Free Lease Extension Addendum Forms (Word)
Lease
by colettedupont
When a lease is ending but both sides want to continue, a lease extension addendum updates the dates and terms without drafting a whole new contract. This collection of 45 templates helps landlords, tenants, and property managers extend a rental cleanly, recording the new end date, any rent changes, and the terms that carry over from the original lease.
Each template is editable in Microsoft Word, ready for you to fill in names, dates, and the revised rent. Attach it to the existing lease, have both parties sign, and keep copies on file. Landlord-tenant rules vary by state, so confirm local requirements before finalizing. Download the addendum that fits your situation and renew the lease without the hassle.
When to use this Lease Extension Addendum template
- A property manager needs to extend a 12-month lease for a commercial tenant whose business is thriving in a downtown unit, requiring documentation of a new 24-month term with a 5% rent increase while keeping all original tenant improvement clauses intact.
- A landlord and tenant agree to extend a residential lease by 18 months after the original tenant faces a job relocation delay, needing a template that clearly outlines the new end date and confirms all existing pet policies and parking arrangements remain unchanged.
- A small business owner leasing retail space wants to add a 3-year extension to their lease but needs to adjust the rent by $200/month, using a template that specifies which original clauses (like maintenance responsibilities) stay the same and which (like insurance requirements) are being updated.
- A tenant in a furnished apartment requests a lease extension after their lease expires, but the landlord wants to modify the security deposit terms, so they need a template that highlights the new deposit amount while preserving all other provisions from the original agreement.
Which format should I download?
All templates in this collection are available exclusively in Microsoft Word format. This format is ideal for users who need to customize the lease extension terms in detail, such as adjusting specific clauses, adding new provisions, or ensuring alignment with state-specific landlord-tenant laws.
How to use this Lease Extension Addendum template
Should I include a clause about future rent increases in the lease extension addendum if my original lease doesn’t have one?
It’s wise to clarify whether future rent adjustments are allowed and under what terms in the extension. Since this is a starting point, consider adding a line like ‘Rent shall remain at the current rate unless otherwise agreed in writing by both parties’ to avoid ambiguity. Consulting a real estate attorney can help ensure this aligns with local laws and your intentions.
What happens if the tenant or landlord wants to negotiate changes after the addendum is drafted but before it’s signed?
The addendum is a flexible document, so you can edit the Word file to reflect agreed-upon changes before finalizing. If significant revisions are needed, save a copy with version notes (e.g., ‘Draft_v2’) to track updates. Always ensure both parties review and approve the latest version to prevent misunderstandings.
Do I need to re-state all the terms from the original lease in the extension, or can I reference it instead?
You can—and should—reference the original lease to avoid redundancy. For example, include language like ‘All terms not explicitly modified in this addendum shall remain as stated in the original lease dated [date].’ This keeps the document concise while ensuring clarity. Always double-check that the referenced lease is easily accessible to all parties.
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