The short answer
A single-tenant NNN building is real property under Treas. Reg. §1.1031(a)-3, so the whole sale price can go through a qualified intermediary into any other real estate, including a net-lease DST. The tax you defer is unrecaptured §1250 gain at a maximum 25% on straight-line depreciation, 15% or 20% capital gain on the rest, and the 3.8% net investment income tax. What is specific to NNN is timing: the buyer prices the remaining lease term and tenant credit, and a tenant right of first refusal, a lender consent or a lease expiry can eat into your 45- and 180-day windows if the sale sequence is not planned.
At a glance
| Property class | Stores are listed buildings under Reg. §1.1031(a)-3(a)(2)(ii)(B) |
|---|---|
| Recapture rate | Unrecaptured §1250 gain taxed at a maximum 25% (tax year 2025) |
| NIIT | 3.8% above $200,000 single / $250,000 joint modified AGI |
| Leasehold rule | A leasehold with 30+ years to run is like-kind to a fee (Reg. §1.1031(a)-1(c)) |
| Identification | 3 properties of any value, or any number within 200% of the sale price, by day 45 |
| DST constraint | Rev. Rul. 2004-86: trustee cannot renegotiate or sign new leases |
The building, the land and the lease itself are all real property, so the whole price can be exchanged
A single-tenant net-lease sale is the cleanest kind of exchange because everything you convey is on the real property lists in Treas. Reg. §1.1031(a)-3: stores and other buildings, paved parking, outdoor lighting and fences are named inherently permanent structures, and the HVAC, wiring and fire-suppression systems are named structural components. The lease you assign to the buyer is not a separate taxable asset; a leasehold is listed among the intangible interests that count as real property.
The tenant's trade fixtures, signage and equipment belong to the tenant and never touch your settlement statement, which is why NNN sellers rarely face the personal-property split that hotel or warehouse sellers do. Since 2018 only real property qualifies, so if you happen to own the rooftop units or a pylon sign and the contract prices them separately, that slice is a taxable sale outside the exchange.
Ground-lease variants change the analysis. If you own the land under a tenant-built store, you are selling a fee and the rule above applies; if you own the building on someone else's land, your leasehold must have 30 years or more to run on the closing date to be like-kind to a fee under Reg. §1.1031(a)-1(c), a problem worked through on the leasehold interest page.
Buyers price the remaining term and the credit; the IRS prices your depreciation
Net-lease value is net operating income divided by a cap rate, and the cap rate is mostly a verdict on how long and how surely the rent continues. Hypothetically, a building paying $120,000 of NNN rent is worth $2,000,000 at a 6.0% cap rate and about $1,714,000 at 7.0%, so one percentage point of cap rate moves the price by roughly 14%.
Your federal tax has three layers, shown with round numbers: you paid $1,500,000 ten years ago with $1,200,000 allocated to the building, took about $300,000 of straight-line depreciation over 39 years, and sell for $2,000,000. The $800,000 gain splits into $300,000 of unrecaptured §1250 gain taxed at a maximum 25% (Topic 409), $500,000 of long-term capital gain at 15% or 20%, and a 3.8% net investment income tax on the full $800,000 once income passes the $200,000 single or $250,000 joint thresholds: about $205,000 before state tax.
A complete exchange defers all three layers, and the unrecaptured §1250 amount carries into the replacement property instead of disappearing, under the like-kind rules in Publication 544.
- Remaining primary term: a lease with 12 years left trades differently from the same lease with 4 years left
- Rent escalations: fixed bumps every five years versus flat rent for the term
- Who signs: a corporate parent guaranty versus a single-unit franchisee
- Renewal options and whether the tenant has already exercised one
- Landlord duties that survive in a so-called NNN lease, such as roof and structure
A right of first refusal or a loan assumption can consume your 45 days before you list
The 45-day identification and 180-day exchange periods run from the day the relinquished property closes, and nothing in the lease pauses them. What NNN leases add are pre-closing steps that stretch the contract period and, if mishandled, push the closing into a quarter you did not plan for.
Read the lease for a tenant right of first refusal or first offer, the estoppel certificate the buyer's lender will require, and any consent the tenant holds over assignment. On the debt side, a loan the buyer will assume or a lockout that forces a payoff adds lender processing time; either way the qualified intermediary agreement must be signed before the sale closes, not after.
- Order the estoppel early; a tenant that takes 30 days to return it delays the buyer's lender, not your deadlines
- If the tenant holds a ROFR, treat the buyer's offer as the trigger and expect a second round before you sign
- Line up replacement candidates, including a DST backup, while the buyer is still in due diligence
If the tenant leaves at expiry, the vacant box is still investment property and still exchangeable
A vacant building does not lose its status as property held for investment; the regulation asks how the property is held, not whether it is producing rent this month. You can re-lease and then sell on a cap rate, or sell vacant on a price-per-square-foot basis and exchange the smaller proceeds; both are exchanges.
The trap is changing the holding purpose. Splitting the parcel into lots for resale, or a quick flip after a purchase, invites the exclusion for property held primarily for sale, so keep the property leased or marketed as an investment and let the record show it, as explained under eligibility requirements.
Direct NNN replacement or a net-lease DST: what you give up and what you get
Owning the next building yourself means you choose the tenant and the lease, you can refinance, and you can sell when you want; it also means one tenant, one roof and one lease expiry. A net-lease DST replaces that with a fractional interest in several buildings and tenants, closes in days rather than months, and takes the management off your hands, subject to the limits Rev. Rul. 2004-86 imposes: the trustee cannot renegotiate the lease or enter new leases except in a tenant bankruptcy.
Breakwater Exchange is a 1031 exchange broker that works with vetted national DST sponsors, and the trade-offs are worked through in detail on DST vs direct NNN property, single-tenant vs portfolio DSTs and the triple-net recommendations page.
- Direct: control and financing flexibility; concentrated tenant risk; you carry the re-leasing cost
- DST: diversification across tenants and states; no lease decisions available to you; sponsor fees and a hold you do not control
- Both: real property, both like-kind, both must be identified within 45 days
Underwriting checklist before you exchange into a QSR, drugstore or auto-service box
Whichever route you take, the lease is the asset; underwrite it with the same care you gave your own. Have your CPA or attorney confirm the rules and the numbers below before you identify.
- Lease abstract: commencement, expiration, options, bumps, ROFR, assignment rights, landlord obligations
- Tenant credit: public filings or franchisee financials, guaranty scope, unit-level sales if the lease requires reporting
- Re-tenanting math: what the box rents for to a second-generation user and what conversion costs
- Site: traffic counts, access, co-tenancy on the corridor, replacement cost per square foot
- Environmental: a Phase I on any auto-service, oil-change or fuel site
- Rent versus market: above-market rent inflates the cap-rate price and evaporates at renewal
Related questions
Can I split one NNN sale into several replacement properties?
Yes. You may identify up to three properties of any value, or any number whose total value stays within 200% of what you sold, under Reg. §1.1031(k)-1(c)(4), and DST interests can be sized to use up the last dollars.
Does a corporate guaranty on the lease change how the sale is taxed?
No. Tenant credit changes the price a buyer pays and the risk you carry, but the gain, recapture and NIIT computations are the same as for any building.
My tenant wants to buy the building. Can I still exchange?
Yes, a sale to your tenant is a sale like any other; the related-party restrictions in §1031(f) matter only if the tenant is a related person to you.
My ground lease has 20 years left. Can I exchange it for a fee-simple building?
Not as like-kind: a leasehold needs 30 years or more to run to be exchanged for a fee under Reg. §1.1031(a)-1(c).
Is a NNN building held in a DST really the same as owning one?
For §1031 purposes a properly structured DST interest is treated as ownership of the underlying real estate under Rev. Rul. 2004-86; economically you hold a fractional, passive interest with sponsor fees, covered on what you own in a DST.
Sources
Checked against these publications on September 19, 2026. Rules and figures change; confirm the current version with your CPA or attorney before you act. This page is general information, not tax or legal advice.
- Treas. Reg. §1.1031(a)-3, Definition of real property
- Treas. Reg. §1.1031(a)-1, Property held for productive use or investment (30-year leasehold rule)
- Treas. Reg. §1.1031(k)-1, Deferred exchange identification rules
- IRS Publication 544, Sales and Other Dispositions of Assets
- IRS Topic 409, Capital gains and losses (25% unrecaptured §1250 rate)
- IRS Topic 559, Net investment income tax
- Rev. Rul. 2004-86, Delaware statutory trusts and §1031
