Moving to Centennial? The New-Home Rekey Guide (2026)

August is the busiest closing month of the year in the south metro, and Centennial — with its deep bench of 1970s-to-90s family neighborhoods — takes a big share of it. If you just picked up keys on a place near Southglenn or Willow Creek, you have probably already forwarded the mail, switched the utilities, and updated your address in forty different apps. Here is the item most new owners skip: the front door still answers to every key ever cut for it. This guide covers who actually has those copies, whether to rekey or replace, what Centennial's housing stock changes about the decision, the HOA question, a move-week timeline, and real prices from our published list.

Who can still open your front door after closing

Colorado closing paperwork transfers title. It does nothing to key control. By the time a typical Centennial house sells, working copies of the entry keys have passed through more hands than anyone can reconstruct:

• The sellers and their family — plus the copy in a relative's junk drawer nobody remembers cutting
• The listing agent and the lockbox — during the listing period, any showing agent with lockbox access could open the door
• The inspector and appraiser — usually via that same lockbox key
• Contractors — the crew that did the pre-listing bathroom repaint or fixed the inspection punch list often held a key for days
• Neighbors — the classic plant-watering and dog-letting-out copies, handed out over years
• Former tenants — if the home was ever a rental, multiply everything above by each lease

None of this assumes bad faith. The problem is simpler: the number of live keys is unknowable, and the only way to make it zero is to change what the cylinder accepts.

Rekey vs replace: the decision in one table

Rekeying swaps the pins inside your existing cylinders so every old key stops working and a fresh key runs the house. Replacement swaps the whole visible unit. Same security outcome against old keys either way — very different invoices.

The numbers, straight from our published Denver metro price list: rekeying runs $19–$35 per cylinder plus a $79–$99 service call, so a typical four-cylinder home lands at $155–$239 all-in with up to five new keys cut on site. Smart-lock and high-security cylinders rekey at $45–$95. Full replacement starts around $65–$125 labor per lock plus hardware, and a fresh deadbolt bore runs $125–$220 plus hardware. That gap — roughly three to four times the cost for the same old-keys-stop-working outcome — is why rekeying wins for most move-ins.

What Centennial's housing stock changes

Most of the homes we rekey in Centennial were built between the early 1970s and the late 1990s — Southglenn, Cherry Knolls, Nob Hill, Hunters Hill, Willow Creek, Homestead in the Willows. That age shows up at the front door in predictable ways:

• Original or second-generation entry sets. A lot of these doors still carry hardware from the 80s or 90s. If it turns smoothly, it rekeys fine. If it grinds, droops, or needs a jiggle ritual, the cylinder may be past service life — that is the honest case for replacement, and we tell you at the door before charging to repin anything.
• Settled doors and misaligned strikes. Fifty-year-old framing moves. Half the "broken lock" calls in older Centennial blocks are really strike-plate alignment, which we adjust during the rekey visit instead of selling you hardware.
• A growing smart-lock layer. Newer pockets near the Dry Creek corridor and plenty of retrofits mean the rekey visit often includes a smart lock — see the timeline below for the reset steps that matter.

The practical upshot: in this housing stock, a rekey appointment doubles as a hardware inspection. You end the visit either with rekeyed locks or with a straight answer about which one door actually deserves new hardware.

The HOA note

Centennial is HOA country, and buyers sometimes stall on lock work because they assume it needs approval. It almost never does. HOA architectural rules govern what the exterior looks like — finish, style, visible hardware. Rekeying changes pins inside the cylinder and leaves the outside identical, so there is nothing to approve. Where covenants can bite is full replacement in a different finish, or adding a visible keypad in stricter communities: skim your covenants first, or ask us to match the existing finish so the question never comes up.

Your move-week timeline

1. Three days out: book with your closing date and address. We confirm scope by phone — how many exterior doors, any smart locks, keyed-alike or not — so the quote you hear is the all-in number.
2. Closing day: rekey within hours of keys-in-hand. Evening slots run to midnight, which matters when closings drag past five. Same visit: key everything alike, including the garage service door most people forget.
3. Day one: factory-reset any smart lock, re-pair it to your phone, set fresh keypad codes, and delete the lock from the seller's app account. Reset the garage keypad and re-pair the opener remotes — an opener remote is a key too.
4. First week: set a spare-key plan that is not the doormat, check the sliding-door and window latches while the house is still empty, and sort the mailbox: USPS cluster boxes go through the post office, but a private mailbox lock we can swap on the spot.

What it costs in Centennial

Centennial's 80112, 80121, and 80122 sit inside our core zone, so there is no distance surcharge — the ranges above are the ranges you pay, confirmed by phone before a tech rolls. We work 7 AM to midnight, seven days; after 9 PM a flat $30–$50 late-evening add applies and is stated up front, never a percentage. Full context lives on the 2026 price list, the Centennial house-rekeying page, and the main house rekeying service page. For the broader decision framework beyond move-ins, our rekey-vs-replace guide goes deeper.