Residential sewer and septic permits in Baltimore County, MD
245 residential sewer and septic permits issued by Baltimore County (plumbing), Baltimore County (electrical), Baltimore County (building), Baltimore County (gas), the 8 weeks ending Oct 17, 2026. Oct 17, 2026 is the latest issue date the source has published.
Quick answer. In the 8 weeks ending Oct 17, 2026, 245 residential sewer and septic permits were issued in Baltimore County, MD, according to public records from Baltimore County (plumbing), Baltimore County (electrical), Baltimore County (building), Baltimore County (gas). The busiest ZIP codes were 21227 (16 permits), 21128 (15 permits), 21220 (13 permits). The median declared value was $18,950 across 5 permits that list one. The latest permit date published is Oct 17, 2026.
What a sewer and septic permit means in Baltimore County
A residential sewer or septic permit covers lateral repairs, replacements, connections and septic systems. For a sewer contractor it marks blocks where old pipe is failing.
In Baltimore County, permits were issued on 36 different days in the window; the most recent were Oct 16, 2026, Oct 15, 2026, Oct 13, 2026. The busiest ZIPs were 21227 (16), 21128 (15), 21220 (13).
By residential sewer and septic permit count, Baltimore County ranks #4 of the 31 sewer and septic pages on this site and #1 of 2 in MD.
- Mail the block around each lateral job.
- Offer camera inspections to same-age houses nearby.
- Track which ZIPs replace the most laterals.
Other work on the same permits
Share of these 245 permits whose type or description also matches another trade. These are the follow-on and partner trades on Baltimore County jobs.
- plumbing: 228 permits (93%)
- general remodel: 94 permits (38%)
- new construction: 44 permits (18%)
- water heater: 29 permits (12%)
Weekly trend
Permits per 7-day period, ending Oct 17, 2026. n/c = not collected yet (before our pipeline started pulling this source). It is not zero. Striped bars are partly collected weeks.
Top permit types
| Permit type / subtype | Permits | Share |
|---|---|---|
| RESIDENTIAL PLUMBING | 227 | 93% |
| RESIDENTIAL ELECTRICAL | 12 | 5% |
| Residential Razing / Res. Permit - Razing SFD | 2 | 1% |
| Residential Razing / Res. Permit - Razing SFA | 1 | 0% |
| Residential Razing / Res. Permit - Razing AGRICULTURE | 1 | 0% |
Busiest ZIP codes
| ZIP | Permits | Share | 8-wk avg / week |
|---|---|---|---|
| 21227 | 16 | 7% | 2.00 |
| 21128 | 15 | 6% | 1.88 |
| 21220 | 13 | 5% | 1.62 |
| 21136 | 12 | 5% | 1.50 |
| 21228 | 12 | 5% | 1.50 |
8-wk avg / week is the trailing 8-week weekly average we quote in coverage checks for that ZIP and trade. It counts every source in the ZIP and includes permits with unknown use, so it can be higher than this page's residential count.
Work stated in the permit
| Work | Permits | Share |
|---|---|---|
| sewer connection / cap | 112 | 46% |
| septic | 80 | 33% |
| lateral repair / replace | 73 | 30% |
Parsed from the permit's own type and work text. A permit can state more than one; many state none.
Sample rows
Anonymized: street address, permit number and any names removed. Subscribers get the full row with address, permit number and source link.
| Issued | ZIP | Permit type | Scope | Work | Declared value |
|---|---|---|---|---|---|
| 2026-10-16 | 21244 | RESIDENTIAL PLUMBING | plumbing + remodel + sewer | lateral repair / replace; sewer connection / cap | n/a |
| 2026-10-05 | 21030 | RESIDENTIAL PLUMBING | plumbing + sewer | septic | n/a |
| 2026-09-28 | 21227 | RESIDENTIAL PLUMBING | plumbing + remodel + sewer | lateral repair / replace; sewer connection / cap | n/a |
| 2026-09-16 | 21227 | RESIDENTIAL ELECTRICAL | electrical + sewer | septic | n/a |
| 2026-09-10 | 21237 | RESIDENTIAL PLUMBING | plumbing + remodel + sewer | lateral repair / replace; sewer connection / cap | n/a |
| 2026-08-31 | 21155 | RESIDENTIAL PLUMBING | plumbing + new construction + sewer | septic | n/a |
Source
- Baltimore County (building): Permit records on bcgisdata.baltimorecountymd.gov, published by Baltimore County (building). Source dataset. Collected window(s): Aug 22, 2026 – Oct 16, 2026. Last pulled Oct 18, 2026.
- Baltimore County (electrical): Permit records on bcgisdata.baltimorecountymd.gov, published by Baltimore County (electrical). Source dataset. Collected window(s): Aug 23, 2026 – Oct 17, 2026. Last pulled Oct 18, 2026.
- Baltimore County (gas): Permit records on bcgisdata.baltimorecountymd.gov, published by Baltimore County (gas). Source dataset. Collected window(s): Aug 22, 2026 – Oct 16, 2026. Last pulled Oct 18, 2026.
- Baltimore County (plumbing): Permit records on bcgisdata.baltimorecountymd.gov, published by Baltimore County (plumbing). Source dataset. Collected window(s): Aug 22, 2026 – Oct 16, 2026. Last pulled Oct 18, 2026.
Metric: Residential = the source marks the permit's use as residential (permits with commercial or unknown use are not counted). Sewer & Septic = the permit's type or work description matches the Curbside Signal sewer and septic rules. Counts exclude void or cancelled permits. Dates are the jurisdiction's permit issue date. Records are deduplicated on source and permit number. How we count. Part of the Baltimore-Columbia-Towson, MD metro: every trade × city page there.
The honest limit. A permit usually means the job is already sold. We say that up front. The value is what happens around it:
- Neighbor marketing around active jobs: same-age houses on the same street.
- Cross-trade follow-on demand: new roof → solar, gutters, insulation; remodel → HVAC, electrical, landscaping, pool; new build → pest, security, landscaping.
- Competitor intelligence: which contractors pull permits where (where the jurisdiction publishes it), and who to recruit as subs.
- Early-stage projects for commercial trades and GC subs.
Follow-on: Sewer work follows repipes, remodels and new construction, and leads to landscaping repair.
Other trades in Baltimore County, MD
Residential permits in the same window, by trade.
Questions
How many residential sewer and septic permits were issued in Baltimore County, MD recently?
245 residential sewer and septic permits in the public records we pulled, the 8 weeks ending Oct 17, 2026. Source: Baltimore County (plumbing), Baltimore County (electrical), Baltimore County (building), Baltimore County (gas).
Which Baltimore County ZIP codes have the most sewer and septic permits?
21227 (16 permits), 21128 (15 permits), 21220 (13 permits), by residential sewer and septic permit count the 8 weeks ending Oct 17, 2026. 38 ZIP codes had at least one permit.
What is the median declared value of a residential sewer and septic permit in Baltimore County?
$18,950, across 5 permits that list a valuation. Declared values are what the applicant stated on the permit, not the contract price.
How do I get the Baltimore County sewer and septic permit list, and what does it cost?
Request a free sample for your ZIPs first. ZIP Pack is $29/mo for one trade and up to 5 ZIPs every Monday; Metro Feed is $99/mo for a whole metro and up to 3 trades, with daily alerts. Guarantee on every package: If a weekly file is late or missing, that month is free. If a month delivers under half the 8-week average permit count for your ZIPs and trade, the next month is free.
Baltimore County sewer and septic leads, every Monday
Send your trade and ZIP codes. We'll reply with a real sample from the public records we pull, or tell you plainly that we don't cover you yet.