Garage door service valuations rest on SDE (Seller's Discretionary Earnings), not EBITDA, because most garage operations are owner-operated with discretionary expenses running through the business. Start by calculating SDE: take total revenue from service calls, installations, emergency services, and related revenue sources, subtract cost of goods sold (parts costs, materials, equipment, subcontractor labor if any outsourced), subtract direct employee payroll (technician wages, benefits, payroll taxes), subtract facility costs (shop rent or mortgage, utilities, insurance, maintenance, equipment depreciation), subtract vehicle costs (fuel, maintenance, insurance, equipment), subtract marketing and customer acquisition costs, then add back owner compensation (if withdrawn from business), one-time unusual expenses, and personal expenses run through the business. Your SDE represents the valuation multiple baseline.

The 2.2x-3.8x SDE range reflects buyer acquisition activity in the marketplace. A garage door service generating $150K SDE with strong service revenue (60%), emergency 24/7 capability, 5 trained technicians, and established builder relationships trades closer to 3.5x ($525K) than 2.2x ($330K). The same business with only 35% service revenue, no emergency capability, and single technician trades closer to 2.4x ($360K). Service revenue percentage and operational depth create significant valuation variance affecting deal pricing.

Service revenue percentage is the primary valuation driver and buyer focus. Segment your annual revenue explicitly into: (1) installation revenue (new doors, openers, complete systems), (2) service revenue (repairs, maintenance contracts, emergency calls), (3) parts and materials markup (retail parts sales). A $800K revenue shop with 65% service revenue generates $520K service revenue, $280K installation revenue. If service carries 70% gross margins and installation carries 38%, your COGS is approximately $154K service plus $173K installation equals $327K, leaving $473K gross margin to cover operating costs.

Emergency capability adds 0.3x-0.5x multiple points because it creates pricing premium and customer stickiness. A shop running 24/7 emergency service with dedicated evening/weekend technicians on rotation captures 15-25% revenue premium on total business revenue. If your $800K revenue shop adds emergency service generating $120K annually, that's $120K at 70% margin equals $84K additional EBITDA, justifying 0.4x-0.5x multiple premium alone.

Builder relationships create predictable recurring revenue with minimal customer acquisition costs. A garage door shop with 3-5 active builders generating 200+ door installations annually at contracted rates removes customer acquisition uncertainty. Contracts typically run 2-3 years with renewal expectations. Document builder revenue separately: if 40% of installation volume comes from 3 builders, that's significant competitive moat that buyers specifically value. Builder revenue is less subject to economic cycles than residential consumer repair calls.

Technician retention directly monetizes in buyer valuation and acquisition pricing. Each technician with 3+ year tenure and DASMA certification is worth $30-50K in valuation. A shop with 5 technicians (3 with 5+ years, 2 with 2 years) carries $90-150K implicit valuation from technician retention alone. This value evaporates if technicians leave post-acquisition, so buyers interview technicians and structure retention bonuses.

Parts inventory and stocked service vehicles signal operational maturity and planning. A shop with $75K in inventory across service trucks demonstrates inventory discipline. Parts revenue of $200K annually at 35% margins contributes $70K margin directly to profitability and eliminates supply chain disruption risk of waiting for parts delivery.

Online presence directly correlates with customer acquisition efficiency. A garage door service with 150+ Google reviews and 4.5+ stars for "garage door repair [city]" generates 20-30% of new volume from organic search. Strong reviews drive volume quality and referral rates.

Buyers acquiring garage door services include Nexus Property Solutions, Frontdoor (ServiceMaster brands), HomeServe, and regional HVAC companies expanding service portfolios. Acquisition targets are shops $600K-$2M revenue, 50%+ service revenue, 3+ trained technicians. Strategic buyers bid 2.5x-3.2x SDE. Financial buyers bid 2.8x-3.8x SDE because rollup strategies create economies.

Timing matters significantly for garage door service companies. Q4 (November-December) represents peak season for emergency calls and broken doors due to temperature swings, cold weather damage, and spring replacements before winter. Close valuations in Q1-Q2 using full prior-year data so buyers can analyze normalized results across all seasons and model accurate recurring revenue from service contracts. Service revenue diversification is the key to building valuation. As you grow from 40% service to 55% service revenue, your EBITDA margin improves 8-12 percentage points because service gross margins (70%+ on maintenance contracts and emergency calls) significantly exceed installation margins (38-42%). Document your service mix explicitly by category: preventive maintenance contracts recurring annually, emergency service calls with premium pricing, routine repairs, component replacements. Show your top customers and their annual spend patterns. A shop with $800K revenue and 55% service revenue generates $440K service revenue and $360K installation revenue at different margin rates. Calculate separate contribution margins: service (70% × $440K = $308K contribution), installation (40% × $360K = $144K contribution) = $452K total contribution margin, or 56% of revenue. This margin profile is substantially better than an installation-heavy shop and justifies premium valuation. Demonstrate margin improvement roadmap: moving from 40% service to 55% service over 18 months adds $50-80K annual contribution margin, supporting $250-400K valuation uplift across your buyer base.