How much does service call or diagnostic fee cost in Northeast Florida?

Typically $49 to $125. Often credited if you approve the repair

How much does replace 40 to 50 gallon tank water heater cost in Northeast Florida?

Typically $1,400 to $2,600. Includes permit, pan and expansion tank

How much does whole-house pex repipe (3 bedroom) cost in Northeast Florida?

Typically $6,000 to $14,000. Drywall patching usually extra

What plumbers cost in St. Johns County (2026)

Job	Typical range
Service call or diagnostic fee Often credited if you approve the repair	$49 – $125
Clear a clogged drain (single fixture)	$150 – $350
Main sewer line cleanout with camera	$300 – $650
Replace 40 to 50 gallon tank water heater Includes permit, pan and expansion tank	$1,400 – $2,600
Install tankless gas water heater	$3,200 – $5,800
Replace toilet (standard, supplied by plumber)	$350 – $700
Repair or replace garbage disposal	$250 – $550
Whole-house PEX repipe (3 bedroom) Drywall patching usually extra	$6,000 – $14,000

Job

Typical range

Service call or diagnostic fee

Often credited if you approve the repair

$49 – $125

Clear a clogged drain (single fixture)

$150 – $350

Main sewer line cleanout with camera

$300 – $650

Replace 40 to 50 gallon tank water heater

Includes permit, pan and expansion tank

$1,400 – $2,600

Install tankless gas water heater

$3,200 – $5,800

Replace toilet (standard, supplied by plumber)

$350 – $700

Repair or replace garbage disposal

$250 – $550

Whole-house PEX repipe (3 bedroom)

Drywall patching usually extra

$6,000 – $14,000

What changes the price

Age of the house and what the existing pipes are made of

Slab versus crawlspace access, since most St. Johns County homes are on slabs

Permit and inspection requirements for the specific job

Emergency, after-hours or holiday timing

Whether the home is on well and septic rather than county water and sewer

Local tips

Ask for the flat price before anyone starts, and get it in writing by text or email

Replace your water heater on your schedule around year 10, not after it floods the garage

Be wary of anyone who pushes a whole-house repipe on the first visit without a camera or pressure test

Know where your main shutoff is, usually at the meter box by the street or on the exterior wall near the garage

Top-rated plumbers near you

Kingdom Based Plumbing

5.01020 Google reviews

Plumber · Fruit Cove

450-106 State Road 13 North, Fruit Cove

Plumber in Fruit Cove, FL

Call now(904) 814-8541

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Ranges are estimates from local quotes and public price data; your price will vary. 904biz is not a party to any work. Local plumbers: think a number is off? Tell us.

First Coast Home Solutions, LLC

5.0271 Google reviews

Plumber · St. Augustine

789 Athens Drive, St. Augustine

Plumber in St. Augustine, FL

Call now(904) 342-2178

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