Why Northeast Florida homeowners call Langston’s
You get the owner
Not a dispatcher, not a rotating crew. The person who diagnoses it is the person accountable for it.
Price before the work
Flat-rate repair pricing approved by you before a single part comes off the truck.
Licensed & insured in Florida
Florida Certified Mechanical Contractor CMC1251311, EPA 608 Universal certified, insured on every job.
Local, across 8 counties
Jacksonville-based, covering eight Northeast Florida counties — not a franchise routing your call out of state.
Military, first responders & seniors
10% off residential repair or installation, as thanks for the obvious reasons. Mention it when you call or book so it is on the invoice from the start.
Residential service. Mention at booking — it cannot be applied after an invoice is closed.
$129 diagnostic, waived with repair
The residential diagnostic is $129, and it comes off the bill entirely if you approve a recommended repair over $250. You still get the diagnosis, the readings, and the written price either way.
Applies when you accept a recommended repair over $250. Commercial diagnostic is $149, waived on repairs over $300.
Rebate help on qualifying mini-splits
Qualifying ductless mini-split installations may be eligible for a JEA rebate. We will check whether your install and your account qualify, and help with the paperwork rather than leaving you to find it.
Eligibility and rebate amounts are set by JEA, not by us, and are not guaranteed. Qualifying equipment and account required.
Send a neighbor our way
Most of this business comes from someone telling someone else. If you refer a neighbor, a tenant, or a fellow property manager, let us know so we can thank you properly.
Call or email to let us know who you sent. Reward details are confirmed at the time of referral.
Mention the discount you want when you call or book. That is the whole process — there is no code to enter and no coupon to print.
The fine print
Questions people ask before booking
Planning a replacement instead? Financing options are listed separately, with what to compare before you sign.
Can discounts be combined?
Ask when you book. The diagnostic waiver and the 10% service discount are different things and frequently apply to the same visit. Stacking two percentage discounts on the same line item generally is not available.
What proof do you need for the military, first responder, or senior discount?
Nothing complicated. Mention it when you book and bring the relevant ID to the appointment if you have it. We are not going to make a veteran produce paperwork to save ten percent.
Can you apply a discount after the fact?
Not once an invoice is closed and paid — that is an accounting problem, not a willingness one. Mention it when you book and it is handled from the start.
Do discounts apply to commercial work?
The 10% discount is for residential service. Commercial pricing, including the commercial diagnostic and its waiver, is handled separately — call and ask about your account.
What customers say
The reviews that matter are the ones about what actually got fixed
Not stock photos and slogans — specific jobs, specific outcomes, from homeowners and property managers across Northeast Florida.
38 Google reviews
“Mr Gary is a one of a kind gem if you need air conditioning service or repairs he's the guy to go to. Mr Gary is very thorough and persistent in locating the issue and is upfront and honest about his findings.”
Google review · AC service
“The technician was very prompt and immediate found the issue. My air was back working in no time.”
Google review · AC repair