Tenant alterations are physical changes a renter makes to a leased space, and in almost every case they require the landlord’s written consent before any work begins. That consent requirement sits in the lease itself, and ignoring it can cost a tenant the security deposit, the lease, or both. Federal rules on asbestos, lead paint, and accessibility add another layer that neither party can contract around. The practical path, whether you’re painting an apartment or building out a storefront, is to read the lease first, assemble a complete request, and get the approval in writing before a contractor sets foot in the space.
What the Lease Controls
Start with the lease. Most modern rental agreements include a “prior written consent” clause that bars any physical change without the landlord’s express approval. The clause exists to protect the owner from unauthorized work that could violate building codes, reduce the property’s value, or create liability. When a tenant challenges a refusal, courts in most states ask whether the landlord’s denial was reasonable, a standard rooted in the implied covenant of good faith and fair dealing that exists in virtually every contract. A landlord who refuses to let a restaurant tenant install a commercial kitchen, when the lease was negotiated for restaurant use, would have trouble defending that refusal.
Some leases include a deemed-approval provision: if the landlord doesn’t respond to a formal request within a set period, consent is treated as granted. The window varies by agreement, so check the exact language rather than assuming a default. If your lease has one, submitting your request through a method that creates a timestamp matters, because the clock starts when the landlord receives the materials.
Structural Changes vs. Cosmetic Changes
The legal weight of a proposed change depends on whether it’s structural or cosmetic. Structural work modifies load-bearing walls, plumbing, electrical systems, or other building infrastructure. Because it affects safety, it almost always requires licensed contractors, stamped plans from a professional engineer or registered architect, and building permits from the local jurisdiction. Most building departments won’t allow work to begin until permits are in hand.
Cosmetic changes are non-permanent modifications that leave the building’s core systems untouched: repainting, installing shelving, adding window treatments, or replacing flooring finishes. Landlords are more likely to approve this kind of work, and some leases grant blanket permission for certain categories. Even cosmetic changes can create a problem, though, under the property law doctrine of waste. A tenant who makes changes so personalized or unusual that the landlord has to spend significant money reversing them for a future occupant can be held liable for the cost of restoration.
Federal Rules That Override the Lease
Three sets of federal requirements apply regardless of what the lease says, and all three can turn a routine renovation into a legal problem if they’re ignored.
Asbestos
Under the Clean Air Act, the EPA’s National Emission Standards for Hazardous Air Pollutants require that owners or operators of commercial buildings give written notice to the appropriate state agency before any renovation that could disturb asbestos-containing materials. That notice must be delivered at least 10 working days before stripping or removal work begins.1eCFR. 40 CFR Part 61 Subpart M – National Emission Standard for Asbestos Only accredited asbestos professionals may perform inspection or removal work in commercial buildings.2U.S. Environmental Protection Agency. Information for Owners and Managers of Buildings That Contain Asbestos
Lead Paint
The EPA’s Renovation, Repair, and Painting Rule requires that any firm performing renovation work in pre-1978 buildings be EPA-certified and use lead-safe work practices. Individual renovators must also complete accredited training.3U.S. Environmental Protection Agency. What Does the Renovation, Repair, and Painting (RRP) Rule Require? The rule covers most residential and commercial properties, and violations carry substantial federal penalties. Before demolishing or altering anything in a building constructed before the late 1970s, test for both asbestos and lead. The lease should specify who pays for testing and abatement; legal liability runs to whoever controls the work.
ADA Compliance in Commercial Spaces
Commercial tenants doing work in spaces open to the public face Americans with Disabilities Act requirements on top of everything else. When an alteration affects the usability of a facility, the altered portions must be made readily accessible to the maximum extent feasible.4Office of the Law Revision Counsel. 42 USC 12183 – New Construction and Alterations in Public Accommodations and Commercial Facilities If the alteration touches an area containing a primary function such as a lobby, dining room, or sales floor, the path of travel to that area, along with restrooms and drinking fountains serving it, must also be made accessible.
There is a cost cap. If making the path of travel fully accessible would cost more than 20% of the overall alteration budget, the obligation is considered disproportionate. The tenant must still spend up to that 20% threshold, prioritizing an accessible entrance first, then an accessible route to the altered area, then restrooms.5eCFR. 28 CFR 36.403 – Alterations: Path of Travel Both the landlord and the tenant are legally responsible for ADA compliance in leased spaces open to the public, regardless of what the lease says about who will pay for the work.6ADA National Network. Who Has Responsibility for ADA Compliance in Leased Places of Public Accommodation, the Landlord or the Tenant? The lease can allocate costs between them, but neither party can use the lease to escape liability to a person with a disability.
How to Request Approval
A complete request package shortens the review timeline and makes approval more likely. Include drawings showing the existing layout and the proposed changes. Minor work doesn’t always need an architect, but structural alterations typically require stamped plans from a professional engineer or registered architect. Provide a materials list specific enough for the landlord to evaluate quality; vague descriptions invite rejection or follow-up questions that eat into the review period.
Contractor information matters as much as the drawings. Submit the contractor’s state-issued license number and a certificate of insurance showing both general liability and workers’ compensation coverage. Commercial leases routinely require general liability coverage of at least $1,000,000 per occurrence. Identify every building permit the project will need, which signals that the work will be inspected and done legally.
Submit the package through a method that creates proof of delivery and a clear timestamp. Certified mail with return receipt works; so do secure electronic portals that log submission dates. Expect the landlord to ask for changes during review: a different contractor, upgraded materials, a reduced scope, or after-hours construction in an occupied building. That back-and-forth is routine.
When the landlord approves, get it in writing. In commercial leasing, the document is often called a License for Alterations and spells out the permitted scope, construction conditions, insurance requirements, and restoration obligations. Without this record, a future property manager or new owner could later treat the finished work as a lease violation.
What Happens If You Skip Consent
Proceeding without written approval is one of the fastest ways to lose a tenancy. Unauthorized alterations are a lease breach. The landlord can demand restoration at the tenant’s expense, deduct restoration costs from the security deposit, or sue for any shortfall. If the damage is significant or the tenant refuses to put the space back, eviction and a damages claim for restoration costs, lost rent during repairs, and diminished property value can follow.
Unpermitted work adds its own layer. If the alterations required a building permit and the tenant skipped it, the local building department can issue stop-work orders and fines, and completed work may have to be torn out. The violations attach to the property, not just the person who did the work, so the landlord often ends up pulled into the fallout.
Fixtures, Trade Fixtures, and Restoration at Lease End
What happens to improvements when the lease ends is governed by fixture law. A fixture is personal property attached to the building so permanently that it becomes part of the real estate. Courts generally look at three factors: how the item is attached, whether it was intended to be permanent, and whether removing it would cause substantial damage. Built-in cabinetry, hardwood flooring, and permanent wall partitions almost always qualify as fixtures and become the landlord’s property without any compensation to the tenant.
Commercial tenants get a critical exception for trade fixtures, items installed specifically to carry on the tenant’s business. Restaurant equipment, display cases, specialized shelving, and manufacturing machinery are common examples. A tenant can remove trade fixtures at the end of the lease if three conditions are met: the items were installed for business purposes, removal will not cause substantial damage, and the tenant removes them before surrendering possession. If the lease sets different terms, the lease controls.
Most commercial leases also impose a restoration obligation, meaning the tenant must return the space to its original condition. This can require removing not just trade fixtures but also approved alterations: tearing out partition walls, patching floors, repainting. Negotiate the restoration clause carefully before signing. Some landlords will agree in advance to waive restoration for improvements that add value, but the waiver needs to be in writing at the time of approval. If the tenant walks away without restoring, the landlord deducts the cost from the deposit and can sue for the balance.
Mechanics’ Liens: The Landlord’s Hidden Exposure
If a tenant hires a contractor and then doesn’t pay, the contractor can file a mechanics’ lien. In most states, that lien can attach to the landlord’s title to the property, not just the tenant’s leasehold interest. Courts have held that when the lease requires the tenant to make specific improvements, the landlord is deemed to have “ordered” the work, which makes the owner’s interest subject to the lien even without any direct relationship with the contractor.
Landlords have tools to limit this exposure. In many states, an owner can record a Notice of Non-Responsibility within a short window (often 10 days) after learning that construction has begun, declaring that the owner did not authorize the work. The protection typically works only for permissive improvements. If the lease requires the tenant to build out the space, courts in several states treat the landlord as having consented to the work, and the notice may not hold. Leases also commonly require the tenant to identify contractors in advance, provide proof of payment and lien waivers, post a surety bond covering the project, and indemnify the landlord for any liens that attach to the property.
Tax Recovery for Tenant-Paid Improvements
Tenants who pay for their own improvements to a commercial space can recover some of the cost through depreciation. The IRS classifies interior improvements to nonresidential buildings as qualified improvement property, which carries a 15-year recovery period under the Modified Accelerated Cost Recovery System.7Office of the Law Revision Counsel. 26 USC 168 – Accelerated Cost Recovery System QIP covers most interior work but excludes building enlargements, elevators or escalators, and changes to the internal structural framework.
Bonus depreciation may let a tenant deduct a larger share in the first year rather than spreading it across 15. The available percentage has been changing: under the Tax Cuts and Jobs Act, 100% bonus depreciation was available through 2022 and then began phasing down by 20 percentage points per year, with subsequent legislation modifying the schedule. Confirm the current percentage with a tax advisor or IRS guidance for the year the work is placed in service.
Retail tenants who receive a construction allowance from the landlord may be able to exclude that payment from gross income under Internal Revenue Code Section 110. The exclusion applies when the lease is for retail space with a term of 15 years or less, the money is spent on permanent real property improvements that will revert to the landlord at the end of the lease, and the tenant doesn’t claim more than was actually spent on construction.8Office of the Law Revision Counsel. 26 USC 110 – Qualified Lessee Construction Allowances for Short-Term Leases Both parties must report the allowance and expenditures to the IRS. Tenants outside the retail context, or those on leases longer than 15 years, don’t qualify and will need to account for the allowance differently.