If you're managing commercial properties in Detroit, you've probably encountered that familiar scenario: you think you're dealing with a straightforward exterior wall touch-up, only to discover once the scaffolding goes up that there's underlying damage that needs immediate attention. That's exactly when time and material contracts (often called T&M contracts) become your best friend – though, like any relationship, you need to understand what you're getting into before you commit.
What Exactly Are Time and Material Contracts?
Think of time and material contracts as the "pay-as-you-go" option for building surface maintenance. Instead of getting a fixed price upfront (like ordering a set meal at a restaurant), you're essentially telling your contractor, "Start working, keep track of your time and materials, and bill me for what you actually use" (more like building your own meal from a buffet where each item has its own price).
This approach makes particular sense for building surface maintenance because, let's be honest, you rarely know what you're dealing with until someone starts peeling back layers of old paint or removing deteriorated siding. That beautiful brick facade might look solid from the street, but once your contractor starts working, they could discover pointing that needs complete replacement, or structural issues that require immediate attention.
The key difference here (and this is important to understand) is that with T&M contracts, you're paying for actual labor hours worked and actual materials used, each with predetermined markups that you've agreed to upfront. It's transparent in a way that fixed-price contracts often aren't, though it does require more active management on your part.
How These Contracts Work for Building Surface Projects

When we're talking about building surface maintenance – whether that's exterior wall repairs, roof maintenance, window glazing, or facade restoration – T&M contracts follow a pretty straightforward process, though there are nuances you need to watch for.
Your contractor tracks their time (usually in detailed timesheets that break down different types of work), documents all materials purchased specifically for your project, and then bills you accordingly. For instance, if they're repairing damaged brick on your office building, you'll see charges for the actual hours spent by masons, laborers, and project supervisors, plus the cost of bricks, mortar, scaffolding rentals, and any specialized tools needed.
The beauty of this approach (and we've seen this work really well for Detroit property managers dealing with older buildings) is that it adapts to what your building actually needs. If your contractor discovers that some of the brickwork can be saved with repointing instead of full replacement, you save money. If they find more damage than expected, the contract structure allows them to address it without stopping work to renegotiate prices.
However, and this is crucial, you need systems in place to monitor what's happening. Unlike a fixed-price contract where you can somewhat set-and-forget, T&M contracts require you to stay engaged with the process.
The Benefits That Make Property Managers Happy
Flexibility When Dealing with Unknown Conditions
Detroit's building stock includes many structures that are decades old, and surface maintenance often reveals surprises. With T&M contracts, your contractor can address newly discovered issues without the back-and-forth of change orders that can delay projects for weeks. They can pivot from surface repairs to more extensive work as needed, keeping your building maintenance on track.
Transparency in Pricing
You'll receive itemized invoices showing exactly where your money goes – how many hours were spent on masonry work versus painting, what materials were purchased, and what markups were applied. This level of detail (while sometimes overwhelming) gives you insights into your building's actual maintenance needs that you can use for future planning.
No Padding for Unknowns
Fixed-price contractors often build contingencies into their bids to cover potential surprises. With T&M contracts, you're not paying for problems that might not exist – you only pay for work that actually gets done and materials that actually get used.
The Challenges You Need to Manage

Cost Control Requires Active Management
Without careful oversight, T&M projects can experience scope creep. A contractor who discovers additional work might continue without proper authorization, leading to bills that exceed your expectations. You need clear procedures for approving additional work beyond the original scope.
Budget Predictability Issues
While you can set not-to-exceed limits (which we strongly recommend), T&M contracts make it harder to predict exact costs upfront. This can complicate budget planning, especially for property management companies handling multiple buildings with varying maintenance needs.
Potential for Inefficiency
Some contractors might work less efficiently when they know they're getting paid by the hour rather than racing to complete a fixed-price project. You need to choose contractors with strong reputations and implement monitoring systems to ensure productivity.
Essential Elements for Your T&M Contract
Detailed Rate Structures
Your contract should specify exactly what you'll pay for different types of work. For building surface maintenance, this typically includes rates for general laborers, skilled tradespeople (like masons, roofers, or painters), project managers, and any specialized technicians. Don't accept vague language like "prevailing rates" – get specific dollar amounts per hour for each category of worker.
Material Markup Agreements
Contractors typically mark up materials by 15-35% to cover their procurement costs, storage, and handling. Make sure your contract specifies this markup percentage clearly. For major surface maintenance projects, this can add up quickly, so negotiate this number and get it in writing.
Not-to-Exceed Protections
Even though you want flexibility, you need budget protection. Include a not-to-exceed (NTE) clause that caps your total cost. This gives your contractor authority to work within defined parameters while protecting you from runaway expenses. For most building surface projects, we recommend setting the NTE at about 125-150% of the contractor's initial estimate to allow for reasonable discoveries.
Documentation Requirements
Require daily timesheets, material receipts, and progress photos. Your contractor should provide detailed invoices that let you verify charges against actual work performed. This might seem like micromanaging, but it's essential for cost control and quality assurance.
Detroit-Specific Considerations for Property Managers

Detroit's climate and building conditions create unique challenges for surface maintenance. Our freeze-thaw cycles are particularly hard on masonry and exterior surfaces, and many of our commercial buildings date back several decades. When negotiating T&M contracts, factor in these local conditions.
Make sure your contractor understands Detroit's property maintenance codes and permitting requirements. Surface work that seems straightforward might require permits or inspections, especially for historic buildings downtown or in regulated districts. Your T&M contract should specify who handles permit costs and delays.
Additionally, consider seasonal factors in your planning. Surface maintenance work often needs to be completed during specific weather windows, and T&M contracts can help you take advantage of good weather without being locked into rigid scheduling that fixed-price contracts sometimes require.
Best Practices for Managing T&M Surface Maintenance
Start with Clear Scope Definition
Even though T&M contracts provide flexibility, begin with the most detailed scope of work possible. The clearer your initial expectations, the easier it is to manage changes and additional work. Walk the building with your contractor before signing and document existing conditions thoroughly.
Implement Regular Check-ins
Schedule weekly progress meetings where you review timesheets, material usage, and any scope changes. This isn't about micromanaging your contractor – it's about staying informed so you can make good decisions about your building's maintenance needs.
Set Milestone Payment Schedule
Rather than paying all costs as they occur, consider tying payments to completion of specific phases of work. This gives you leverage to ensure quality standards are met and provides natural points to evaluate whether the project is proceeding as expected.
Plan for Weather and Seasonal Factors
Building surface maintenance in Michigan depends heavily on weather conditions. Your T&M contract should address how weather delays affect scheduling and costs, and whether there are circumstances where work needs to stop for safety or quality reasons.
Making T&M Contracts Work for Your Properties
The key to successful time and material contracts for building surface maintenance is choosing the right contractor and implementing strong management practices. Look for contractors with solid reputations, good communication systems, and experience with buildings similar to yours.
Remember that T&M contracts work best when you have a partnership mentality with your contractor rather than an adversarial relationship. You're both working toward the same goal: maintaining your building efficiently and cost-effectively. The transparency of T&M contracts can actually strengthen this partnership by eliminating the mystery about where your maintenance dollars are going.
For Detroit property managers dealing with aging building stock and unpredictable maintenance needs, T&M contracts offer flexibility that fixed-price contracts simply can't match. Just make sure you understand what you're signing up for and have systems in place to manage the process effectively.