How to Value a Janitorial or Building Services Company

Building services is one of those industries that Wall Street ignored for decades and private equity discovered all at once. ABM Industries, Cushman & Wakefield Services, and a wave of PE-backed platforms have been rolling up janitorial and facilities management companies at an accelerating pace since 2018. I've advised on several of these transactions, and what strikes me every time is how much the valuation hinges on one thing: the labor model.

If you run a building services company and you're thinking about selling — or even if you're just trying to understand what your business is worth — this guide covers the mechanics that actually drive value in this space.

Why Building Services Is Consolidating Now

The thesis is straightforward. Commercial real estate owners want fewer vendor relationships. A property manager running a 2-million-square-foot office campus doesn't want to deal with separate contractors for janitorial, landscaping, HVAC maintenance, and pest control. They want one phone number. That creates a structural advantage for larger, multi-service providers — and PE has noticed.

The consolidation math works because building services companies have relatively predictable revenue (multi-year contracts), low capital expenditure requirements (no expensive equipment or inventory), and significant margin improvement potential through scale. A $3M janitorial company might operate at 8-10% EBITDA margins. Roll five of them together, centralize back-office and procurement, and you're looking at 12-15% margins on $15M of revenue. That's the playbook.

How Building Services Companies Are Valued

Most building services transactions price on EBITDA multiples, though smaller companies (under $1M EBITDA) sometimes trade on a percentage of revenue or gross profit. The ranges I see consistently:

• Small janitorial companies ($500K-$2M revenue): 2.5-4x SDE, or 40-60% of annual revenue. These are often owner-operated with limited contracts.
• Mid-market building services ($2M-$15M revenue): 4-6x EBITDA. This is where most PE add-on acquisitions happen.
• Larger platforms ($15M+ revenue, multi-service): 6-9x EBITDA. Platform-quality companies with management depth, diversified contracts, and specialty capabilities.

The spread within each bracket is enormous, and that spread is almost entirely explained by contract quality and labor economics. Two janitorial companies with identical revenue can be valued 40% apart based on these factors alone.

Contract Analysis: The Weighted Average Remaining Term

The single most important metric in building services valuation is the weighted average remaining contract term (WART). Every sophisticated buyer I've worked with calculates this before they even look at the financials.

Here's how it works. Take each contract, multiply its annual value by its remaining term in years, sum all those products, and divide by total contract revenue. A company with $5M in revenue across ten contracts might have a WART of 2.8 years — meaning the average dollar of revenue is locked in for nearly three more years.

In my experience, buyers apply rough thresholds. A WART under 1.5 years signals risk — you're essentially re-selling the business every year. A WART of 2-3 years is solid. Above 3 years, particularly with built-in escalators, and you're in premium territory. Government and military contracts often run 5-7 years with options, which is one reason they command higher multiples.

But watch the fine print. I've seen sellers claim long-term contracts that actually had 30-day termination-for-convenience clauses. A five-year contract that the client can cancel with 30 days' notice isn't really a five-year contract. Buyers will read every agreement cover to cover during diligence.

The Labor Problem: 100%+ Annual Turnover

This is the elephant in every building services deal. Annual frontline employee turnover of 100-200% is not unusual — it's the norm. A company with 200 janitors might hire and lose 300 people in a single year. The costs are staggering: recruiting, background checks, training, uniforms, lost productivity, client complaints during the transition.

Companies that have solved the turnover problem — or even just reduced it to 60-80% — are genuinely rare and command meaningful valuation premiums. I've seen it add a full turn of EBITDA to the multiple.

What does "solving it" look like in practice? The companies I've seen do it successfully share a few characteristics:

• Above-market wages with a clear progression path. Paying $1-2/hour above market costs $2,000-$4,000 per employee per year but saves $3,000-$5,000 in turnover costs. The math works.
• Health benefits for full-time employees. In an industry where benefits are rare, offering basic health insurance is a powerful retention tool.
• Structured training and certification programs. Floor care technician, carpet extraction specialist, green cleaning certification — these sound modest, but they give employees a sense of progression and skill development.
• Route and shift stability. Constantly reassigning workers to different buildings destroys retention. The best operators let teams own their buildings.

When I'm advising a building services company on pre-sale preparation, labor metrics are the first thing I work on. Documenting your turnover rate, average tenure, training program, and recruitment pipeline isn't glamorous work, but it directly impacts what a buyer will pay.

Customer Concentration: The Silent Killer

Building services companies are particularly vulnerable to customer concentration risk. It's common to see a janitorial company where one property management firm represents 30-40% of revenue. That's not a diversified business — it's a subcontractor relationship with a single point of failure.

The threshold most buyers use: no single customer above 15% of revenue, and the top five customers below 50%. If you're above those thresholds, expect a discount — sometimes a steep one. I've seen deals where a 35% customer concentration knocked a full turn off the EBITDA multiple.

The fix isn't quick. Diversifying a customer base takes 2-3 years of deliberate sales effort. If you're thinking about selling in that timeframe, start now.

Specialty Capabilities That Command Premiums

Not all square footage is created equal. Cleaning a standard office building is commodity work. Cleaning a hospital operating room, a pharmaceutical cleanroom, or a semiconductor fab requires specialized training, equipment, and certifications. Buyers pay up for these capabilities because they create barriers to entry and support higher margins.

The specialties I see commanding the biggest premiums:

• Medical/healthcare facility cleaning: OSHA bloodborne pathogen training, infection control protocols, Joint Commission compliance. Margins 20-30% above standard janitorial.
• Cleanroom and controlled environment: ISO 14644 certification, gowning protocols, particle count monitoring. Rare capability, high barriers.
• Government/military contracts: Security clearances, NIST compliance, prevailing wage requirements. Long contract terms and high switching costs.
• Industrial and manufacturing: Chemical handling, confined space, hazmat certifications. Fewer competitors, stickier relationships.

Margin Per Square Foot: The Metric Buyers Actually Use

Revenue per square foot is a vanity metric. What matters is gross margin per square foot — the profit left after direct labor and supplies for each square foot you service. This metric normalizes across building types, geographies, and service levels.

I typically see gross margins of $0.15-$0.30 per square foot per month for standard office cleaning, $0.40-$0.80 for medical facilities, and $1.00+ for cleanroom environments. Companies that track this metric at the contract level — and can show buyers a clear distribution — signal operational sophistication that directly supports a higher multiple.

If you don't track margin per square foot by contract, start now. It's one of the first things a PE buyer's operating team will calculate, and you want to control the narrative.

The Recurring Revenue Premium

Building services is inherently a recurring revenue business, but the quality of that recurrence varies dramatically. A company with multi-year contracts featuring annual escalators and auto-renewal provisions has meaningfully more valuable revenue than one with month-to-month arrangements, even if the dollar amounts are identical.

The best operators I've seen build "stacking" into their contract structures — start with basic janitorial, then add floor care, then window cleaning, then day porter services. Each additional service increases switching costs and deepens the relationship. A client using you for four services is far less likely to switch than one using you for basic nightly cleaning.

What to Do Before You Sell

If you're 18-24 months from a potential sale, here's my priority list for maximizing value:

• Document every contract. Term, renewal provisions, termination clauses, escalators, scope of work. Build a contract summary matrix a buyer can review in 30 minutes.
• Track labor metrics religiously. Turnover rate by quarter, average tenure, training completion rates, workers' comp claims. Improvement trends matter as much as absolute numbers.
• Reduce customer concentration. If your top customer is above 20%, make diversification your #1 sales priority.
• Build a management layer. A buyer needs to know the business runs without you. Operations managers, account managers, and a sales function that doesn't depend on the owner's relationships.
• Clean up subcontractor arrangements. If you sub out specialized work, make sure those relationships are documented and transferable. Undocumented handshake deals with subs are a diligence red flag.

The Bottom Line

Building services companies are valued on the quality and durability of their revenue streams, period. Long contracts, low concentration, specialty capabilities, and a labor model that actually works — these are the factors that separate a 3x EBITDA sale from a 7x EBITDA sale. The commercial cleaning market is being reshaped by consolidation, and well-run building services companies with the right characteristics are attracting serious buyer interest. The owners who understand what drives value in this space — and spend 2-3 years preparing accordingly — are the ones walking away with life-changing exits.