FAMILY-OWNED · CASTLE ROCK, CO
WE BUILT HOSPITALS.
NOW WE FIX YOUR HOUSE.
23 years of commercial plumbing and HVAC — hospitals, water plants, airports — brought to houses across Castle Rock, Parker, Highlands Ranch, Centennial, Littleton, south Denver and Aurora. Flat rates. No surprises.
- Licensed & insured
- Flat-rate quotes
- Plumbing, HVAC & boilers
WHAT DO YOU NEED DONE?
Four lines of work, one crew, one standard. Pick the closest fit — we'll sort the rest on the phone.
Plumbing
Drains, water heaters, fixtures, re-pipes and the gas lines nobody else wants to touch.
7 SERVICESHVAC
Furnaces, air conditioning and boilers — sized for Colorado, not for a rule of thumb.
3 SERVICESRemodels & New Construction
The plumbing side of bathrooms, kitchens, basements, custom homes and ground-up commercial.
7 SERVICES
WHY ALLEN & SONS
Clayton Allen spent 23 years on Colorado's hospitals, water treatment plants, airports, hotels and high-rises. In 2020 he pointed that standard at houses. Same code knowledge, same inspection discipline — on your water heater.
Need someone today?
Leaks, no heat, no hot water — call during business hours and we will work it into the day if we can. The phone beats the form every time.
CALL (303) 957-6200Commercial background
23 years on hospitals, water plants, airports and high-rises. Houses are the easy part.
Flat rates, quoted first
You get a number before we start. It does not change because the job ran long.
Licensed and insured
Permitted where permits are required. We do not skip the inspection to save an afternoon.
Independent — no PE, no franchise
Founded in 2020 and still family-owned. No franchisor and no private-equity owner setting the prices.
THE CREW THAT SHOWS UP
No dispatch roulette. These are the people who will be standing in your basement.
Clayton Allen
Founder & Owner
WHERE WE WORK
Based in Castle Rock, running north-east to Aurora, south to Monument and east to Elizabeth. Just outside it? Call and ask — we often can, and we would rather tell you straight than have you guess.
- Castle RockHome base — fastest response
- ParkerMinutes away, across Douglas County
- Highlands RanchIncluding Lone Tree
- LittletonFull plumbing and HVAC service
- MonumentTri-Lakes and the north end of El Paso County
- South DenverThe south metro, up to central Denver
Also servingSedalia · Franktown · Centennial · Elizabeth · Greenwood Village · Aurora
QUESTIONS PEOPLE ASK FIRST
What areas does Allen & Sons serve?
Allen & Sons works out of Castle Rock, Colorado, and serves Parker, Highlands Ranch, Sedalia, Franktown, Littleton, Centennial, Greenwood Village, south Denver, Aurora, Elizabeth and Monument. That is roughly 35 miles out from Castle Rock, though the area runs further north-east than it does west. If you are just outside it, call and ask.
What are your hours?
Monday to Friday, 8:00 am to 5:00 pm. Allen & Sons is closed on Saturdays and Sundays and does not run an after-hours emergency service. Calls and form requests that arrive outside those hours are picked up the next business morning.
How does your pricing work?
Flat rate. We look at the job, give you a number, and that number is what you pay. There is no hourly meter and no line items you did not agree to. The quote comes before anyone opens a toolbox.
How fast can you get here?
For an active leak, no heat or no hot water, call during business hours rather than using the booking form — the phone is faster and urgent jobs get worked into the day. Routine work is usually scheduled within a couple of days.
Are you licensed and insured?
Yes. Allen & Sons is licensed and insured in Colorado, and we pull permits ourselves on any job where a permit is required rather than skipping the inspection.
Do you do both plumbing and HVAC?
Yes. Allen & Sons covers residential plumbing, furnaces, air conditioning and boilers, plus the plumbing side of remodels and ground-up new construction. Plumbing can be booked online. HVAC is scheduled by phone, because it runs through one technician whose calendar the office checks first.
Do you work on boilers?
Yes. Allen & Sons services and replaces boilers and radiant heating as well as forced-air furnaces. Boilers are a specialism plenty of HVAC companies will not touch, and hydronic systems are a large part of what the crew came out of commercial work knowing.
Is Allen & Sons a franchise or owned by private equity?
Neither. Allen & Sons is independent and family-owned. There is no franchisor and no private-equity owner setting prices or service scripts — Clayton Allen owns it and is on job sites.
Who owns Allen & Sons?
Clayton Allen founded the company in 2020. He has worked in the trade since 1997, including 23 years of commercial plumbing and mechanical work on Colorado hospitals, water treatment plants, airports, hotels and high-rises. It is family-owned and he is on job sites.
STILL SCROLLING? THE PIPE ISN'T.
Call and talk to a plumber, or send the details and pick a window. Either way you get a flat-rate number before anyone turns a wrench.