Permit records from individual properties over time can reveal which types of work tend to occur together. When multiple permits appear for the same address within a certain time window—commonly 6-12 months—this suggests related projects or complementary work.

Some co-occurrence patterns appear logical when examined. Properties pulling roofing permits sometimes show solar permits shortly after, likely because solar installations require sound roof structures. HVAC replacement permits occasionally pair with electrical permits, possibly reflecting panel upgrades needed for modern high-efficiency systems. Pool construction permits frequently appear alongside landscape permits, suggesting coordinated backyard projects.

The strength of these patterns varies considerably. Some service pairs show strong associations (frequently occurring together), while others appear together only occasionally. Determining whether patterns are meaningful or coincidental requires analyzing substantial permit volumes across extended time periods. A few instances of two services occurring at the same property could be random; consistent patterns across hundreds of properties suggest actual relationships.

Our temporal analysis shows which services typically come first when they cluster at the same property. Roofing generally precedes solar work for practical reasons. Foundation work often precedes plumbing permits, indicating issues discovered during foundation repair. These consistent timing patterns help you understand the natural sequence of related services.

Certain service combinations appear more frequently in permit data than others, though the exact prevalence varies by market and time period.

• Roofing and Solar: These services show notable co-occurrence in markets with active solar adoption. The relationship typically follows a logical sequence—roofing permits first, followed by solar permits weeks or months later. This makes practical sense since solar installers generally require structurally sound roofs with remaining service life. Some properties show both permits filed simultaneously, possibly indicating planned project coordination.

• HVAC and Electrical: Modern HVAC systems sometimes require electrical work, particularly when upgrading to higher-capacity or higher-efficiency units. Permit records occasionally show electrical permits at the same time as or shortly before HVAC permits, potentially reflecting panel upgrades or circuit additions. However, many HVAC installations don't generate separate electrical permits, so this pattern captures only a subset of projects involving both trades.

• Pool and Landscape: New pool installations frequently appear in permit records alongside landscape or hardscape permits. This pattern likely reflects the substantial backyard disruption pool construction creates, making concurrent landscape work practical. The permits sometimes appear simultaneously, sometimes sequentially over a few months.

• Remodeling and Multiple Trades: Major remodeling permits often correlate with permits for specific trades—plumbing, electrical, HVAC. Kitchen and bathroom remodels typically require plumbing and electrical work, while whole-home remodels may involve HVAC modifications. The permit records show these trades occurring during the same general time frame as the primary remodeling permit.

• Foundation and Plumbing: Foundation repair permits sometimes appear near plumbing permits for the same property. This might reflect foundation issues caused by plumbing leaks, or plumbing problems discovered during foundation work. The causal direction isn't always clear from permit dates alone.

Our service co-occurrence data helps you identify valuable partnership opportunities and build referral networks. When certain services frequently occur together, establishing relationships with contractors in complementary trades creates mutual referral potential.

• Identifying Potential Partners: Our data shows which services commonly pair with your primary business, helping you identify valuable partner types. HVAC contractors can see frequent electrical permit pairings and seek electrician partnerships. Roofers noting solar co-occurrence can connect with solar installers. The patterns reveal natural business connections.

• Timing Referral Opportunities: Use our sequencing data to time your outreach effectively. When solar typically follows roofing by 2-4 months, reach out to customers several weeks after project completion with solar contractor referrals. If electrical work precedes or accompanies HVAC installations, identify electrical needs early in customer interactions.

• Finding Active Partners: Our permit data shows which contractors are active in complementary trades within your market. See which electricians, plumbers, or other tradespeople appear frequently in recent permits—these established businesses make strong potential partners. Focus on contractors with consistent permit activity in your service area.

• Mutual Referral Opportunities: When our data shows bidirectional patterns (both services appearing as "first" at different properties), this indicates reciprocal referral potential. HVAC contractors and electricians both generating leads for each other, or roofers and solar installers with complementary project timelines—the data reveals which partnerships offer mutual benefit.

While permit data captures permitted work and timing patterns, successful partnerships depend on combining this intelligence with careful partner vetting. Use our co-occurrence patterns to identify which trades naturally align with your business, then evaluate potential partners based on service quality, communication, and market reputation.

Focus on consistent patterns with strong statistical support rather than isolated occurrences. Services that pair frequently across dozens or hundreds of properties indicate reliable partnership opportunities. Our data highlights the most common combinations in your specific market, helping you prioritize which complementary trades offer the best referral potential.

Start by reaching out to contractors who appear frequently in permits alongside your trade. These active businesses with established customer bases make natural partnership candidates. Combine our permit intelligence with your direct research—check references, review their work quality, and ensure alignment on customer service standards before formalizing referral arrangements.