St. Louis Water & MSD Sewer Tap Fees (2026)
Two separate agencies serve a typical St. Louis City address: the City of St. Louis Water Division for water, and the Metropolitan St. Louis Sewer District (MSD) for sewer. For a new single-family home connecting to an already-adjacent public sewer, MSD’s published charges are $1,201.00 (a $1,126 connection fee plus a $75 connection permit), rising to $1,501.00 if MSD has to cut a new tap into the main because no wye already exists there. Add the Water Division’s $50.00 turn-on charge and the published city/district total runs $1,251.00 to $1,551.00. The important catch: the Water Division’s own rules say the price of the water tap itself is fixed but not published anywhere online, so your real total will be higher once that number is added.
St. Louis tap and connection charges at a glance
The table below lists every St. Louis City row in our database, each with its source. Two are current 2026 Water Division service charges; the rest are MSD’s connection, permit and plan-review fees, which MSD’s website still shows as effective February 1, 2018 under MSD Ordinance No. 14854 — we found no newer connection-fee ordinance, so those rows carry a “Confirm with utility” flag rather than being presented as freshly set. Rows marked as not paid by a typical home (the fire-protection charge, the metered-account deposit, MSD’s construction-permit and per-foot sewer-extension fees) are real published charges that only apply in specific situations, not to an ordinary infill connection.
| Service | Category | Fee | Meter | Amount | Basis | Effective | Source | Verified |
|---|---|---|---|---|---|---|---|---|
| Sewer — Connection | ||||||||
| Sewer | Connection | Sewer Connection Fee — Single Family Residence | — | $1,126 | flat fee | 2018-02-01 | Official source | 2026-09-30 |
| Sewer — Main Extension | ||||||||
| Sewer | Main Extension | Sewer Construction Inspection Fee — Sanitary & Combined Sewers | — | See formula | per linear foot | 2018-02-01 | Official source | 2026-09-25 Confirm with utility |
| Sewer — Other | ||||||||
| Sewer | Other | Pump Station Review/Inspection Fee | — | $4,000 | per unit | 2018-02-01 | Official source | 2026-09-30 |
| Sewer — Permit | ||||||||
| Sewer | Permit | Connection Permit | — | $75 | flat fee | 2018-02-01 | Official source | 2026-09-30 |
| Sewer | Permit | Construction Permit | — | $195 | flat fee | 2018-02-01 | Official source | 2026-09-30 |
| Sewer — Plan Review | ||||||||
| Sewer | Plan Review | Plan Review — Submittal Charge | — | $450 | flat fee | 2018-02-01 | Official source | 2026-09-30 |
| Sewer | Plan Review | Plan Review Fee — Subdivisions, Commercial Projects, Single Lots, Parking Lots | — | See formula | formula | 2018-02-01 | Official source | 2026-09-25 Confirm with utility |
| Sewer — Tap | ||||||||
| Sewer | Tap | Tap Fee (machine tap into existing sewer main) | — | $300 | flat fee | 2018-02-01 | Official source | 2026-09-30 |
| Stormwater — Main Extension | ||||||||
| Stormwater | Main Extension | Sewer Construction Inspection Fee — Storm Sewers | — | See formula | per linear foot | 2018-02-01 | Official source | 2026-09-25 Confirm with utility |
| Water — Account Setup | ||||||||
| Water | Account Setup | Turn-On Charge (New Flat Rate or Meter Account) | — | $50 | flat fee | 2026-07-01 | Official source | 2026-09-25 |
| Water — Connection | ||||||||
| Water | Connection | Private Fire Protection Connection Service Charge | — | $297 | flat fee | 2026-07-01 | Official source | 2026-09-25 |
| Water — Deposit | ||||||||
| Water | Deposit | Minimum Initial Deposit — New Metered Account (1-inch small service connection) | 1" | $50 | flat fee | 2010-11-01 | Official source | 2026-09-30 |
Worked example for a single-family home in St. Louis
Assume a new house on a street that already has an MSD sewer main and a City of St. Louis water main in front of it, with a standard domestic water service and a new sewer lateral to the public main. MSD states the residential connection fee and permit fee directly in its FAQ on connecting a house to the public sewer, and the same figures appear in its Connection Fees and Development Review Fees schedules. The Water Division’s turn-on charge is from its 2026 Water Rates page.
Published charges for one new single-family home connecting to existing mains (plumber’s and drain layer’s own work not included).
| Case | MSD connection fee | MSD connection permit | MSD tap fee | Water turn-on charge | Total |
|---|---|---|---|---|---|
| Existing wye already on the main (no new tap) | $1,126.00 | $75.00 | $0.00 | $50.00 | $1,251.00 |
| No existing wye (MSD machine-taps the main) | $1,126.00 | $75.00 | $300.00 | $50.00 | $1,551.00 |
MSD’s FAQ is explicit that the $300 figure “may be required if there is no existing wye on the public sewer at the location of the connection” — so which case applies depends on whether an earlier subdivision or builder already stubbed a wye for that lot. Your licensed drain layer or MSD’s Engineering Department (314-768-6272) can tell you which case fits before you apply for the permit.
The water side is where this page has to stop short: the Water Division’s own Policies and Regulations for Small Service Connections (November 2025) says at Section 5.0 that “the installation cost for taps are fixed and are available from the Tap Application Counter” — a real price exists but isn’t published. Call Distribution (314-633-9029) or visit the counter at 4600 McRee Ave. before you budget a final total.
What is not included in St. Louis fees
MSD’s and the Water Division’s charges cover permits, inspection and (for sewer) the physical tap MSD’s crew makes into its own main. Everything else is private work your licensed plumber and drain layer price separately:
- Water service line from the main to the house. National estimate $30–$150 per foot, typically about $50, with trenching in normal soil included. See water service line cost.
- Sewer lateral from the house to the public sewer. National estimate $50–$250 per foot, typically about $100, trenching included. See sewer lateral cost. St. Louis homeowners own and maintain this lateral themselves — MSD points customers to city- and county-sponsored Lateral Line Insurance programs to help cover future repairs, and see how sewer lateral ownership differs by city.
- Street cuts and pavement repair, plus any City of St. Louis or St. Louis County excavation and plumbing permits, separate from the Water Division’s and MSD’s own charges. Hard digging in rock or clay costs more; national estimates put it at 1.2× to 7× the normal-soil rate (see utility trenching cost).
- Septic abandonment, if the lot is converting from a septic system — MSD’s FAQ says the owner needs a separate city or county permit for that.
- Electric service. Ameren Missouri serves the City of St. Louis; its construction-resources pages publish technical specs but no flat dollar figure for a residential connection, so no electric charge is included here.
National figures are estimates from our benchmark set. Put your plumber’s and drain layer’s quotes into the calculator, which loads St. Louis’s official fees:
Estimate utility connection costs
Estimates are planning figures, not quotes. Confirm fees and trench rules with your utility.
When you pay St. Louis connection fees
On the sewer side, only a licensed master drain layer, certified by the Board of Examiners of Plumbers and Drainlayers of St. Louis City or St. Louis County, can apply for MSD’s construction and connection permits, after posting a cash or corporate performance bond of at least $10,000 with MSD. In-person payments can be check or cash; online card payments carry a 2.5% processing fee.
On the water side, a plumbing contractor applies for the tap at the Tap Application Counter — small taps (1″–3″) through Distribution, large taps (6″ and up, or cast-/ductile-iron) through the Estimator — and pays the fixed, unpublished tap-installation cost before the Water Division schedules the work. The turn-on charge is paid separately to open the account, flat-rate or metered.
What could change in St. Louis
- MSD’s connection, permit and tap fees are still displayed on msdprojectclear.org as effective February 1, 2018, under Ordinance No. 14854. We found no newer connection-fee ordinance as of September 2026, but MSD’s board periodically revisits rates; confirm with MSD’s Engineering Department (314-768-6272) before relying on the $1,126/$75/$300 figures for a specific project.
- Water Division service charges (the $50 turn-on charge and the $297 fire-protection charge) auto-adjust every January 1 by the prior year’s CPI-U under the city’s water-rate ordinance, so the published dollar figure can tick up annually even without a new ordinance.
- The unpublished water tap price is the biggest unknown on this page. If a future edition of the Water Division’s small-connection rules or a fee-schedule PDF lists it, this page will be updated to include it in the totals above.
St. Louis tap fee FAQ
How much does it cost to connect a new home to water and sewer in St. Louis?
MSD’s published sewer charges for a single-family home are $1,201.00 with an existing wye or $1,501.00 if MSD has to cut a new tap, and the Water Division charges $50.00 to turn on the account. That’s $1,251.00–$1,551.00 in published city/district charges — not counting the Water Division’s own tap-installation price, which isn’t published online.
Does St. Louis charge a water impact fee or system development charge?
We found no water impact fee in the Water Division’s published rates or connection regulations. The only water charges we could verify are the $50 turn-on charge, a $297 private fire-protection connection charge, and an old $50 metered-account deposit. The dollar cost of the physical water tap is fixed but not published; it’s available only from the Tap Application Counter.
What is MSD’s sewer connection fee for a single-family home?
$1,126.00, plus a $75.00 connection permit, per MSD’s own FAQ and its Connection Fees schedule. An additional $300.00 tap fee applies only if there’s no existing wye already on the public sewer at the connection point.
Why doesn’t St. Louis publish its water tap fee?
The Water Division’s Policies and Regulations for Small Service Connections (November 2025) states the installation cost for taps is fixed but available only from the Tap Application Counter (314-633-9029), not published on the website or in that document. We record only what we can verify, so no dollar figure appears here for that charge.
Is St. Louis City water billed by meter?
Usually not. Most residential properties are billed a flat quarterly rate based on the number of rooms, water closets, baths/showers and sprinkling frontage, per the Water Division’s current water rates. Metered billing is standard for commercial buildings and buildings with seven or more units; single-family owners can opt into a meter.
Who is responsible for the sewer lateral line in St. Louis?
The homeowner. MSD’s FAQ says homeowners are responsible for maintaining the lateral line from the house to the public sewer, and points customers to city- and county-sponsored Lateral Line Insurance programs to help cover future repairs.
For other Midwest utilities, see Kansas City, MO tap and connection fees and Columbus, OH tap fees.
Related: water tap fees · sewer tap fees · water meter installation cost · tap fee vs. impact fee · Nashville fees · Denver fees · utility connection cost calculator
Sources for St. Louis figures
- 2026 Water Rates (rates effective July 1, 2026), Service Charges and Fire Protection Connections, City of St. Louis Water Division (checked Sep 25, 2026)
- Policies and Regulations for Small Service Connections (November 2025), Sections 5.0 and 6.1.6, Table 1, City of St. Louis Water Division (checked Sep 25, 2026)
- Tap Application (small and large service connections), City of St. Louis Water Division (checked Sep 25, 2026)
- Connection Fees, effective Feb. 1, 2018 (MSD Ordinance No. 14854), Metropolitan St. Louis Sewer District (checked Sep 25, 2026)
- Development Review Fees — Plan Review, Permit and Inspection Fees, Metropolitan St. Louis Sewer District (checked Sep 25, 2026)
- Frequently Asked Questions — How do I connect my house to the public sewer? / Who is responsible for the sewer lateral line?, Metropolitan St. Louis Sewer District (checked Sep 25, 2026)
- Construction Permit Requirements, Metropolitan St. Louis Sewer District (checked Sep 25, 2026)