How do I complete a commercial buildout step by step from lease signing to move-in in 2027?

The commercial deal in plain terms

Before a single wall goes up, the lease has already decided most of what your buildout will cost and how long it will take. Read the work letter — the exhibit attached to the lease that spells out who builds what — as carefully as you read the rent schedule, because it is the actual construction contract hiding inside a real estate document. This is the single highest-leverage hour of the entire project, and it happens before you are technically a tenant.

Delivery condition. "Cold shell" means bare structure: no HVAC distribution, no interior walls, sometimes no restrooms or finished floor slab. "Warm shell" or "vanilla box" typically means demised walls, a finished slab, base building HVAC brought to the space, one or two restrooms, and a lighting grid. "Second generation" means you inherit the last tenant's layout — sometimes a gift, often a demolition bill. The difference between cold shell and vanilla box on the same square footage can swing your buildout cost by $40–$80 per square foot. Get the delivery condition described in writing with specifics, not adjectives.

Tenant improvement allowance (TI). The landlord contributes a dollar amount per rentable square foot toward your buildout. In many markets a standard office deal lands somewhere in the $30–$80 per square foot range for a five-to-ten-year term; longer terms and stronger credit pull it higher, short terms and second-generation space pull it lower. Critically, TI is usually reimbursed, not advanced — you pay contractors, submit lien waivers and paid invoices, and the landlord funds within 30–45 days. That means you need working capital equal to the full TI amount for a month or two, even though you're not ultimately paying it.

What TI can be spent on. Landlords typically restrict TI to permanently affixed improvements: walls, doors, ceilings, mechanical, electrical, plumbing, flooring, millwork. Things you might want it for — furniture, cabling, security systems, signage, moving costs, your architect's fee — are often excluded or capped at a percentage (commonly 10–20% of the allowance for "soft costs"). Negotiate the soft-cost carve-out explicitly. If you don't, you'll discover in month four that the $150,000 you counted on can't touch your $60,000 data cabling bill.

Free rent and the commencement date. Rent commencement is usually triggered by the earlier of (a) substantial completion of your improvements, (b) your opening for business, or (c) a fixed outside date. That outside date is the one that hurts. If the lease says rent starts 120 days after delivery and your permit takes five months, you're paying rent on an empty construction site. Negotiate a permit contingency: rent commencement tolls day-for-day for delays caused by the municipality, not by you.

Who builds. Landlord-built (turnkey) means the landlord's contractor does the work to an agreed plan — less control, less risk, no cash flow strain, but you eat whatever finish level the landlord's standard specifies. Tenant-built means you hire the architect and general contractor, you control quality and schedule, and you carry the risk of overruns. Most tenants above about 5,000 square feet build their own. Below that, turnkey is often the better trade.

Landlord approvals and fees. Expect to submit drawings for landlord review (typically 10–15 business days per round), use landlord-approved subs for life safety and roof penetrations, and pay a construction management fee of roughly 1–5% of hard costs. That fee is negotiable and frequently waived for larger deals. Also confirm after-hours HVAC costs, freight elevator scheduling and fees, and whether you owe restoration — removal of your improvements at lease end. A restoration obligation on a heavily built-out space can be a six-figure liability you never see coming.

One more thing to settle before signing: get the base building documents. As-built drawings, existing mechanical and electrical capacity, structural loading, the roof warranty holder, and any ADA or fire-code deficiencies in the base building. If the building's electrical service can't support your server room or your kitchen equipment, you want to know that in due diligence, not after your architect has drawn a set of plans against the wrong assumptions.

How the buildout process flows

Here is the sequence from executed lease to occupied space. Each phase gates the next, and the two phases most often underestimated are permitting and long-lead equipment procurement. The word "complete" matters here in a specific sense: you do not complete a phase until its deliverable is signed off, because skipping ahead is how schedules collapse.

Step one, week one: assemble the team. You need an architect licensed in the jurisdiction, MEP engineers (mechanical, electrical, plumbing — sometimes the architect subcontracts them), and a decision about project delivery. If schedule matters more than lowest price, hire the general contractor early on a preconstruction basis so they price the design as it develops instead of after it's finished. Preconstruction services typically cost $5,000–$25,000 and routinely save more than that by catching a mechanical design the market can't build for your budget.

Step two: test fit and program. The architect drafts one or two layouts against your headcount, meeting-room needs, and any special spaces — lab, kitchen, server room, clean room, exam rooms. This is where you find out whether the space actually holds your program. Typical office density now runs 150–250 usable square feet per person for open plans, higher for private-office-heavy layouts. If the test fit says you need 20% more space, you want that news before the lease is signed, which is why serious tenants run a test fit during lease negotiation, not after.

Step three: design development and construction documents. DD locks the layout, finishes, and major systems. CDs are the permit-and-build set: dimensioned plans, reflected ceiling plans, MEP drawings, details, door and finish schedules, and specifications. Rushing CDs is the single most expensive false economy in a buildout — incomplete drawings become change orders, and change orders price at a premium because there's no competitive bid.

Step four: bid and award. Send a complete CD set to three to five general contractors with a clear bid form so numbers are comparable line by line. Require them to break out general conditions, fee, contingency, and allowances. A bid that's 15% below the others isn't a bargain — it's usually a scope gap, and you'll pay the difference in change orders. Level the bids in a spreadsheet, interview the two finalists including the actual superintendent who'll be on your job, and check references on projects of your size in the last 18 months.

Step five: permit. Submittal timing varies enormously by jurisdiction — anywhere from an over-the-counter same-day approval for a simple tenant improvement to four months in a slow or plan-check-heavy city. Health department, fire marshal, and ADA review run in parallel and each can bounce the set. Ask your architect and GC, before you commit to a schedule, how long this specific municipality has been taking this year. Not last year — this year.

Step six: construction. Demo, then rough-in (framing, ductwork, conduit, piping, low-voltage pathways), inspections, insulation, drywall, tape and paint, ceilings, flooring, trim, fixtures, final MEP connections. Walk the site weekly with the GC and your architect, and keep a running RFI and change-order log. Meeting minutes with dated decisions are your best defense in a schedule dispute.

Step seven: closeout and occupancy. Final inspections produce the Certificate of Occupancy — without it, you legally cannot occupy. Punch list is the list of incomplete or defective items generated in a joint walkthrough; withhold retainage (typically 5–10% of the contract) until it's cleared. Collect O&M manuals, warranties, as-built drawings, air balance reports, and final unconditional lien waivers from every sub before releasing final payment.

Step eight: move-in. Furniture, IT, phones, security and access control, signage, and the actual move happen after the CO in most jurisdictions, though many building departments allow a temporary CO or an early-access period for low-voltage and furniture install. Sequence this deliberately: furniture installers and cabling crews working around drywall dust cost more and produce worse results.

Costs per square foot, timelines, and ranges

Numbers vary hugely by market, scope, and building type, so treat these as planning ranges to be replaced with local bids as fast as possible. The commercial reality is that your second bid set will be sharper than your first, because you'll know what questions to ask.

Hard cost ranges by use type. Basic open-plan office in a second-generation space with light reconfiguration commonly lands in the $50–$100 per square foot range. Standard new office buildout in a vanilla box typically runs $100–$180. High-end office with premium finishes, extensive glass fronts, and heavy AV can exceed $250. Retail varies widely by concept — a simple boutique might sit near $80–$150, while a full-service restaurant with a commercial kitchen, grease interceptor, hood system, and dedicated make-up air routinely runs $250–$500 or more. Medical and dental space with lead shielding, medical gas, and specialty plumbing typically lands in the $150–$350 band. Warehouse office pods and light industrial finish are usually the cheapest per foot but carry expensive one-off items like dock equipment.

Soft costs. Architecture and engineering typically run 6–12% of hard costs on a tenant improvement, with the lower end on simple open plans and the higher end on complex or heavily engineered space. Permit and plan-check fees vary from a few thousand dollars to well over 1% of construction value. Add landlord construction management fee (1–5%), owner's contingency, and specialty consultants — acoustician, AV designer, kitchen consultant, lab planner — as scope demands.

Costs outside the construction contract. These are the line items that blow budgets because they never appear in the GC's number: furniture ($1,500–$5,000+ per workstation installed, more for private offices and conference rooms), data cabling and network gear, AV for conference rooms (a well-equipped medium room easily runs five figures), security and access control, signage including landlord- and city-approved exterior signage, appliances, and the move itself. Add these up before you set the total budget, not after.

Timeline ranges. Design through permit-ready CDs: 8–16 weeks for a straightforward office, longer for restaurant or medical. Bidding and award: 3–5 weeks. Permitting: 3 weeks to 4 months. Construction: roughly 10–16 weeks for a simple open-plan office under 10,000 square feet; 16–26 weeks for a complex or larger space; restaurants frequently push past 6 months once health department review and equipment lead times are counted. Closeout and move-in: 2–4 weeks. All in, a typical office buildout consumes 20–40 weeks from lease signing to occupancy, and you should assume the high end until your permit is in hand.

Long-lead items. Since 2021, equipment lead times have been the dominant schedule risk on many jobs. Electrical switchgear, transformers, and rooftop HVAC units have at times carried lead times measured in many months. Storefront and interior glass, custom millwork, specialty lighting, and commercial kitchen equipment all commonly require ordering long before they're installed. The practical move is to identify long-lead items during design development and release them for procurement early — often as a separate early-release purchase order — rather than waiting for the full contract award. Ask your GC for a written long-lead log at bid time, with quoted lead times, and update it monthly.

Contingency. Carry 10% owner's contingency on a well-documented new-construction shell and 15–20% in an older or second-generation building where you can't see behind the walls. Unknown conditions in existing buildings — undersized electrical service, asbestos-containing floor tile or mastic, non-compliant restrooms triggering ADA upgrades, structural surprises above the ceiling — are the normal case, not the exception.

Cash flow. Model it monthly. You'll pay design fees up front, a deposit or first draw to the GC, then monthly progress payments against a schedule of values with retainage held back. TI reimbursement lags all of it. Many tenants finance the gap with a line of credit or negotiate partial TI draws at 50% and 75% completion instead of one lump payment at the end — worth asking for during lease negotiation, when you still have leverage.

Where budgets and schedules slip

Buildouts rarely fail for exotic reasons. The same handful of problems recur across office, retail, medical, and industrial projects. Recognizing them in advance is most of the defense.

Signing before the test fit. You commit to 12,000 square feet, then discover the column grid, core location, and egress requirements mean your program needs 14,500. Now you're either cramming or amending the lease. Run the test fit during negotiation. It costs a few thousand dollars and it's the highest-return money in the whole process.

Assuming the delivery condition. "Landlord will deliver the premises in shell condition" without a definitions exhibit is an invitation to a dispute. Insist on a written scope: slab condition and levelness tolerance, demising wall construction and finish, HVAC capacity delivered to the space and whether distribution is included, electrical service size and panel location, sprinkler main and head count, restroom count and ADA compliance, ceiling grid, and window coverings. Every item you don't list becomes your cost.

Under-forecasting permit time. Teams routinely plan around the best case and then compress construction to make up for it, which converts schedule pressure into overtime premiums and quality problems. Call the building department, or have your architect do it, and ask about current plan-check backlog before you publish a schedule anyone relies on.

Late long-lead procurement. Waiting for a fully permitted set before ordering switchgear or rooftop units can add months. Release long-lead items early, accept a modest risk of a design change, and document that risk in writing so the decision is a considered one.

Change orders from incomplete drawings. Every ambiguity in the CD set becomes a field question, and field questions priced without competition cost more. A complete, coordinated set — architectural, structural, and MEP drawings actually checked against each other for clashes — is worth paying an extra two weeks of design time for.

Scope creep during construction. The founder walks the site in week six and wants a bigger conference room. That's a wall move, plus ductwork, plus sprinkler heads, plus a lighting revision, plus a two-week delay. Establish a single decision-maker and a written change-order threshold — anything over a set dollar amount requires that person's signature — before demo starts.

Existing conditions in older buildings. Hazardous materials surveys, undersized services, non-compliant paths of travel, and structural mysteries above the ceiling all cost time. Budget for a pre-lease site investigation, including selective demolition to open the ceiling and one wall, if the building predates the 1990s.

ADA and accessibility triggers. In many jurisdictions, a tenant improvement above a certain value or scope triggers accessibility upgrades to the path of travel — entrance, route to the space, restrooms, drinking fountains, signage. Those upgrades can land outside your leased premises and become a negotiation with the landlord about who pays. Ask your architect to flag this during design development.

Landlord approval loops. Two rounds of landlord review at 10–15 business days each is a month of calendar you must show on the schedule. Submit early, submit complete, and get the landlord's construction contact's name and direct line during lease negotiation.

Utility and service coordination. New electrical service, gas service, or a fiber circuit can carry lead times independent of construction. Fiber installs in particular have surprised many tenants with multi-month timelines when the building lacks existing carrier presence. Order circuits the week the lease is signed.

Weak closeout. Releasing final payment before you hold unconditional lien waivers, warranties, and as-builts is how tenants end up with a mechanic's lien on a leasehold and no documentation of what's above their ceiling. Make the closeout package a condition of final payment in the contract, listed item by item.

Adjacent scenarios worth planning the same way. A subleased space typically means you inherit whatever the sublandlord built and need the prime landlord's consent for any change — build the consent timeline into your schedule. A phased occupancy, where you move into half the floor while the rest is under construction, requires a temporary CO, a construction barrier meeting fire-code separation, and a dust and noise plan; it is workable but adds cost. A restoration obligation at lease end deserves a reserve set aside from year one. And if you're building out multiple locations, standardize a prototype drawing set and a preferred vendor list — the second location should cost less and move faster than the first, and if it doesn't, the process is the problem, not the market.

Decision framework

Use this to decide how to structure the project before you commit to a delivery method. The framework below assumes you have already confirmed the delivery condition in writing and know your TI structure.

Turnkey versus tenant-built. Turnkey shifts execution risk to the landlord and eliminates your cash flow gap, but you give up control over finish level and schedule priority — you're one of several projects in the landlord's contractor's queue. Tenant-built gives you control and any savings under the allowance (sometimes convertible to free rent), at the cost of carrying overrun risk and float. The crossover point is roughly where your requirements stop matching the building standard: a specialty space, a brand-driven retail environment, or a lab is almost always tenant-built.

Hard bid versus design-assist. Hard bidding complete CDs to five contractors gets the sharpest price when the drawings are truly complete and the scope is conventional. Design-assist — bringing the GC and key subs in during DD — gets a better schedule, fewer surprises, and real-time cost feedback, at the cost of a less competitive fee. Complex mechanical, tight schedules, and existing-building unknowns all point toward design-assist.

Contract type. Stipulated sum (fixed price) is simplest and shifts risk to the GC, who prices that risk into the number. Cost-plus with a guaranteed maximum price gives you visibility into actual costs, shared savings, and the ability to start before drawings are 100% complete — but it requires you to actually read monthly cost reports. On a first buildout under 10,000 square feet, stipulated sum against complete drawings is usually the right call.

A working checklist for the first 30 days after signing. Order utility and fiber circuits. Engage architect and engineers. Commission a test fit if you haven't. Request base building as-builts and the landlord's construction rules. Confirm the landlord's construction contact and approval turnaround in writing. Get a hazardous materials report if the building is older. Ask the building department about current plan-check timelines. Draft the long-lead item list. Set the budget with contingency and the out-of-contract items included. Identify your single internal decision-maker. Do those ten things in month one and the rest of the project gets dramatically easier.

Sequencing the move-in itself. Once the CO is issued, the final week is logistics, not construction. Schedule cabling and network cutover before furniture, or you'll be pulling cable under desks that are already installed. Bring security and access control online before the first employee badge is issued. Confirm the freight elevator reservation with building management, because two vendors showing up at the same loading dock on the same morning is a real and common failure. Test the AV in every conference room before the first meeting, not during it.

Related questions

What is a tenant improvement allowance and how is it paid?

It's a landlord contribution toward your buildout, quoted per rentable square foot. It's normally reimbursed after completion against paid invoices and lien waivers, funding in roughly 30–45 days — so plan to front the cash. Negotiate partial draws at milestones if cash flow is tight.

Do I need a general contractor or can I hire trades directly?

For anything requiring a permit, hire a licensed general contractor. They carry the permit, coordinate inspections, manage subs, and hold insurance and bonding. Self-managing trades on a permitted commercial job exposes you to lien, insurance, and code-compliance risk that dwarfs the fee you save.

How long does a commercial permit take?

Anywhere from same-day over-the-counter for minor work to four months in a heavily backlogged jurisdiction. Restaurants and medical uses take longest because health department and specialty reviews stack on top of building plan check. Ask your architect for this year's local turnaround, not a general average.

What happens if construction runs past my rent commencement date?

You pay rent on an unfinished space unless the lease says otherwise. Negotiate rent commencement tied to substantial completion, with day-for-day tolling for landlord-caused and permitting delays. An outside date with no tolling is the clause that turns a delay into a five-figure problem.

Can I move in before the Certificate of Occupancy?

Generally no — occupying without a CO is a code violation and can void insurance. Some jurisdictions issue a temporary CO allowing occupancy with minor punch items outstanding, and many allow early access for furniture, cabling, and equipment before final sign-off. Confirm locally.

FAQ

How do I complete a commercial buildout step by step from lease signing to move-in?

Assemble the design team in week one, run a test fit, complete design development and construction documents, get landlord approval, submit for permit, bid the job to three to five general contractors and award, order long-lead equipment early, build through rough-in and finishes, pass final inspections for the Certificate of Occupancy, clear the punch list, then install furniture, IT, and security before moving in. Expect 20–40 weeks total.

What should I negotiate in the lease to protect the buildout?

A written delivery-condition exhibit, a defined tenant improvement allowance with a soft-cost carve-out, rent commencement tied to substantial completion with permitting-delay tolling, capped or waived landlord construction management fees, defined landlord approval turnaround times, early access for furniture and cabling, and a clear statement of any end-of-term restoration obligation.

How much contingency should I carry?

Ten percent in a new, well-documented shell where conditions are visible and drawings are reliable. Fifteen to twenty percent in an older or second-generation building, where undersized services, hazardous materials, and ADA path-of-travel triggers are common. Contingency is for unknowns, not for scope you decided to add later — track those separately.

What are the biggest schedule risks?

Permit review duration, long-lead equipment procurement, incomplete construction documents generating change orders, landlord approval cycles, and unknown existing conditions in older buildings. Utility and fiber installation can also run independently of construction and has stranded otherwise finished spaces.

Should I hire a project manager or owner's representative?

If the project exceeds roughly 10,000 square feet, involves specialty systems, or your team has no construction experience, yes. Fees commonly run a few percent of project cost, and a competent owner's rep typically pays for themselves in bid leveling, change-order discipline, and schedule enforcement. Smaller conventional office jobs can often be run internally with a good architect and GC.

What do I need to collect at closeout?

Certificate of Occupancy, signed punch list, final unconditional lien waivers from the GC and every subcontractor, as-built drawings, O&M manuals, equipment warranties, the HVAC air balance report, fire alarm and sprinkler certifications, access-control credentials and admin logins, and any keys or fobs. Make delivery of this package a condition of final payment.

Sources

• https://www.bomi.org/
• https://www.aia.org/resources/6076-owner-contractor-agreement-documents
• https://www.usgbc.org/
• https://www.ada.gov/resources/small-entity-primer/
• https://www.iccsafe.org/
• https://www.osha.gov/construction
• https://www.nfpa.org/codes-and-standards
• https://www.sba.gov/business-guide/manage-your-business/buy-assets-equipment
• https://www.energy.gov/eere/buildings/commercial-buildings-integration
• https://www.irs.gov/publications/p535

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