A double king size bed can cost about $2,500-$9,000 in the United States when it means two standard king mattresses placed side by side on an oversized frame. Buyers typically pay around $5,200, with mattress quality, custom frame construction, bedding, delivery, and room access driving the total. Because “double king” is not a standard U.S. mattress size, confirm the intended dimensions before comparing quotes.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Two king mattresses | $1,000 | $2,400 | $5,000 | Two standard 76-by-80-inch mattresses |
| Oversized bed frame | $700 | $1,800 | $4,500 | Reinforced, custom-built frame |
| Foundation and supports | $250 | $600 | $1,400 | May require center supports and separate foundations |
| Oversized bedding | $200 | $700 | $1,800 | Custom sheets or two sets of king bedding |
| Delivery and setup | $150 | $350 | $800 | Distance, stairs, and assembly affect charge |
| Typical installed total | $2,500 | $5,200 | $9,000 | Premium materials or difficult access can exceed this range |
What two king mattresses and a custom frame usually cost
For a complete double-king arrangement, budget roughly $2,500-$9,000 before unusual room modifications. This estimate assumes two separate 76-by-80-inch king mattresses, a frame about 152 inches wide, ordinary residential access, and midrange U.S. labor and delivery. The combined sleep surface measures about 152 by 80 inches, or 12 feet 8 inches by 6 feet 8 inches, before adding the frame perimeter.
At the low end, two entry-level foam mattresses may cost $500-$900 each, paired with a basic reinforced platform frame. A typical midrange setup uses mattresses priced around $900-$1,500 each and a made-to-order wood or metal frame. A premium build can use latex or high-end hybrid mattresses, a hardwood frame, upgraded foundations, and custom bedding.
Price per sleeping surface is another useful comparison. Two mattresses commonly run $6-$31 per square foot of mattress surface, based on a combined 84.4 square feet. A custom frame may add about $5-$34 per square foot of bed footprint, though shops generally quote frames by design and materials rather than square footage.
Some shoppers use “double king” to mean a split king, which is two Twin XL mattresses side by side. That arrangement is still 76 inches wide and 80 inches long, the same outside dimensions as one standard king bed. A split king mattress set is often $1,000-$4,000, and it does not require the 12-foot-wide frame assumed in this article.
Assumptions: Two standard U.S. king mattresses, custom reinforced frame, standard residential delivery, and no major floor or doorway alterations.
How mattress, frame, foundation, and delivery charges add up
The frame and mattress pair usually account for most of the bill, while foundations and delivery can add hundreds more. The breakdown below uses typical U.S. retail and custom-fabrication ranges. Costs vary by market, construction method, and whether the frame is built in a shop or assembled on site.
| Quote component | Low | Average | High | What changes the charge |
|---|---|---|---|---|
| Two mattresses | $1,000 | $2,400 | $5,000 | Foam, hybrid, latex, and comfort tier |
| Frame materials and fabrication | $700 | $1,800 | $4,500 | Steel, hardwood, finish, and span supports |
| Foundations and center supports | $250 | $600 | $1,400 | Two bases, load rating, and support design |
| Delivery and assembly labor | $150 | $350 | $800 | Distance, stairs, crew size, and setup scope |
| Bedding and mattress bridge | $200 | $700 | $1,800 | Custom width, fabric, and gap-cover needs |
| Removal and disposal | $0 | $100 | $300 | Optional hauling of old furniture or mattresses |
Frame quotes should state the load rating, number and location of center legs, slat spacing, and whether assembly is included. A 152-inch-wide frame has a much longer unsupported span than a normal king frame, so a basic king platform should not be assumed suitable. If the two mattresses sit separately, the quote should also clarify whether the frame includes a divider or a method to limit shifting.
Delivery charges are often separate from the product price. Local drop-off may be included, while in-home placement and assembly can add $100-$400. Stairs, narrow turns, long carries, or delivery outside a service radius can push the charge above $500. For custom assembly, labor may be estimated at $60-$125 per worker per hour, with two workers commonly needed for a large frame.
Why 152-inch width, mattress type, and room access change the quote
Dimensions and structural support are the biggest technical cost drivers. Two king mattresses create a 152-inch-wide surface, but frame rails, headboards, and side clearances can bring the overall width close to 160 inches or more. A frame quote for a standard 76-inch king is not comparable unless it explicitly covers the doubled span and the combined load.
Mattress construction shifts the price sharply. Basic foam models may be $500-$900 each, midrange hybrids often fall around $900-$1,800 each, and premium latex or specialty models can reach $2,500 or more per mattress. Two mattresses should have compatible heights and firmness if a nearly level surface is important. Buying different models can create a noticeable seam or height difference.
Frame material and engineering matter at this scale. A reinforced steel design may start near $700-$1,500, while a custom hardwood frame with finished headboard can run $2,000-$4,500. Long spans may require a center beam and multiple legs; an added support assembly can cost $150-$500, depending on fabrication and finish. High-load requirements, such as a combined occupant and mattress load above 1,000 pounds, should be discussed before ordering.
Room size and access can add costs even when the furniture itself is unchanged. Measure the bedroom, hallways, stair landings, elevators, and door openings. A room narrower than about 14 feet may leave limited walking space beside a 12-foot-8-inch mattress surface. If the frame cannot pass through the route in pieces, onsite assembly or a redesigned frame may add $200-$1,000.
Region also affects quotes. Custom woodworking and delivery in high-cost metro areas can run 15%-30% above prices in lower-cost markets. Rural delivery may add a distance charge instead, often $50-$250. These are broad comparison ranges, not fixed regional tariffs; local availability of mattress brands and frame shops can outweigh the general location difference.
How to lower the double king bed price without weakening support
The most reliable savings come from controlling custom work and buying only the dimensions needed. Before ordering, establish whether the goal is a truly 152-inch-wide bed or simply independent mattress adjustment. A split king with two Twin XL mattresses costs much less in many cases and fits a standard king footprint. It does not provide twice the width, but can satisfy buyers who mainly want separate firmness or adjustable positions.
Keep the frame design simple. A platform with a basic upholstered or unfinished finish can avoid the cost of a wide headboard, storage drawers, decorative trim, and specialty hardware. Ask for separate prices for the platform, headboard, foundations, assembly, and delivery. That makes it possible to remove lower-priority features without changing the required support structure.
Compare two or three written quotes using the same drawing, dimensions, load requirements, materials, finish, and installation scope. A quote that omits center supports or delivery can appear cheaper while leaving essential items out. For mattresses, compare the delivered price of two identical models and check whether a pair discount changes the total. Discounts of 5%-15% may be available, but should be evaluated against the final price rather than the advertised markdown.
Use standard mattresses and customize only the frame and bedding. Nonstandard mattress sizes can be difficult to replace, and custom mattresses may cost 20%-50% more than comparable standard models. Two king-size fitted-sheet sets or a custom oversized top sheet may be more practical than commissioning a complete custom bedding package. Confirm return and exchange terms before ordering mattresses that will be placed together.
Three realistic quotes for foam, hybrid, and hardwood setups
These examples show how material choices produce different totals for the same two-king footprint. Prices assume normal access and include common delivery and setup charges, but exclude tax and removal of existing furniture. Actual quotes depend on brand, city, fabrication method, and finish.
| Example setup | Mattresses | Frame and foundation | Labor and delivery | Estimated total |
|---|---|---|---|---|
| Budget foam | 2 at $650 = $1,300 | $900 reinforced platform | 4 hours, $320; delivery $180 | $2,700-$3,100 |
| Midrange hybrid | 2 at $1,250 = $2,500 | $1,700 frame; $500 supports | 6 hours, $480; delivery $250 | $5,100-$5,700 |
| Premium latex and hardwood | 2 at $2,300 = $4,600 | $3,600 frame; $900 foundations | 8 hours, $800; delivery $450 | $9,800-$10,800 |
The budget example assumes a straightforward metal or basic wood platform and no custom headboard. The midrange option allows for a stronger finished frame and two more substantial mattresses. The premium example includes a finished hardwood frame and high-end latex beds; custom bedding or extensive room work would be additional.
Labor estimates use a two-person crew for roughly 2-4 hours on site, plus any shop fabrication already included in the frame price. If the fabricator charges separately for shop time, ask whether the quote is fixed-price or hourly. A project requiring extra measuring, delivery coordination, or assembly around stairs may need a third worker or a second visit.
Should buyers choose two king beds or a split king instead
A split king is cheaper when independent movement matters more than extra width. A standard split king uses two Twin XL mattresses, each 38 by 80 inches, for a combined surface of 76 by 80 inches. A complete mattress-and-adjustable-base package may cost $2,000-$7,000, depending on mattress quality and motor features. It fits a standard king frame and standard king bedding.
Two full king mattresses are a different purchase. They create a much wider bed, so the frame, foundations, mattress pair, and bedding all need to accommodate the 152-inch width. This option can make sense for a large custom room or a specialty sleeping arrangement, but it is not interchangeable with a split king. Confirm the exact mattress dimensions on the invoice, rather than relying on the phrase “double king.”
Another alternative is a standard king mattress with a separate twin-size daybed or guest mattress nearby. This can cost $1,000-$3,000 less than a full double-king build, depending on the selected mattresses and frame. It does not create one continuous sleeping surface, but it avoids a custom 12-foot-wide structure and can be easier to move or replace.
How delivery, assembly, and old-bed removal affect the final bill
Delivery and setup are often a modest share of the quote, but difficult access can make them a major expense. Basic curbside or threshold delivery may be free to $150, while in-room placement and assembly commonly cost $150-$400. A large frame delivered to a second floor or through a narrow staircase may incur a $75-$300 access surcharge, or require a frame designed for onsite assembly.
Old mattress removal is usually optional and may cost $50-$150 per mattress. A local hauling service can charge $100-$300 for a frame and mattress pair, with additional fees for extra items or long carries. Some municipalities require mattresses to be wrapped or scheduled for special collection. If buyers arrange disposal themselves, they should check local bulky-item rules before delivery day.
Ask whether the delivery team will assemble the frame, place both mattresses, remove packaging, and test the supports. A “delivery included” offer may cover only drop-off. Clarifying these tasks prevents a surprise charge and helps determine whether a separate handyman is needed. For an independently hired installer, expect approximately $60-$125 per hour, often with a two-hour minimum.
Which dimensions and quote details should be confirmed first
Written dimensions prevent the costly mistake of ordering a standard king setup for a double-width bed. Request a drawing that lists mattress dimensions, frame outside dimensions, headboard width, clearance needed around the bed, and the location of center supports. The combined mattress surface should be 152 by 80 inches if the order truly includes two U.S. king mattresses.
Confirm the frame’s material, finish, maximum supported load, slat spacing, and warranty. Ask whether the price includes foundations or whether the mattresses sit directly on slats. Verify that both mattresses are the same height, and determine whether a connector or gap filler is included. These details can influence both comfort and the need for added accessories.
Compare final delivered totals, not just advertised mattress prices. A complete quote should itemize the two mattresses, frame fabrication, foundations, delivery, assembly, taxes, and any disposal charge. Request written terms for cancellations, custom-order deposits, delivery delays, returns, and warranty coverage. Custom frames and made-to-order bedding may have stricter return rules than stocked products.
As a practical budget, allow about $2,500-$3,500 for a basic, carefully specified build, $4,500-$6,500 for a common midrange installation, and $8,000-$11,000 or more for premium mattresses and custom hardwood work. The final amount depends most on whether “double king” means a true 152-inch bed or a standard-width split king.