Other Services to Buildings and Dwellings (NAICS 561790): An Investor's Primer

1. Overview

This is the "everything else" bucket of building and property upkeep — the specialized cleaning and maintenance jobs that keep a home or commercial building functioning but don't fall under janitorial, landscaping, pest control, or carpet cleaning. In practice it means swimming-pool cleaning and maintenance, air-duct (HVAC — heating, ventilation, and air conditioning) cleaning, chimney sweeping, gutter and drain cleaning, and building-exterior power/pressure washing.[4]

Why it matters to an investor: it is a large, recession-resilient pool of recurring, route-based service revenue — the kind private-equity (PE) firms and franchisors have spent the last decade rolling up. It is also one of the most fragmented industries in the U.S. economy. The largest four firms control roughly 6% of revenue and the largest 50 under 16%.[2] There is no dominant national brand and no pure-play public stock.

The central idea is operational, not technological: local customer relationships, route density, labor productivity, recurring contracts, and disciplined acquisitions create the cash flow. For public-market investors, exposure is indirect (distributors, retailers, and diversified facility/property-services companies). For private investors, this is a hands-on world of owner-operated businesses, franchises, and consolidation plays. The main caveat is that 561790 is a classification bucket, not a single unified business model.

2. What it is and how it's structured

NAICS (North American Industry Classification System) code 561790 covers establishments providing services to buildings and dwellings except four activities that get their own codes.[4]

Included: swimming-pool cleaning/maintenance; ventilation/air-duct cleaning; chimney cleaning; drain and gutter cleaning; building-exterior cleaning and power/pressure washing (except sandblasting); kitchen exhaust-hood cleaning.[4]

Explicitly excluded (adjacent codes) — this matters for sizing:

• Exterminating and pest control → 561710
• Janitorial services, including window cleaning → 561720
• Landscaping → 561730
• Carpet and upholstery cleaning → 561740
• Sandblasting building exteriors → 238990 (specialty trade contractors)
• Drain/sewer work bundled with plumbing → 238220 (plumbing contractors)[4]

Two boundary quirks trip people up: window cleaning is not here (it sits in janitorial, 561720), and drain cleaning straddles this code and plumbing depending on whether it's a standalone service.

Because of these boundaries the code mixes very different revenue types under one label: recurring residential routes (pools), scheduled periodic work (duct, chimney), one-time projects (gutter cleaning, pressure washing), and commercial maintenance contracts. A pool-maintenance company has subscription-like revenue; a chimney sweep is highly seasonal; a pressure-washing operator lives on one-time jobs.

Ownership mix: overwhelmingly small, private, owner-operated firms — often a single truck, a technician, and equipment. The federal employer data imply an average of about 5 employees per establishment and average receipts near $801,000 per firm.[1][2] Layered on top are two organizing forces: national franchise systems (pool service, duct cleaning) and PE-backed consolidators buying up local operators, providing centralized marketing, technology, training, procurement, and national-account coverage. Our federal source does not provide a complete ownership-by-legal-form breakdown.

3. How big it is

Federal figures for the employer side of the industry (businesses with paid staff). Receipts, firm count, and concentration are from the 2022 Economic Census; establishments, employees, and payroll are from 2023 County Business Patterns (CBP).

The concentration ratios (CRn = the combined revenue share of the n largest firms) tell the whole story: this is a textbook fragmented industry. The Herfindahl-Hirschman Index (HHI, a standard concentration measure) is suppressed in our federal source, so we do not state a value.[2] At a $9 million receipts threshold, essentially every firm in the industry qualifies as a "small business."[3]

The undercount caveat (large). These federal figures count only employer firms. CBP excludes the self-employed, businesses with no employees, businesses without an Employer Identification Number (EIN), and most government workers; the Census Bureau's separate Nonemployer Statistics program covers the no-payroll businesses that dominate this trade.[5][6] The gap is enormous: third-party research firms count roughly 85,000 pool-cleaning businesses, ~32,000 pressure-washing businesses, and ~18,600 duct-cleaning businesses in the U.S. — each subsegment's business count rivals or exceeds the entire 18,069 federal employer establishment total.[7][8][9] Read the $13.97 billion as a floor on the employer segment, not the full economic footprint. Our federal source does not include nonemployer receipts, service-line mix, margins, or route utilization, so we do not state those.

For scale on the largest subsegment, third-party estimates put the U.S. pool-maintenance/cleaning services market around $8–8.6 billion, growing toward ~$10 billion by decade's end.[7][10] Air-duct cleaning (~$1.1B) and pressure washing (~$1.2B) are much smaller.[8][9]

4. The investable universe

There is no pure-play public company in NAICS 561790, and none reports it as a standalone segment. The closest large direct operator is Roto-Rooter (drain cleaning), and even that is a minority of its parent's revenue. Public exposure is a slice of a broader story; the real operators are private.

Note that POOL and LESL are product companies (distribution and retail), not service firms — but they are the cleanest liquid proxies for the health of the pool-service economy.

Major private and franchise owners (where the actual 561790 work happens):

• Authority Brands (owned by Apax Partners) — owns ASP (America's Swimming Pool Company), among the largest U.S. pool-service franchises, with roughly 380+ units.[17]
• Neighborly (owned by KKR) — ~30 home-services brands including Mr. Rooter (drain), Window Genie, and Dryer Vent Wizard. (Window Genie's core window cleaning sits in 561720, but its gutter cleaning and pressure washing fall in 561790.)[18][19]
• Pinch A Penny (owned by Pool Corp) — ~290 franchised pool retail/service stores; average store gross sales ~$2.0M.[12]
• Poolwerx — a large global pool-service franchise (~160 stores, ~600 service vehicles).[20]
• SPS PoolCare (backed by Storr Group) — a direct pool-service consolidation platform; reports 50,000+ recurring customers.[21]
• BELFOR Franchise Group — DUCTZ (air ducts) and HOODZ (kitchen-exhaust cleaning).

Adjacent, but not core 561790, are the large restoration/remediation platforms — Roark Capital's ServiceMaster Brands and Blackstone-backed SERVPRO — plus diversified home-service franchisors such as JM Family's Home Franchise Concepts; they touch cleaning and restoration work that is mostly classified in other codes.[22][23][24]

5. How the money works

Owners make money the way route-based service businesses do — not through big assets, but through labor utilization, route density, recurring contracts, and upsell.

• Route density. Profit hinges on how tightly accounts cluster geographically. A technician's day is billable time on-site minus unpaid "windshield time" driving between stops. More stops per route per truck = higher revenue per vehicle and higher margin. This is the single biggest operational lever and the core rationale for local consolidation.
• Recurring vs. one-time revenue. Pool maintenance is effectively a subscription — weekly/monthly service customers can't skip (a green pool is not an option), producing sticky, high-retention revenue. Duct cleaning, chimney sweeping, and power washing are episodic one-time jobs. Recurring revenue is far more valuable and commands higher business-sale multiples.
• Upsell and attachment. Base service is thin-margin; the money is in repairs and equipment replacement (pumps, heaters, filters) and chemical/parts markups.
• Asset-light, labor-intensive. Startup capital is a truck and equipment; the dominant cost is field labor, plus payroll taxes/benefits, chemicals and consumables, vehicles, insurance, and customer-acquisition cost. Gross margin swings with wage inflation, technician utilization, chemical costs, and fuel.
• The metrics that matter. Recurring-customer retention and churn, revenue per route, jobs per crew-day, labor cost per job, average ticket, price realization, rework/claims, safety incidents, customer concentration, and working-capital needs. Crew and route utilization is a more useful lens than plant-style "capacity utilization." Investors should separate same-location growth from acquisition growth — a roll-up can post fast revenue growth yet weak returns if deals are overpriced or poorly integrated.
• Franchise economics. Franchisees pay an upfront fee plus ongoing royalties (typically ~5–10% of revenue) and marketing fees; the franchisor earns on royalties and, often, product supply. Pool Corp's ownership of Pinch A Penny is a distribution-plus-franchise flywheel.
• The consolidation thesis. Buy small local operators at low earnings multiples, bolt them onto existing routes, professionalize pricing/software/call-centers, and re-rate the combined recurring-revenue book at a higher multiple. Recurring routes provide defensive cash flow; event-driven and restoration work is volatile — big short-term spikes followed by weaker periods.

Seasonality matters: pools peak in summer with open/close shoulder seasons; gutters in fall; chimneys in winter — driving working-capital and staffing swings.

6. What drives demand

• The installed base. Recurring demand is tied to the stock of pools (more than 10 million U.S. residential pools, per industry estimates), HVAC systems, chimneys, gutters, and buildings — not just new construction. An aging installed base needs service regardless of the housing cycle.[7]
• Outsourcing of specialized/hazardous work. Homeowners hand off jobs involving chemicals, heights, or confined spaces; commercial owners want fewer vendors and standardized service levels.
• Housing cycle and interest rates. New pool builds and big-ticket home projects are rate-sensitive and discretionary; both POOL and Leslie's saw revenue decline in 2023–2024 as high rates cooled construction, while recurring maintenance held up far better.[12][13]
• Sun Belt migration and climate. Pool density is highest in warm states; population shifts to Florida, Texas, and Arizona expand the maintenance base.
• Weather and catastrophe. Storms, floods, and freezes drive gutter, drainage, and exterior work. NOAA (National Oceanic and Atmospheric Administration) counted 27 U.S. billion-dollar weather/climate disasters in 2024, totaling ~$182.7 billion in damage — supportive of emergency and exterior demand, though much restoration is booked in adjacent NAICS codes, so it is not a direct 561790 revenue proxy.[25]
• Indoor-air-quality (IAQ) awareness. Post-COVID focus on air quality gave duct cleaning a demand bump — tempered by EPA skepticism (see Regulation).
• Labor availability. As a labor-intensive, immigrant-heavy trade, demand is met (or constrained) by workforce supply and wages.
• Digital discovery. Online reviews, search, and scheduling/booking tools make small local operators easier to find and hire.

7. Regulation

Regulatory touch is light and mostly local — a key reason the industry is so fragmented and easy to enter — but several federal rules apply.

• Licensing and permits vary by service, state, county, and city; many activities need a local business license and some need a trade credential.[26]
• Pool chemicals and public pools. Technicians handle chlorine and acids under state chemical-storage/transport rules; commercial/public pools often require a Certified Pool Operator (CPO) credential and health-department inspection. The CDC (Centers for Disease Control and Prevention) publishes a Model Aquatic Health Code (MAHC), but it is voluntary guidance, not federal law, unless a jurisdiction adopts it.[27]
• Duct cleaning. No federal license; the industry self-regulates via voluntary NADCA (National Air Duct Cleaners Association) standards. Notably, the EPA (Environmental Protection Agency) does not recommend routine duct cleaning, does not certify duct cleaners, and warns that improper work can worsen air quality — a standing reputational and consumer-protection overhang (the segment has a history of "$99 whole-house" bait-and-switch marketing).[28]
• Drain cleaning. Where it crosses into sewer/plumbing work, many states require a plumbing license.
• Power washing. Wash-water runoff into storm drains can trigger Clean Water Act stormwater rules and local wastewater ordinances.
• Labor and safety (OSHA — Occupational Safety and Health Administration). Fall-protection rules for elevated work (29 CFR 1910.28), powered building-maintenance platforms (1910.66), and HazCom (Hazard Communication) for chemical handling — labels, safety data sheets (SDS), a written program, and worker training (1910.1200). I-9 employment verification looms large given the workforce.[29]
• Franchising. Franchisors must issue an FTC (Federal Trade Commission) Franchise Disclosure Document (FDD) covering 23 specified categories, delivered to a prospect at least 14 days before any signing or payment.[30]

Investors should also check workers' compensation, wage-and-hour and worker-classification compliance, insurance coverage, and vehicle safety.

8. Competitive dynamics and consolidation

The defining feature is extreme fragmentation with active roll-up. Barriers to entry are trivial — a truck, equipment, and word-of-mouth — so thousands of local and nonemployer operators compete on price, trust, response time, technician quality, reviews, and local familiarity.[2] Switching costs are low, yet relationships are sticky: repeat business is the majority of revenue at established operators.

The counter-force is professionalization from the top. PE capital (Apax/Authority Brands, KKR/Neighborly) and strategic buyers (Pool Corp's Pinch A Penny) aggregate mom-and-pop operators to capture route density, purchasing scale, centralized call centers/marketing, better scheduling software, national-account coverage, and the valuation premium on recurring revenue.[12][17][18] A demographic tailwind accelerates this: many owner-operators who built businesses in the 1980s–2000s are reaching retirement with no succession plan — a "silver tsunami" of businesses for sale at modest multiples.

Consolidation is most attractive where revenue is recurring, routes are dense, pricing is disciplined, and the founder's knowledge transfers to professional management — and least attractive where work is project-based, customers are concentrated, or the owner personally performs most jobs. The likely outcome is a set of regional and specialty platforms, not one dominant national operator; the industry will stay deeply fragmented for years.

9. Risks

• Low barriers → chronic price competition from an endless supply of new one-truck entrants.
• Labor. Tight labor markets, wage inflation, high turnover, and reliance on immigrant labor make workforce (and immigration enforcement) the central operating risk.
• Safety and liability. Falls, ladders, elevated platforms, vehicle accidents, chemical exposure, and property damage generate claims, reputational harm, and rising insurance costs (general liability, workers' comp, commercial auto, catastrophe).[29]
• Cyclicality of discretionary/new-build demand. One-time services and new pool construction fall in downturns and when rates are high (visible in 2023–2024 sector revenue declines); recurring maintenance is more resilient.[12][13]
• Input-cost and supply shocks. Chemical and fuel costs swing margins. The 2020 fire at BioLab's Lake Charles chlorine plant (following Hurricane Laura) triggered a 2021 trichlor tablet shortage with price spikes reported up to ~70% — a reminder of concentrated chemical-supply risk.[31]
• Weather and catastrophe variability — droughts/water restrictions, freezes, and hurricanes swing both demand and cost.
• Reputational/regulatory — the duct-cleaning segment carries EPA skepticism and a scam-marketing history that invite scrutiny.[28]
• Franchise and roll-up risk — weak franchisee economics, disclosure failures, or brand damage hurt a whole network; excessive leverage, aggressive purchase accounting, weak integration, or overpaying for local operators destroys roll-up returns.[30]
• Data/classification risk — federal employer statistics materially understate one-person operators, and 561790 lumps together businesses with very different revenue quality, cyclicality, and capital needs; don't size or value the market from the headline figures alone.[5][6]
• Indirect-exposure risk for public investors — the "proxy" stocks each carry unrelated baggage (Chemed is mostly hospice; POOL/LESL are product-cycle and weather exposed; ABM/GDI/FSV are broad facilities/property plays).

10. How to invest and the outlook

Public routes (all indirect — no pure play). Treat these as different types of exposure, not interchangeable substitutes, and only after gauging how much of each company actually relates to 561790:

• Chemed (CHE) — the largest listed direct operator via Roto-Rooter drain cleaning, but roughly two-thirds of revenue is hospice care.[11]
• Pool Corporation (POOL) and Leslie's (LESL) — the cleanest liquid proxies for the pool-service economy, though they earn from distribution/retail, not service.[12][13]
• FirstService (FSV), ABM (ABM), GDI (GDI) — diversified property/facility-services companies with partial exterior-maintenance overlap.[14][15][16]
• There is no dedicated exchange-traded fund (ETF); exposure comes only as a component of broader home-services/facilities baskets. For any of these names, weigh share price, dividend yield, valuation multiples, segment reporting, acquisition history, leverage, and cash conversion — after confirming the relevant revenue share.

Private routes (where the real exposure is):

• Buy or build a local pool, duct, drain, or pressure-washing business — low capital, fast to start, owner-operator economics.
• Franchise into a proven system (ASP, Poolwerx, Pinch A Penny, Window Genie, Dryer Vent Wizard, DUCTZ) for brand and operating systems in exchange for royalties.[17][18][20]
• Acquire aging owner-operators (search-fund/independent-sponsor model) to capitalize on succession-driven deal flow, then build route density.
• Invest alongside consolidators — the PE roll-up thesis via platforms like Authority Brands (Apax), Neighborly (KKR), or SPS PoolCare (Storr).[17][18][21]

The diligence that separates winners from losers: Is revenue genuinely recurring? How concentrated are customers? How much work depends on the owner personally? Will the technicians stay? Are routes dense? Are licenses and insurance current? Do reported earnings hide aggressive owner add-backs? For valuation, compare genuinely similar businesses on recurring revenue, same-location growth, retention, free-cash-flow conversion, leverage, and EBITDA (earnings before interest, taxes, depreciation, and amortization) — and use enterprise-value-to-EBITDA (EV/EBITDA) multiples cautiously, since a recurring pool route, a seasonal pressure-washing shop, and a catastrophe-restoration platform do not deserve the same risk assessment.

Outlook — judgment. Cautiously positive over the long term. The structural case is durable: a large, aging installed base of pools, ducts, and buildings generates recurring demand relatively insulated from the economic cycle, while Sun Belt migration and IAQ awareness add tailwinds. The near-term swing factors are interest rates/housing (which depress new builds and big-ticket projects) and labor and chemical-input inflation (which squeeze margins). The most compelling opportunity is not passive public exposure but participation in consolidation — turning fragmented, recurring, route-based revenue into professionalized platforms. Returns will hinge on route density, labor management, safety, pricing, and acquisition discipline far more than on broad industry growth. Expect the roll-up to continue, recurring-revenue businesses to keep commanding premium valuations, and the industry to stay deeply fragmented for years to come.

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Sources

1. U.S. Census Bureau. County Business Patterns, 2023 — NAICS 561790 (establishments, employees, annual and first-quarter payroll). https://www.census.gov/data/datasets/2023/econ/cbp/2023-cbp.html
2. U.S. Census Bureau. 2022 Economic Census — Concentration / Comparative Statistics, NAICS 561790 (firms, receipts, CR4/CR8/CR20/CR50, HHI suppressed). https://www.census.gov/programs-surveys/economic-census.html
3. U.S. Small Business Administration. Table of Small Business Size Standards, 2023. https://www.sba.gov/document/support-table-size-standards
4. U.S. Census Bureau. 2022 NAICS Definition: 561790 Other Services to Buildings and Dwellings (scope, illustrative examples, cross-references). https://www.census.gov/naics/?details=561790&input=561790&year=2022
5. U.S. Census Bureau. County Business Patterns — Methodology (coverage; exclusion of nonemployers, no-EIN, self-employed). https://www.census.gov/programs-surveys/cbp/technical-documentation/methodology.html
6. U.S. Census Bureau. Nonemployer Statistics (businesses without paid employees). https://www.census.gov/programs-surveys/nonemployer-statistics.html
7. IBISWorld. Swimming Pool Cleaning Services in the US — Market Size / Business Count, 2024. https://www.ibisworld.com/united-states/market-size/swimming-pool-cleaning-services/4832/
8. IBISWorld. Air Duct Cleaning Services in the US — Industry Report, 2024. https://www.ibisworld.com/united-states/industry/air-duct-cleaning-services/6218/
9. IBISWorld. Pressure Washing Services in the US — Industry Report, 2024. https://www.ibisworld.com/united-states/industry/pressure-washing-services/6538/
10. Arizton Advisory & Intelligence. U.S. Pool Maintenance & Cleaning Services Market (USD 8.08B in 2023 → 10.33B by 2029), 2024. https://www.arizton.com/market-reports/us-pool-maintenance-and-cleaning-services-market
11. Chemed Corporation. Chemed Reports Fourth-Quarter and Full-Year 2024 Results (Roto-Rooter segment revenue ~$900.3M). https://www.chemed.com/news-releases/news-release-details/chemed-reports-fourth-quarter-2024-results
12. Pool Corporation. Year-End and Fourth-Quarter 2024 Results ($5.31B net sales) and Pool Corporation to Acquire Porpoise Pool & Patio / Pinch A Penny, 2024–2025. https://ir.poolcorp.com/pool-corporation-reports-year-end-and-fourth-quarter-2024-results-provides-2025-earnings-guidance/
13. Leslie's, Inc. Fourth Quarter & Fiscal 2024 Financial Results ($1.33B net sales), 2024. https://www.globenewswire.com/news-release/2024/11/25/2987067/0/en/Leslie-s-Inc-Announces-Fourth-Quarter-Fiscal-2024-Financial-Results-Provides-First-Quarter-Fiscal-2025-Outlook.html
14. FirstService Corporation. Form 40-F, Fiscal Year 2024 (FirstService Brands: First Onsite, Paul Davis, CertaPro). https://www.sec.gov/Archives/edgar/data/1637810/000117184325001007/ex_778902.htm
15. ABM Industries. Form 10-K, Fiscal Year 2024 ($8.4B revenue; facility-services segments). https://www.sec.gov/Archives/edgar/data/771497/000077149724000029/abm-20241031.htm
16. GDI Integrated Facility Services. Outdoor Building Maintenance / Exterior Cleaning Services. https://gdi.com/services-and-industries/outdoor-building-maintenance-services/
17. Apax Partners. Authority Brands / America's Swimming Pool Company (ASP). https://www.apax.com/partnerships/authority-brands/
18. FranchiseWire. KKR to Acquire Home Services Franchisor Neighborly, 2021. https://www.franchisewire.com/kkr-to-acquire-home-services-franchisor-neighborly/
19. Neighborly. Window Genie — Window and Gutter Cleaning; Dryer Vent Wizard. https://www.neighborly.com/about/window-genie
20. 1851 Franchise. Franchise Deep Dive: Poolwerx Franchise Costs, Fees, Profit and Data. https://1851franchise.com/franchise-deep-dive-poolwerx-franchise-costs-fees-profit-and-data-2723699
21. SPS PoolCare. SPS PoolCare Celebrates Five Years and 50,000 Recurring Customers. https://spspoolcare.com/news/sps-poolcare-celebrates-five-years-50000-recurring-customers/
22. Roark Capital. About Roark / ServiceMaster Brands. https://www.roarkcapital.com/about
23. SERVPRO. About — History and Ownership (Blackstone). https://www.servpro.com/about/
24. JM Family Enterprises. Home Franchise Concepts. https://jmfamily.com/our-businesses/home-franchise-concepts/
25. National Oceanic and Atmospheric Administration. Assessing the U.S. Climate in 2024 (27 billion-dollar disasters; $182.7B). https://www.ncei.noaa.gov/news/national-climate-202413
26. U.S. Small Business Administration. Apply for Licenses and Permits. https://www.sba.gov/business-guide/launch-your-business/apply-licenses-permits
27. Centers for Disease Control and Prevention. About the Model Aquatic Health Code (MAHC). https://www.cdc.gov/model-aquatic-health-code/index.html
28. U.S. Environmental Protection Agency. Should You Have the Air Ducts in Your Home Cleaned? (Indoor Air Quality guidance). https://www.epa.gov/indoor-air-quality-iaq/should-you-have-air-ducts-your-home-cleaned
29. Occupational Safety and Health Administration. Fall Protection (29 CFR 1910.28), Powered Platforms for Building Maintenance (1910.66), Hazard Communication (1910.1200). https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.28
30. Federal Trade Commission. Franchise Rule / Franchise Disclosure Document (FDD). https://www.ftc.gov/legal-library/browse/rules/franchise-rule
31. CNBC. A major chlorine shortage is set to spoil swimming pool fun this summer (2020 BioLab Lake Charles plant fire; 2021 trichlor shortage and price spikes), 2021. https://www.cnbc.com/2021/04/30/a-major-chlorine-shortage-is-set-to-spoil-swimming-pool-fun-this-summer.html