What Is a Build-to-Suit Lease?

The BTS Structure

A build-to-suit lease is an arrangement where a developer acquires land, constructs a building to a specific tenant's specifications, and then leases the completed facility to that tenant under a long-term lease. The tenant does not own the building — they are a tenant throughout the lease term, paying rent that effectively amortizes the developer's project cost plus a profit margin. The developer owns the asset and benefits from both the income stream (rent) and the residual value of the property at the end of the lease term.

The BTS process typically follows this sequence:

Who Uses Build-to-Suit Leases?

BTS leases are most common among users whose operational requirements make adaptation of existing space impractical or economically inefficient:

How Developer Profit Is Embedded in BTS Rent

The BTS Rent Formula

Unlike market rent (which is set by supply and demand for comparable space), BTS rent is fundamentally a financial calculation: the developer needs the rent to (1) service the construction loan during the building phase, (2) recover all project costs (land, hard construction, soft costs, financing) over the lease term, and (3) generate a target return on equity investment. This is why BTS rents are not "market rents" in any traditional sense — they are project-return rents.

The basic BTS rent calculation:

Example: A 20,000 sf industrial facility with total project cost of $3.5M and a developer targeting a 7.5% yield on cost requires $262,500/year in rent — or $13.13/sf NNN. If comparable second-generation space in the same market rents for $10/sf NNN, the BTS premium is $3.13/sf. Over a 20-year term: $3.13 × 20,000 × 20 = $1,252,000 total premium. That's the cost of getting a brand-new purpose-built facility instead of adapting existing space with TI.

The Real $4M BTS Rent Premium Math

Build-to-Suit vs. Second-Gen Space: 20-Year Premium Analysis
SCENARIO:
Property type: Class A office/R&D flex, suburban market
Size: 20,000 sf
Lease term (BTS): 20 years
Lease term (second-gen): 10 years (market standard)

BUILD-TO-SUIT:
Annual rent: $45/sf NNN
Annual rent obligation: $45 × 20,000 = $900,000/yr
20-year total rent: $900,000 × 20 = $18,000,000
Estimated rent escalation: 3%/yr compounding
20-year NPV of rent (6% discount rate): ~$10,320,000

SECOND-GENERATION SPACE:
Annual rent: $35/sf NNN (Year 1)
Annual rent obligation: $35 × 20,000 = $700,000/yr
10-year total rent: ~$8,200,000 (with 3%/yr escalation)
Second lease (Yr 11–20): Assume $42/sf (market +20%)
Second 10-yr total rent: ~$9,900,000
20-year total second-gen: ~$18,100,000
20-year NPV of second-gen: ~$8,050,000

PREMIUM ANALYSIS (undiscounted):
BTS Annual premium Year 1: $45 - $35 = $10/sf
Annual premium: $10 × 20,000 sf = $200,000/yr
20-year total premium: $200,000 × 20 = $4,000,000

BTS ADVANTAGES (economic offsets):
No TI buildout cost (second-gen): ($450,000) savings
No relocation at Year 10: ($180,000) savings
Operational efficiency from custom spec: ~$75,000/yr est.
20-yr operational savings: $1,500,000

NET BTS PREMIUM AFTER OFFSETS: ~$1,870,000
Annual equivalent: ~$93,500/yr

CONCLUSION: BTS premium is justified only if the custom
facility generates > $93,500/yr in operational or revenue
advantage over adapted second-generation space.

The Three Space Types: BTS, Second-Gen, and New Spec

Second-Generation Space

Second-generation (second-gen) space is previously occupied commercial space that has been vacated by its prior tenant. The space comes with existing improvements — walls, ceilings, HVAC, plumbing, electrical, restrooms — that may range from highly useful (a prior occupant with similar space needs) to actively obstructive (a prior restaurant with a full commercial kitchen in the middle of your proposed open-plan office). Second-gen space is the dominant deal type in most commercial markets by unit count, and it is where the most aggressive negotiating leverage typically lives: the landlord has an empty space generating no income and wants to stabilize it.

Key characteristics of second-gen space transactions:

New Spec Space

New spec (speculative) space is a newly constructed building that has been built without a committed tenant — the developer is speculating that tenants will emerge to occupy the space after construction. New spec space offers the advantage of modern construction (better energy efficiency, higher clear heights in industrial, more flexible open-plan office floors) without the BTS commitment or premium. However, spec space is designed to appeal to a wide range of tenants, not custom-built for any specific user, so there are limits to how perfectly it can be adapted.

8-Dimension Comparison: BTS vs. Second-Gen vs. New Spec

Dimension Build-to-Suit Second-Gen Space New Spec Space
Rent level Above market; reflects project cost + developer return At or below market; landlord motivated to stabilize At or slightly above market; new construction commands premium
Lease term 15–25 years; required to amortize development cost 5–10 years; market standard 7–15 years; developer wants long-term credit
Customization Complete; tenant specifies every element Limited to TI allowance budget and existing structure Moderate; open floor plate but fixed structural elements
Occupancy timeline 18–30 months; construction lead time required 3–9 months; permit and TI buildout period 0–12 months; may be ready or in late construction
TI allowance Not applicable; developer funds full construction Highly negotiable; $40–$150/sf typical Moderate; $25–$80/sf typical
Flexibility / exit options Minimal; long term, high termination penalty Better; shorter term, renewal options, sublease rights Moderate; term and renewal rights negotiable
Condition of space Brand-new, purpose-built, no deferred maintenance Prior-tenant improvements; may require gut renovation Brand-new shell; requires tenant buildout
Developer profit embedded in rent Yes — full development cost + profit in base rent No — rent reflects market for existing asset Partial — new construction cost in rent, but market-competitive

The BTS Lease Structure: Key Provisions

The Ground Lease vs. Fee Simple BTS

BTS leases are structured in two primary ways. In a fee simple BTS, the developer owns the land and the building, and the tenant leases both. In a ground lease BTS, the tenant (or another party) owns or controls the land, and the developer builds and leases the improvements. Ground lease BTS structures are common in retail (fast food, banks, drug stores) where the operator values the ability to own the land for long-term site control. For most industrial and office BTS transactions, the developer owns both land and building under a fee simple structure.

Work Letter: The Most Critical BTS Document

The work letter is the heart of any BTS lease — it is the document that specifies exactly what the developer is obligated to build. A vague work letter is a source of enormous dispute. A well-drafted work letter specifies:

Termination Rights in BTS Leases

Because BTS leases run 15–25 years and the developer has invested $5–$50M+ in a purpose-built facility, termination rights for the tenant are typically very restricted or non-existent. Standard BTS lease provisions regarding termination include:

When BTS Makes Sense — and When It Doesn't

BTS Makes Sense When:

Existing Space (Second-Gen or Spec) Makes Sense When:

The flexibility premium: The value of a 5-year lease with two 5-year renewal options (versus a 20-year locked BTS lease) is not just the rent savings — it's the option value of being able to relocate if your business model changes, if a better site becomes available, or if the market shifts in your favor. For most growing or evolving businesses, that flexibility is worth significant economic value that doesn't appear in a simple rent comparison.

6 Red Flags in Build-to-Suit Transactions

🛑 Red Flag 1: Vague Work Letter Without Attached Plans and Specifications

A BTS work letter that describes the building as "a 20,000 sf office building consistent with Class A office standards in the market" without attached plans and specifications is a dispute waiting to happen. "Class A standards" means different things to different developers — it does not define HVAC capacity, floor-to-ceiling height, electrical service, finish levels, or dozens of other elements that matter to the tenant's operations. Require fully developed schematic design documents (or at minimum detailed design development drawings) to be attached as exhibits to the work letter before signing. The work letter must be specific enough that a court could determine whether the completed building complies.

🛑 Red Flag 2: No Completion Deadline or Inadequate Delay Remedy

A BTS lease with no substantial completion deadline — or with a delay remedy limited to "extending the rent commencement date" — gives the developer no financial incentive to complete on time. A tenant whose business plan depends on a specific opening date (a restaurant launch, a warehouse operational date tied to a logistics contract, a hospital expansion) needs meaningful delay remedies: per-day liquidated damages for each day of delay beyond the outside completion date, and a termination right if the delay exceeds a defined threshold (typically 6–12 months). "Rent free for delay days" compensates the tenant only for direct rent; it does not compensate for business losses from a delayed opening.

🛑 Red Flag 3: Rent Set Based on Construction Cost Estimate, Not Fixed Contract

Some BTS leases are signed with rent based on a construction cost estimate rather than a fixed-price contract. If construction costs escalate (as they have dramatically in recent years), the developer may have the right to increase the rent to maintain their target yield on cost. This is known as a "floating rent" BTS structure. Any BTS lease with rent adjustment rights tied to construction cost escalation is a significant risk to the tenant — a 15–20% construction cost overrun on a $5M project = $750K–$1M in additional cost that the developer will seek to recover through higher rent over the term. Require the BTS rent to be fixed once a guaranteed maximum price (GMP) construction contract is executed, with developer bearing cost overrun risk above the GMP.

🛑 Red Flag 4: 20-Year Term With No Flexibility — Business Plan Doesn't Support It

A 20-year BTS lease commitment from a company with a 3-year financial model and significant technology or market disruption risk is a mismatch between asset duration and business certainty. Before committing to any BTS lease term over 15 years, the tenant's leadership team should honestly assess: is this business likely to need this specific facility for this entire term? Are there reasonable scenarios where the business model changes, the facility requirements change, or the geographic market changes in ways that make a 20-year commitment in this location a liability rather than an asset? The answer for many tenants — including sophisticated ones — is yes, and yet BTS commitments are signed without that analysis being done rigorously.

🛑 Red Flag 5: No Tenant Right to Purchase at Fair Market Value

Many BTS tenants, having paid above-market rent for 15–20 years, find at the end of the initial term that the building's value has been substantially created by their own rent payments — yet they own nothing. A right to purchase the property at fair market value at the end of the initial term (or a right of first offer when the developer decides to sell) can be enormously valuable in markets where the building has appreciated. Negotiate a purchase option or right of first offer into any long-term BTS lease. Some tenants negotiate a purchase price formula (cost plus a fixed return) rather than fair market value, which can be even more valuable if the market has risen sharply during the lease term.

🛑 Red Flag 6: Change Order Process Gives Developer Unilateral Cost Control

A BTS work letter that allows the developer to approve or reject all change orders at their sole discretion, or that prices change orders at cost plus an unlimited developer markup, gives the developer significant leverage over any modification to the approved scope. Once a tenant is committed to a BTS and wants to change the specification — even for operational reasons discovered during construction — an unfavorable change order clause means paying a significant premium for modifications. Negotiate change order pricing at cost plus a defined markup (typically 10–15%) and require the developer to provide change order pricing within a defined timeframe (10–15 business days) to prevent delay-by-pricing.

✅ 12-Item Build-to-Suit Lease Evaluation Checklist

  1. Run the 20-year rent premium math before committing — calculate total BTS rent versus comparable existing space rent over the full term; determine the annual operational advantage required to justify the premium.
  2. Assess business plan certainty for the full BTS term — is your business model stable enough to support a 15–25 year commitment? Document the analysis; it's a board-level decision.
  3. Require fully developed design documents attached to the work letter — schematic or design development drawings and specifications; not a written description of standards.
  4. Fix the rent to a GMP construction contract — not a cost estimate; require the developer to bear cost overrun risk above the GMP.
  5. Negotiate a construction completion deadline with meaningful delay remedies — liquidated damages per day of delay plus a termination right if delay exceeds 6–12 months.
  6. Require a change order process with defined pricing and timelines — cost plus a fixed markup; 10–15 business day pricing turnaround; tenant approval required for any scope change.
  7. Negotiate a purchase option or right of first offer — at fair market value or a formula price; can be enormously valuable after 15–20 years of rent payments.
  8. Analyze termination right economics if any flexibility is desired — negotiate a termination right even if the payment is significant; price the option before signing so you understand the cost of flexibility.
  9. Compare BTS economics against design-build ownership — if the tenant is creditworthy enough to attract favorable BTS financing, they may be creditworthy enough to own the asset via SBA 504 or owner-occupied commercial mortgage.
  10. Negotiate renewal options with fixed-rate or capped rent — avoid renewal options that reset to full fair market value if you've built a highly customized facility where market comparables are difficult to establish.
  11. Review punch list and warranty provisions carefully — BTS leases should include a 1-year comprehensive warranty on all construction work plus longer warranties for structural elements (10 years) and major MEP systems (2–5 years).
  12. Confirm permitting risk allocation — who bears the risk if the project cannot be permitted for the tenant's specific use? Require landlord to represent that the site is suitable for the intended use and zoning permits the proposed BTS construction before committing.

Frequently Asked Questions

What is a build-to-suit lease?
A build-to-suit (BTS) lease is an arrangement where a developer constructs a building specifically to a tenant's custom specifications, then leases the completed facility to that tenant under a long-term lease (typically 15–25 years). The tenant pays rent that amortizes the developer's project cost plus a profit margin. BTS is common for users with highly specific facility requirements: distribution centers, manufacturing plants, medical/surgical facilities, headquarters campuses, and single-tenant retail prototypes. The tenant gets exactly the space they need; the developer gets a long-term credit lease secured by a purpose-built asset.
Why are build-to-suit rents higher than market rent for existing space?
BTS rents must recover the developer's total project cost (land, construction, soft costs, financing) plus a profit margin — all amortized through rent over the lease term. The developer targets a yield on cost (typically current market cap rate + 50–150 basis points), and the required annual rent is the total project cost multiplied by that yield. On a $5M facility with a 7% yield target, the developer needs $350,000/year in rent — which may be $10–$15/sf above market rent for comparable existing space. The rent premium is the price of custom specifications, guaranteed delivery, and no competition for occupancy.
What lease term is required for a build-to-suit?
BTS leases typically require initial terms of 15–25 years because the developer must amortize a large upfront construction cost through rent collections. For purpose-built or highly specialized facilities (food production, data centers, cold storage), the developer's residual value assumption is low because the asset has few alternate users — making a long initial term essential to the developer's return. Shorter initial terms (10–12 years) are possible with above-market rent or significant tenant credit enhancements, but they are not the developer's preference and typically result in a higher per-year rent.
What is second-generation commercial space?
Second-generation (second-gen) space is previously occupied commercial space available for a new tenant after the prior occupant has vacated. It has existing improvements (walls, HVAC, electrical, restrooms) that may be useful or may need modification. Second-gen space typically commands below-market rent because it requires updating, but landlords often offer generous TI allowances ($50–$150/sf) to neutralize the buildout cost. Occupancy timeline is 3–9 months after signing. Lease terms are 5–10 years with negotiable renewal options. Second-gen deals offer the most negotiating leverage of any space type because the landlord wants to stabilize a vacant asset.
What is the difference between a build-to-suit and a design-build?
In a build-to-suit, the developer owns the land and building, and the tenant occupies under a long-term lease — never owning the asset. In a design-build, a general contractor designs and constructs a building to the owner's (or tenant's) specification, with the owner taking title to the completed asset. Tenants who want to own their facility, or who have access to favorable financing (SBA 504, owner-occupied commercial mortgage), should consider design-build or owner-user purchase rather than BTS. BTS is structurally a long-term rental arrangement; design-build is a construction delivery method that can result in ownership.
When does a build-to-suit make sense despite the rent premium?
BTS makes sense when: no existing space can meet operational requirements through TI; the custom specification delivers a measurable operational advantage (lower per-unit logistics cost, higher manufacturing throughput, revenue uplift from a designed retail prototype) that exceeds the rent premium; the tenant's business has a stable 15–25 year geographic commitment; and the tenant is creditworthy enough that their lease credit reduces the developer's financing cost and therefore the required rent. BTS does not make sense for businesses with uncertain long-term space needs, businesses that need flexibility to relocate, or tenants whose space requirements can be met through TI in existing space.

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