Assumed lease & lease assignment guides
Taking over a commercial lease means inheriting it as-is — its consent terms, its liabilities, and often its defaults. These source-cited guides cover the due diligence that matters before you close on an assignment, a business purchase, or a sublease.
Last reviewed: May 26, 2026 by the BizLeaseCheck Editorial Team. General information, not legal advice.
When you take over someone else’s lease, you inherit their obligations as-is. Here is the order to investigate what you are stepping into before you close.
Read guide Assumed-lease guideLease Assignment vs Sublease: What You InheritWhether you take a lease by assignment or sublease decides who your landlord really is — and how exposed you are.
Read guide Assumed-lease guideLandlord Consent & Recapture on Lease AssignmentMost commercial leases let the landlord block — or take back — the space when you try to take over. Read the consent and recapture clauses first.
Read guide Assumed-lease guideContinuing Liability & Novation in Lease AssignmentsAn assignment can leave you fully liable for the whole lease — and a plain assignment usually does not release the seller. A novation is what actually shifts liability.
Read guide Assumed-lease guideEstoppel Certificates in Lease Due DiligenceThe estoppel certificate is how you verify the lease you are inheriting actually matches reality — get it before you close.
Read guide Assumed-lease guideSNDA & Subordination When Assuming a LeaseIf the landlord’s lender forecloses, an SNDA is what keeps your inherited lease alive — confirm one exists before you take over.
Read guide Assumed-lease guideInheriting CAM & Operating Expenses on an Assumed LeaseWhen you take over a lease, you take over its CAM math — including a year-end true-up that can bill you for costs run up before you arrived.
Read guide Assumed-lease guideSecurity Deposit & Guaranty When Assuming a LeaseTaking over a lease can mean the landlord wants a fresh deposit and your personal guaranty — and the old deposit may not simply transfer.
Read guide Assumed-lease guideRemaining Term & Renewal Options on an Assumed LeaseYou are buying whatever term and options are left — confirm how much runway you have and whether the renewal rights actually transfer to you.
Read guide Assumed-lease guideInherited Defaults & Surrender Obligations on a LeaseWhen you take over a lease you can inherit its unpaid charges, its deferred maintenance, and the prior tenant’s obligation to restore the space at the end.
Read guide Assumed-lease guideUse Clause, Exclusives & Co-Tenancy on an Assumed LeaseA lease can be a great deal and still be useless to you if its use clause does not permit the business you plan to run.
Read guide Assumed-lease guideAssumed Lease Red Flags: A Buyer’s ChecklistA fast checklist of what most often goes wrong when you take over someone else’s commercial lease — grouped by consent, liability, and condition.
Read guideAssumed Lease (DD) Analysis
A representative assumed lease sample report — danger score 92/100, 8 red flags with verbatim evidence quotes, no signup needed.
Frequently asked questions
What is the difference between a lease assignment and a sublease?
An assignment transfers the entire remaining lease to you, so you deal directly with the landlord (privity of estate). A sublease leaves the original tenant as the master tenant and you rent from them — you have no direct contract with the landlord, so a master-lease default can end your sublease.
Do I inherit the original tenant’s liabilities?
Often yes. An assumption can cover the lease’s obligations and even existing defaults, and a plain assignment usually does not release the original tenant. Only a novation, with the landlord’s consent, substitutes you and releases them — so confirm what you are assuming and get a seller indemnity for the past.
Why is the estoppel certificate so important?
It is the landlord’s signed confirmation of the current rent, deposit, defaults, options, and side agreements — letting you verify the lease before you inherit it and binding the landlord to those facts. A clean, current estoppel should be a condition to closing.
Run due diligence before you close
Upload the lease you are assuming. The report flags landlord consent and recapture, the liability you inherit, the estoppel items to verify, CAM exposure, and existing defaults, each tied to a quote from the document.