A tenant signs a Bay Area lease with a build-out allowance that sounds generous. Months later, three things have gone sideways. The allowance turns out to be a reimbursement, paid after invoices are submitted, not money waiting in an account. Moving two walls triggered accessibility upgrades to the corridor and the restroom that nobody's number included. And rent started on a date the lease set, whether or not the space was open.
None of that is a construction problem. It's a lease problem that shows up during construction. By the time a general contractor (GC) hands you a price, most of the terms that price has to live inside were already fixed by a document you signed before you had a contractor.
This is about what that document decides, and what to settle while it's still negotiable.
What is a work letter, and why does it decide more than your construction contract?
A work letter is the exhibit to your commercial lease that defines who builds what, who pays for what, what the improvement allowance can be spent on, and the approval steps you both have to clear. It is negotiable before you sign the lease. After you sign, it's the governing document, and your construction contract has to fit inside it.
Tenant improvement (TI) work sits inside a structure you didn't design. You, the landlord (often represented by a property manager or a construction representative rather than the landlord personally), and the general contractor each hold part of the authority, with an architect, subcontractors, equipment vendors, and the building department layered on top. The work letter is where that split is written down. When it's vague, the vagueness doesn't disappear — it surfaces as a cost dispute during construction.
One structural detail worth reading closely: landlords commonly require submittals at defined intervals, with a landlord review-and-approval step at each one. Those approvals are usually sequential rather than parallel. Preliminary design has to be approved before construction documents get reviewed. A delay at any step pushes everything behind it, and the review windows in your lease are often shorter than the design work realistically takes. We handle the design and construction sides of a project under one contract, which removes a handoff, but it doesn't remove the landlord's approval loop. Nothing does. You plan around it.
Which parts of the build-out is your landlord actually paying for?
Only what the work letter names as landlord's work. Everything else is yours, and the improvement allowance is a separate mechanism that covers some of your side, not all of it.
It helps to sort every item in the space into one of three buckets:
- Landlord's work. The landlord builds it and pays for it. Usually base-building conditions — the shell, core restrooms, primary utilities brought to a point, sometimes a demised and finished ceiling grid.
- Allowance-eligible tenant's work. You build it, and the allowance reimburses you up to a cap. Allowances are frequently restricted to hard construction costs, which means design fees, permit fees, and project management may or may not draw against it.
- Excluded. Not landlord's work, not allowance-eligible, and therefore entirely yours on top of everything else.
The third bucket is where budgets break, because the items in it don't look like construction. Furniture, fixtures, and equipment (FF&E). Telecom and data cabling. Security systems and access control. Signage. Point-of-sale hardware. Specialty equipment. Each one has to be bought, delivered, and installed by someone, and if the work letter and the construction contract are both silent, nobody has priced it.
The practical test is to ask for a responsibility matrix — a line-by-line list of who buys and who installs each of those items. If neither your lease exhibit nor your contractor's proposal contains one, that absence is the finding. Build it yourself and make both parties confirm it in writing before work starts. Tenant improvement projects that go badly on cost usually go badly here first.
When does your rent start if the build runs late?
Commonly at substantial completion of your work or on a fixed calendar date, whichever arrives first. That single clause converts a schedule problem into a rent problem, and it's the reason build-out schedule matters more in tenant improvement work than the construction scope alone would suggest.
Most commercial leases also define Landlord Delay and Tenant Delay as specific terms, with day-for-day schedule relief and sometimes rent abatement attached to the landlord's side. That structure has a predictable side effect: when something slips, both parties are financially motivated to attribute the delay to the other rather than to jointly diagnose what actually happened. Knowing that in advance is worth more than any assurance about how well everyone will get along.
The part you control is the Tenant Delay list. Read it and find out exactly which of your own acts count. Late submittal of drawings, late finish selections, and change requests made after documents have been issued for permit are common entries. Terms vary widely between leases and landlords, so read your actual clause rather than assuming yours matches the pattern — and if any of it is ambiguous, that ambiguity is cheaper to fix now than to argue about later.
How does the improvement allowance actually get paid?
Usually as a reimbursement, in draws, after the work is done and documented — not as money available up front. This is the single most common surprise for a first-time commercial tenant, and it changes what the project requires from your working capital.
A tenant improvement (TI) allowance draw package typically requires invoices for the work completed, lien waivers from the contractor and subcontractors, and often an architect's certification of percentage complete. Landlords commonly hold retainage until the end, and many allowances carry an expiration date after which unspent funds are forfeited. The mechanical consequence is that a documentation gap stalls your money independent of how construction is going. A perfectly-built project with an incomplete draw package doesn't get paid.
Four questions settle this before you sign: who assembles the draw package, what exact documents the landlord requires, how many days the landlord has to respond once it's submitted, and when the allowance expires.
Is the number on a contractor's proposal a price or an estimate?
Usually both, line by line. Some lines are fixed prices that don't move unless the scope moves. Others are allowances — placeholders that get trued up to actual cost once the real selection is made. A proposal presents them in the same column with the same dollar sign, and the total at the bottom reads as one number.
Ask every bidder, including us, three questions about their proposal:
- Which lines are fixed prices and which are allowances?
- What does each allowance assume — dollars per square foot for flooring, a specific fixture schedule, a grade of millwork?
- What happens when an allowance is exceeded? Change order, marked up or not, or absorbed?
Here's the part that cuts against our own interest: a proposal carrying more allowance lines can look lower than one that priced the same scope tightly. If you compare bottom lines, the vaguer proposal wins. The number worth comparing is the fixed portion, and the assumptions sitting underneath every allowance.
This connects back to the drawings. An estimator prices what the plan set shows. An incomplete set produces more allowances, more assumptions, and more items discovered in the field. If you're getting bids on a set that hasn't been through a constructability review, you're getting estimates dressed as prices. Commercial drawings developed with the build in mind reduce that gap, though they never close it entirely.
What gets added to your scope after you've already signed?
Two things, reliably: accessibility upgrades triggered by your own alteration, and equipment decisions that drive plumbing and electrical rough-in.
Accessibility comes first because it catches people who assume it doesn't apply to them. Under Section 11B-202.4 of the California Building Code (CBC), when you alter an area of an existing building, you also have to provide an accessible path of travel to that altered area — which includes the primary entrance, the route to your space, and the restrooms serving it. Moving walls, reconfiguring a suite, or remodeling a restaurant kitchen is an alteration. Under Exception 8, when the adjusted construction cost is at or below the state valuation threshold, path-of-travel spending is capped at 20% of that adjusted construction cost. For 2026 that threshold is $209,208, but it is adjusted annually and the calculation has its own definitions, so confirm the current figure and the treatment of your specific project with your architect or a Certified Access Specialist rather than relying on this paragraph. This is state code, so it applies in every Bay Area jurisdiction, though how each building department reviews it differs.
The lease question follows immediately: is that accessibility work landlord's work, allowance-eligible, or yours? It's a real number, it's triggered by your project, and it belongs in the work letter conversation rather than the construction one.
Equipment is the second one, and it's a sequencing problem rather than a cost trigger. In food service and medical space, the equipment you select determines where plumbing and electrical rough-in has to land. Select late and you're revising drawings that have already been permitted. Long-lead equipment can also outlast the construction schedule itself, which means the order date, not the install date, is the one that matters. In many California jurisdictions the environmental health department has to approve plans before the building department will issue a construction permit, and building, fire, and health each run on their own clock — a delay in one blocks the others. Confirm the sequence with your county before you build a schedule around it, because it isn't uniform across the Bay Area. This is a large part of what makes a restaurant build-out different from an equivalent square footage of office.
Who on your side can approve a change once work starts?
One person, named in writing before construction begins, with a stated dollar limit on what they can approve alone. If your contractor doesn't know who that is, they will act on the word of whoever answers the phone, and you'll find out which decisions that produced when you get the invoice.
Your construction contract almost certainly requires change orders in writing. Field pace works against that clause constantly — someone asks a question in a hallway, gets a verbal yes, and the work proceeds with an understanding that the paperwork will follow. When it doesn't follow, the dispute isn't really about the contract term. It's about whose account of a five-minute conversation is accurate, months later, with money attached. That argument is expensive regardless of who eventually wins it.
The fix costs nothing: any verbal direction gets confirmed the same day in writing. An email that says what was decided, what it changes, and roughly what it costs is enough to keep the record straight.
One related habit is worth naming, because tenants adopt it with good intentions. You talk to the general contractor. The general contractor talks to the subcontractors. When an owner goes directly to a subcontractor to add something small, that item usually gets built with no price attached, no change order, and no clear answer about who warranties it. Settling the communication path and the change-order procedure at the pre-construction kickoff meeting prevents most of it.
What to settle before you sign
Six items, all of them cheaper to resolve while the lease is still a draft:
- A responsibility matrix covering FF&E, cabling, security, and signage — who buys, who installs.
- What the improvement allowance can be spent on, how it's drawn, and when it expires.
- Which of your own acts count as Tenant Delay.
- How long the landlord has to respond at each approval step, and what happens if they don't.
- Whether accessibility path-of-travel work is landlord's work, allowance-eligible, or yours.
- Who on your side can authorize a change, and up to what amount.
This process runs well when you can describe the space you need and name one person who decides. If the scope is still open — you're weighing two floor plans, or the equipment package isn't chosen — that's worth resolving before the lease is signed rather than after, because the lease clock starts either way.
If you want a contractor reading the work letter with you before you sign it, that's the cheapest hour anyone will spend on the project.
_800x600%20(1).webp)