Quick Mattress Store Comparisons
Here's a fast look at all four Thornton stores side by side so you can zero in on the right fit before you ever leave the house.
| Store Name | Specialty | Price Range | Best For |
|---|
| American Furniture Warehouse | Full home furnishings including mattresses | Budget to mid-range | One-stop furniture and mattress shopping |
| Living Spaces | Modern furniture and sleep products | Mid-range to upper-mid | Style-forward shoppers furnishing a whole room |
| Mattress Firm Clearance Center Thornton (Elite Retailer) | Mattress-only specialist with clearance pricing | Budget to mid-range | Audience favorite - deals on name-brand mattresses |
| Mattress Kingdom | Local independent mattress retailer | Budget to mid-range | Personal service from a local shop |
Top Mattress Stores in Thornton
Let's walk through each store in detail. These four cover pretty much every type of shopper in Thornton, from the bargain hunter to the person who wants a salesperson to actually sit down and talk through options.
American Furniture Warehouse
American Furniture Warehouse on Grant Street is one of the biggest furniture stores in the Denver metro area, and the Thornton location is no exception - we're talking a massive showroom where you can test mattresses and pick out a bed frame in the same trip. If you hate the idea of bouncing between stores, this is your place. They carry a wide selection of mattress brands alongside their furniture, which makes coordinating a whole bedroom setup surprisingly painless.
Queens start around $300 on the low end, and you can find solid mid-range options in the $700 to $1,200 range. They stock innerspring, memory foam, and hybrid styles from familiar brands.
Best for: One-stop shoppers who want furniture and a mattress in a single visit
Contact: 8501 Grant St, Thornton, CO 80229
Website: Visit their website
Phone: +1-303-289-3311
Living Spaces
Living Spaces sits up on Washington Street in the northern part of Thornton and draws a crowd that cares as much about how the bedroom looks as how the mattress feels. The showroom is bright and well-organized, and they do a nice job of presenting mattresses within full bedroom vignettes so you can actually picture everything together. Their sleep product selection leans toward the mid-range and includes hybrids and memory foam options from brands you'll recognize.
Queens typically start around $500 and run up into the $1,500 range depending on the brand and construction. They also carry adjustable bases, which are worth asking about if you're buying a new frame anyway.
Best for: Style-forward shoppers who want the mattress and the room to work together
Contact: 16395 Washington St, Thornton, CO 80023
Website: Visit their website
Phone: +1-877-266-7300
Mattress Firm Clearance Center Thornton
This location on East 120th Avenue is a Mattress Firm Clearance Center, which means the selection skews toward open-box, floor models, and previously returned mattresses - all at a discount. It comes highly recommended by our audience, and shoppers in Thornton consistently point to it as the place to go when you want a name-brand mattress without paying full retail. Because it's a clearance-focused store rather than a standard Mattress Firm, inventory changes frequently, so it rewards return visits if you don't find exactly what you want on the first trip. (Elite Retailer)
Prices vary with inventory, but queens on clearance often run significantly below what you'd pay at a standard location - think $200 to $800 for options that originally retailed much higher. Brands like Sealy, Serta, and Beautyrest show up regularly.
Best for: Audience favorite - deals on name-brand mattresses at clearance pricing
Contact: 1181 E 120th Ave D, Thornton, CO 80233
Website: Visit their website
Phone: +1-720-377-0463
Mattress Kingdom
Mattress Kingdom over on West 84th Avenue is an independent local shop, and that matters more than it might sound. You're not dealing with a rotating cast of commission-driven reps following a corporate script - you're talking to people who work there consistently and tend to know the inventory well. It's a smaller store, which actually makes the shopping process feel less overwhelming.
Queens start around $300 and the shop carries a range of comfort styles. If you're someone who prefers a conversation over a self-guided showroom tour, this is worth a visit.
Best for: Shoppers who want personal attention from a local, independent retailer
Contact: 321 W 84th Ave #4, Thornton, CO 80260
Website: Visit their website
Phone: +1-303-452-4569
Delivery Considerations
Before you finalize any purchase, it's worth having a clear conversation with the store about delivery. In the Thornton area, most stores offer delivery windows that run anywhere from same-week to two to three weeks out depending on what's in stock. Clearance or floor-model purchases at places like the Mattress Firm Clearance Center on 120th often have faster turnaround since the item is already on-site.
Ask specifically about whether setup and old mattress haul-away are included or cost extra. American Furniture Warehouse and Living Spaces both handle full-room furniture deliveries regularly, so they tend to have structured delivery programs - but fees and included services change, so confirm at the time of purchase. Smaller stores like Mattress Kingdom may offer more flexibility on scheduling.
If you're buying online or comparing options, our mattress shopping checklist includes a section specifically on delivery questions worth asking before you sign anything. Getting the haul-away and setup details sorted before delivery day saves a lot of hassle.
Mattress Buying Guide
Knowing what you actually need before you walk into a store makes the whole experience faster and less stressful. Here's a quick breakdown of the three things that matter most.
Understanding Firmness Levels
Firmness is personal, and showroom labels like "plush" or "firm" aren't standardized across brands. One company's medium is another's firm. The best approach is to lie on a mattress for at least five to ten minutes in your actual sleep position - side, back, or stomach - rather than just pressing on it with your hand.
Side sleepers generally do better with softer to medium options that allow the hips and shoulders to sink in slightly. Back and stomach sleepers usually want something firmer to keep the spine aligned. If you share the bed with a partner who sleeps differently, a split-feel mattress or a medium hybrid is often a reasonable middle ground.
Our full mattress buying guide goes deeper on how different materials affect feel over time, which is worth reading before you test anything in store.
Size Selection Strategy
The size question seems simple until you get the mattress home and realize a king doesn't fit through the hallway or leaves no room to walk around the bed frame. Measure your bedroom before you shop - not just the floor space, but doorways and any tight corners the delivery crew will have to navigate.
A queen is the most common choice for couples in a standard bedroom, roughly 60 by 80 inches. A king adds a full foot of width, which sounds great until you're also buying a king-size frame, sheets, and a duvet. Our mattress size guide has a room-size chart that makes this decision a lot easier.
Budget Planning
A reasonable budget for a quality queen mattress that will last eight to ten years runs somewhere between $700 and $1,400 at most Thornton stores. You can spend less and find something decent - the clearance options at Mattress Firm on 120th are a good example - but below $300 you're generally looking at a mattress that wears out faster.
Don't forget to factor in the base. An adjustable base can add $500 to $1,500 to your total, while a simple platform frame runs $150 to $400. Some stores bundle these together with promotional pricing, so it's worth asking. If you want a quick estimate before you shop, try the mattress budget calculator to set realistic expectations going in.
Prefer Shopping Online?
If the idea of spending a Saturday afternoon driving between stores doesn't appeal to you, Sleepology is worth a serious look. They operate without sales commissions, which removes the pressure dynamic you sometimes feel in a showroom. Their "double-the-difference" price match guarantee and Price Predictor tool mean you're not left wondering whether you paid too much. They carry premium mattress brands all in one place, with transparent pricing and no haggling involved. Delivery is white glove and done in-home. Right now, you can get free delivery using the code DELIVERY at checkout - just use this link to apply the code automatically. For Thornton shoppers who want a low-stress experience without sacrificing quality, it's a genuinely solid option.
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