Attic trusses typically cost $200-$700 each, compared with about $100-$400 for regular roof trusses, before delivery and installation. The final price depends on span, lumber and engineering requirements, the number of trusses, local labor rates, and whether the attic space must meet residential building codes.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Regular roof truss | $100 each | $250 each | $400 each | Common residential spans and standard designs |
| Attic truss | $200 each | $450 each | $700 each | Allows a central open area for usable attic space |
| Truss package for 1,200-sq-ft roof footprint | $2,100 | $7,350 | $14,700 | About 21 trusses at 24-inch spacing; trusses only |
| Delivery and setting | $500 | $1,500 | $4,000 | Varies with distance, crane needs, access, and crew |
What attic trusses cost for a typical roof
For a straightforward house, regular trusses often run $100-$400 per unit, while attic trusses commonly fall between $200 and $700. A typical average is about $250 for a regular truss and $450 for an attic truss. Those figures generally assume a standard engineered wood design, ordinary access, and a moderate residential span; unusually large or complex designs can exceed the high range.
A 1,200-square-foot building footprint with trusses spaced 24 inches apart needs roughly 21 trusses along a 40-foot building length. At average unit prices, the trusses alone cost about $5,250 for regular trusses or $9,450 for attic trusses. Roof shape, gable-end framing, and engineering details may change the count and quote.
For the same footprint and spacing, attic trusses can add roughly $4,200 in average truss-material cost before delivery, setting, and interior finishing. The comparison is not a complete finished-room price: flooring, stairs, insulation, wiring, and code-compliant egress are separate expenses.
Assumptions: 1,200-sq-ft footprint, about 21 trusses at 24-inch spacing, standard engineered lumber, and no unusual roof geometry.
How lumber, engineering, delivery, and setting shape the quote
A truss quote can combine fabrication, engineering, freight, installation, and overhead. Some suppliers quote trusses only; others include delivery or setting. Comparing proposals requires checking what each line covers, particularly whether the price includes a crane, temporary bracing, and jobsite unloading.
| Quote component | Regular truss range | Attic truss range | What changes the price |
|---|---|---|---|
| Fabricated trusses | $100-$400 each | $200-$700 each | Span, design, lumber grade, web layout, and order size |
| Engineering and shop drawings | $0-$1,000 per project | $300-$2,000 per project | Custom spans, local review, and design revisions |
| Delivery | $200-$1,000 per load | $300-$1,500 per load | Distance, oversize load needs, and site access |
| Setting labor and equipment | $5-$12 per sq ft of roof footprint | $7-$16 per sq ft of roof footprint | Crew size, crane time, height, and bracing |
| Overhead and contingency | $300-$1,500 per job | $500-$2,500 per job | Contractor scope, schedule risk, and site conditions |
Labor is often priced by the project rather than by each truss. A framing crew may charge about $50-$100 per worker-hour, but a contractor’s installed rate also covers supervision, insurance, equipment, and overhead. A 4-person crew working 8 hours at a loaded rate of $75 per worker-hour represents about $2,400 in labor before equipment and other charges.
Request separate prices for fabrication, delivery, crane or setting labor, and any engineering so the two truss types can be compared on equal scope.
Why span, spacing, and room width change attic truss prices
Span is a major price driver because longer trusses need stronger members and more demanding engineering. A common 24-foot span may fit standard residential production, while spans above 30 feet can require larger lumber, added webs, special handling, or engineering review. At 40 feet or more, prices can rise sharply and vary substantially by design.
Spacing also changes the number of units. At 24-inch spacing, a 40-foot building length needs about 21 trusses; at 16-inch spacing, it needs about 31. More pieces increase the material and setting total, although closer spacing may allow a different design or reduce other structural requirements. The truss designer determines the appropriate spacing from plans, loads, and code.
Attic trusses have an open center area intended for a room, with diagonal webs arranged around it. A wider room opening, taller ceiling, or larger clear floor area leaves less space for structural webs and can require deeper or stronger members. A narrow 8-foot-wide room is generally less demanding than a 12-foot-wide room within the same roof, but no universal per-foot surcharge applies.
Roof pitch, snow load, wind exposure, and dead load matter as well. A 6:12 pitch, for example, has a different geometry and roof-space potential from a 4:12 pitch. Heavy roofing, solar panels, or local snow loads can call for stronger components. Compare quotes using the same span, spacing, room dimensions, pitch, and design loads.
How installation time and crane access affect the final price
A small, accessible roof may take a framing crew one day to set trusses, while a larger home or difficult roof can take two to four days. Attic trusses are heavier and more complex to handle than many standard trusses. They often need careful alignment and bracing, and an installer may use a crane or telehandler to place them safely.
Crane charges commonly add $500-$2,000 for a residential setting, with higher fees possible for a long rental, difficult lift, or remote site. Narrow driveways, overhead wires, mature trees, steep terrain, or a building far from the delivery truck may require extra labor or equipment. A supplier can also charge a redelivery or waiting fee if the site is not ready when the truck arrives.
Regular trusses for an accessible, simple roof may cost around $5-$12 per square foot of roof footprint to set, while attic-truss installation may run $7-$16 per square foot. These are labor-and-setting estimates, not installed roof-system prices; sheathing, roofing, insulation, drywall, and finishes are not included. Confirm whether the contractor’s setting price includes the crane, bracing, and cleanup.
What three attic-truss quotes can look like
These examples show how scope affects a quote. They assume ordinary residential access and standard engineered lumber; local prices, wind and snow design, and contractor scope can change the totals. Each total covers trusses, delivery, and setting, but not roofing or finished attic construction.
| Example | Specifications | Estimated quote |
|---|---|---|
| Compact garage | 24-by-30-ft footprint, 16 trusses at 24-in spacing, 24-ft span | $5,000-$9,000 |
| Typical home addition | 30-by-40-ft footprint, 21 trusses at 24-in spacing, 30-ft span | $9,000-$16,000 |
| Wide custom roof | 40-by-50-ft footprint, 26 trusses at 24-in spacing, 40-ft span | $18,000-$32,000 |
The compact-garage estimate assumes approximately $3,200-$7,200 for attic trusses and $1,800-$3,000 for delivery and setting. The typical addition assumes about $6,300-$12,600 for trusses and $2,700-$3,400 for delivery and placement. A wide custom roof may need heavier designs and longer crane time, which is why its total rises more than a simple count of trusses suggests.
For comparison, regular trusses on the same 30-by-40-foot footprint might total roughly $6,000-$11,000 including delivery and setting, versus $9,000-$16,000 for attic trusses. These are framing-package budgets, not finished attic-room estimates.
How regional freight and labor shift truss prices
Manufacturing access and freight distance can matter as much as the local price of lumber. In areas near multiple truss plants, a standard order may be 5%-10% below a similar order in a remote market. Rural locations with long delivery routes, limited crane availability, or fewer framing crews may instead add 10%-20% to the installed total.
High-cost metro markets in the Northeast, West Coast, and parts of Hawaii can run about 10%-25% above a national midrange for labor, permitting, and equipment. The South and Midwest often land near the middle, but coastal wind loads and northern snow loads can increase engineering and lumber requirements. These percentages are planning ranges, not guaranteed regional price rules.
Ask whether the quote includes freight mileage, a fuel or oversize-load surcharge, and any minimum delivery charge. Comparing a supplier quote with a local contractor quote can otherwise be misleading if one includes the crane and the other does not. Local labor, haul distance, and structural loads should be priced for the actual address.
When attic trusses cost less than separate floor framing
Attic trusses cost more per unit than regular trusses, but they can be a cost-effective way to create attic-room structure during new construction. Their design combines roof support and a room-sized open area in one assembly. In some projects, that can avoid separate floor joists and additional framing, particularly when the house plans already allow for an attic room.
They are not automatically cheaper than regular trusses plus a later conversion. A usable room still needs a code-compliant stair, floor, insulation, ventilation, electrical work, fire protection, and often a window large enough for emergency escape. A stair opening can also require added structural work. Finished attic costs can run from several thousand dollars to well over $50,000 depending on room size, plumbing, finishes, and changes to the existing structure.
Retrofitting attic trusses into an existing house is generally not a simple replacement. The roof may need to be opened, supports may need redesign, and the walls and foundation must carry the added loads. A structural engineer should assess the building before a contractor prices a conversion. For new construction, compare the complete framing plan; for an existing roof, compare the full conversion scope rather than truss prices alone.
Which permit and code costs belong in an attic-room budget
Building departments may treat an attic room differently from an unoccupied storage attic. Permits, plan review, inspections, and code upgrades can add roughly $500-$3,000 or more, depending on location and project scope. Some jurisdictions require stamped structural plans, while others require review of stair dimensions, ceiling height, energy performance, smoke alarms, and emergency egress.
Those requirements can influence the truss design before fabrication. A room intended for regular occupancy may need specific floor loading and a minimum clear area, while a storage-only attic may not. Local rules determine the exact requirements, so the permit office or design professional should confirm them before ordering custom trusses. Changes after fabrication can be expensive or make the trusses unusable.
Permit fees and inspections are not always included in a framing contractor’s quote. Ask whether plan drafting, engineering stamps, and resubmittal fees are included, and check if the estimate assumes an unfinished storage space or a habitable room. Confirm the intended use and local code requirements before approving the truss drawings.
How to lower the attic-truss price without weakening the design
Keep the roof geometry and attic-room dimensions close to standard plans where practical. Unusual dormers, multiple roof pitches, extra-wide clear spans, and late plan changes can trigger custom engineering and fabrication. Fixing the room width and stair location before ordering reduces the risk of costly redesigns.
Get comparable quotes from at least two truss suppliers or framing contractors. Provide identical plans and ask for the same span, spacing, lumber specification, load assumptions, delivery point, crane service, and bracing scope. A low unit price may not be the lowest installed price if freight, engineering, or setting is excluded.
Schedule delivery when the foundation, walls, and access are ready, and coordinate the truss order with the framing crew. This can help avoid storage, redelivery, and crane-waiting charges. Avoid choosing a cheaper truss that is not engineered for local loads or intended room use; structural changes after delivery can erase any initial savings.
The most reliable savings usually come from a simpler design, complete bids, and avoiding unnecessary revisions—not from reducing required structural capacity.