is guessing at which rooms actually get stone and which get a laminate substitute with a similar look in the rendering. The finish schedule is also where quartz vs. natural stone vs. solid surface decisions get locked in per room, and it is common for one suite to mix all three across reception, break room, and restroom scopes. Always confirm the finish schedule revision date matches the drawing set revision date; TI sets get revised often, and an outdated finish schedule is one of the most common sources of a wrong-material fabrication error.

Submittals are the formal approval step between pricing and fabrication: cut sheets, material samples, shop drawings, and sometimes a fabricator qualification letter get packaged and sent up through the GC to the architect and, often, the tenant's own designer. Each reviewer can take days to weeks to respond, and a rejected submittal resets the clock. Building that lead time into the fabrication schedule avoids the common mistake of promising a start date that assumes same-week sign-off. On a fast-track job, ask the GC directly how many submittal review cycles the schedule has actually budgeted, rather than assuming one pass will be enough.

Larger or more visible scopes — feature walls, backlit panels, anything with a finish or jointing pattern that is hard to describe in a spec note — frequently require a physical mock-up and sample approval before the GC will release full fabrication. A mock-up is not the same as a sample chip; it is usually a full-size or large-scale section built to the actual detail, including seams, edge profile, and lighting if the final installation is backlit. Treat the mock-up as its own scheduled deliverable with its own lead time and its own sign-off, because an unapproved mock-up stalls every downstream fabrication step on that scope.

Measuring Before Drywall Closes vs. After Finishes Are In

On a fast-track TI schedule, there is often pressure to template before drywall is finished, while framing, blocking, and rough plumbing stub-outs are still visible and easy to verify. A rough-in verification at this stage catches a mislocated sink stub-out or missing blocking for a wall-hung vanity while it is still cheap to fix, but any dimension taken before finishes go on is provisional — it assumes the drywall, tile, and millwork will land exactly where the drawings say, which on a multi-trade job is not guaranteed. A rough template is useful for ordering material and planning seams; it is not a substitute for a final measure.

The final template has to happen after walls are finished, cabinetry or base cabinets are set, and any wall-hung fixtures are mounted, because that is the only point where actual as-built conditions — out-of-plumb walls, a cabinet run that landed an eighth of an inch off drawing, a fixture centerline that shifted during install — are visible. The tension on a TI job is that the final template slot is usually one of the last windows before the stone has to be installed, which compresses fabrication time. Tools built for fast, accurate field dimensions, from a laser distance meter to a story pole for tall feature-wall runs, earn their keep most on exactly this kind of compressed-window TI templating.

Advanced and Trade-Specific Considerations

Phasing and fast-track delivery are common on larger TI jobs, where a GC issues partial drawing sets and begins construction on early floors or zones before the full design is finished. A stone sub working a phased job may template and fabricate the same scope type — say, restroom vanities — three or four separate times as each phase comes online, rather than once for the whole floor. Each phase effectively resets the submittal, template, and fabrication cycle, so the schedule risk is not eliminated by finishing one phase early; it is distributed across several smaller deadlines that can each slip independently.

Change orders on a TI job are not optional paperwork; they are the mechanism that protects both the fabricator's price and the schedule. A verbal field change — a different edge profile requested at the final walk, a sink relocated after templating — needs a written, priced change order signed before fabrication proceeds, not after. GCs on commercial jobs are used to this discipline from other trades and will generally expect it from the stone sub as well; skipping it is one of the more common ways a fabricator ends up absorbing cost on a change nobody formally approved.

Some TI work, particularly on public, institutional, or union-shop jobs, carries prevailing-wage or union labor requirements that affect crew composition, certified payroll reporting, and sometimes apprentice-to-journeyman ratios on site. These requirements vary significantly by jurisdiction and by project funding source, so confirm the specific obligations with the GC or owner's representative before bidding rather than assuming standard shop labor rates and crew makeup will apply; the requirement affects cost and staffing, not the stone scope itself.

Coordination with other trades matters more on a TI job than on a standalone remodel because the stone scope is wedged between electrical, plumbing, and millwork work on the same compressed schedule. A blocking location confirmed with the framer may get covered by a later HVAC diffuser relocation; a sink centerline coordinated with the plumber may shift if the rough-in gets value-engineered. Attending the GC's weekly trade coordination meeting, even for a scope as small as a reception desk, usually surfaces these conflicts before they turn into a field change order.

Close-Out, Warranties and the Maintenance Handover

Close-out on a TI job is a documentation exercise as much as a construction one. The GC typically assembles a close-out binder for the architect and owner that includes operation and maintenance manuals, as-built dimensions, material and lot or batch information for every finish installed, and warranty letters from each subcontractor. A stone sub that cannot produce clean documentation at this stage — what material was installed, what sealer or finish was applied, what the care instructions are — holds up the whole close-out package and, often, final payment along with it.

A written warranty document for a TI stone scope should state plainly what is covered — typically material and workmanship defects — and what is excluded, such as damage from improper cleaners, impact damage, or normal wear on a high-traffic surface like a reception desk edge. Vague warranty language is a common source of disputes months after occupancy, when facilities staff who were not involved in the original project try to figure out who to call about a chip or a seam that has opened up.

Maintenance handover is frequently skipped on smaller TI scopes, and it shows up later as premature wear or improper cleaning damage. Facilities or janitorial staff should get a short, specific instruction sheet: approved cleaners, a sealer reapplication interval if the stone is sealed, and what not to use — generic all-purpose cleaners and abrasive pads are the two most common sources of avoidable damage on commercial stone surfaces. Handing this to the tenant's office manager at substantial completion, rather than assuming the GC will pass it along, closes a gap that otherwise surfaces as a warranty call six months later.

The punch list and final walk close out the stone scope the same way they close out every other trade on the job: open items get a date and an owner, and final retention payment is usually tied to punch completion rather than substantial completion alone. Walking the finished scope with the GC's superintendent before the owner's final walk, rather than waiting to be told about a problem, catches most punch items — a scratched edge, an uneven seam, a missing backsplash return — before they become part of a formal punch list that holds up payment.

Several of the processes above are covered in more depth elsewhere on the site: the jobsite protection and containment guide works through masking and floor protection for occupied common areas in detail, and the story poles and field measurement guide covers verification techniques that hold up well under a compressed TI template window. Both are worth reading alongside this one before quoting a first commercial build-out.