A Granville septic-to-sewer conversion: the actual numbers on a real Licking County home

The starting point

A 1995 home in Granville on a 0.6-acre lot near the edge of the village. The drain field was installed when the home was built and had reached 30 years of service. Symptoms started in fall 2025: soggy patch above the field after every rain, slow drains during heavy household water use, sewage smell on humid afternoons. A pump-and-inspection in November 2025 confirmed the field was at end of life.

The Licking County Health Department gave the homeowner three options.

Option 1: Full drain-field replacement, conventional gravity. Lot perc test results required mound system instead because of soil conditions. Quote: $11,800.

Option 2: Aerobic treatment unit (ATU) plus existing drain field, retrofit to surface discharge under Ohio EPA NPDES permit. Quote: $14,200 plus $400 annual O&M contract.

Option 3: Septic-to-sewer conversion. The sanitary sewer main reached the street in 2018 but the homeowner declined to connect at that time. Connection now: $7,400 (140 feet of trench plus tie-in) plus septic tank abandonment ($1,800).

The grant subsidy

The Licking County Health Department and the regional sewer authority ran a sewer-conversion grant program in early 2026 covering 40 percent of sewer-side connection costs for income-qualifying households. The homeowner qualified at the moderate-income tier.

Grant coverage: $2,960 (40 percent of $7,400 connection cost). Net out-of-pocket connection: $4,440. Plus septic abandonment: $1,800. Total out-of-pocket: $6,240.

For comparison, the cheapest other option (Option 1, mound system replacement) was $11,800 out of pocket.

Net savings choosing conversion over mound replacement: $5,560.

The timeline

• Late 2025: Symptoms develop, pump-and-inspection confirms end of life.
• December 2025: Three quotes obtained. Owner identifies grant program through the Licking County Health Department.
• January 2026: Grant application filed. Documentation included tax records, perc-test results (showing soil conditions), and the three competing quotes.
• February 2026: Grant approved at the 40-percent tier.
• March 2026: Permits filed with the Licking County Health Department and the regional sewer authority. Tie-in scheduled for first available window.
• Early April 2026: Connection trench excavated. Sewer service from main to house line completed in 2 days. House plumbing modification (tie household drain into sewer service) completed in 1 day.
• Mid-April 2026: Septic tank abandonment: pump-out, structural collapse, fill with engineered material per Licking County HSTS abandonment specification. Final county inspection sign-off.
• Late April 2026: Lawn restoration completed. Sod laid over the connection trench.

Total project window: roughly 4 months from grant approval to final sign-off. Most of the time was permit-office workload and waiting for the next available trench-crew schedule.

The 6-month follow-up math

Six months on city sewer (April through October 2026):

• Monthly sewer fees: $52 average through the regional authority, totaling $312 over 6 months.
• No septic maintenance: The previous baseline was pump-and-inspect every 4 years at $450, plus annual filter cleaning at $75. Amortized: roughly $148/year, or $74 over 6 months.
• No alarm calls, no surprise pump-outs, no soggy lawn: Conservative annualized peace-of-mind value of $200, or $100 over 6 months.

Net incremental cost vs continuing on septic over 6 months: about $138 ($312 sewer minus $74 amortized septic minus $100 peace-of-mind credit).

Annualized incremental cost: about $276/year permanent.

What this case shows for other Granville and Licking County homeowners

Five takeaways from the 6-month follow-up.

1. Active sewer-conversion grant programs are the single largest variable in the math. Without the 40-percent grant, conversion would have been $7,400 connection plus $1,800 abandonment = $9,200, only marginally cheaper than the $11,800 mound replacement. With the grant, conversion was $5,560 cheaper.

2. Watch for the grant approval window. The 2026 program opened in January and closed when funding was exhausted (typically June or July). The homeowner caught the program in its first quarter. Later applicants who hit the same field-failure pattern in fall 2026 will need to wait for the 2027 program.

3. The Licking County abandonment specification is strict. The tank cannot just be filled with dirt; the spec requires a structural collapse (or removal) and engineered fill material to prevent future ground subsidence. The contractor crews handling abandonment carry the right material and complete the work in 1-2 hours, but a DIY or non-credentialed approach commonly fails the final inspection and requires re-work.

4. Sewer-tie-in trenches are the biggest unknown in pricing. This Granville case ran 140 feet, which is in the middle of the typical Central Ohio range (40 to 400 feet depending on lot configuration). The trench cost dominates the conversion total; a 50-foot tie-in might have been $3,500 in total connection cost while a 300-foot tie-in could have been $14,000.

5. The math flips for homeowners staying 15+ years. At $276/year permanent incremental cost, 15 years on sewer is $4,140 in cumulative fees vs roughly one drain-field replacement ($8,000-$15,000). If you plan to own the home 25+ years and have replacement room on the lot, staying on septic can pencil out. The reverse is true when the field is at end of life and grant programs are open.

Central Ohio grant landscape

As of August 2026, three active or recently-active program types across the Greater Columbus and Central Ohio region. Check current status before relying on any pricing math.

• Licking County Health Department + regional sewer authority (the program in this case study): 30 to 40 percent grant coverage on sewer-side costs, income-qualifying, 2026 round closed but 2027 round expected to open in January.
• Delaware Public Health District + Del-Co Water and county sewer districts: 40 to 60 percent grant coverage, income-qualifying, 2026 round still active as of August in some townships. Apply through the district directly.
• Fairfield Department of Health: 25 to 40 percent grant coverage, intermittent. Check current round status.

Free phone consultations include grant-status triage. We track the active rounds because half the conversion projects we see each year depend on which programs are open.