The cost to convert a single door into a double opening varies widely based on opening size, door type, and installation complexity. Typical drivers include frame enlargement, structural considerations, and hardware updates. This guide provides cost ranges, per-unit pricing, and practical budgeting tips for U.S. buyers.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Total Project | $1,200 | $2,100 | $3,500 | Includes doors, hardware, labor, and minor framing. Excludes major structural work. |
| Per-Door (extra unit) | $700 | $1,150 | $1,750 | Cost varies by door style and frame depth. |
| Door Materials | $250 | $550 | $1,000 | Fiberglass and Mid-range wood are common choices. |
| Labor | $500 | $1,000 | $1,800 | Includes framing, routing, and hardware installation. |
| Frame & Opening Work | $200 | $600 | $1,200 | Includes widening, shimming, and weatherproofing. |
| Hardware & Finishes | $50 | $150 | $350 | Handles, hinges, and trim total. |
Assumptions: region, door style, existing structural conditions, and labor availability vary by project.
Overview Of Costs
The cost to convert a single door into a double opening typically ranges from $1,200 to $3,500 for most residential projects. The wide spread reflects differences in opening size, structural work, and material choices. For planning, expect a base installation under $2,000 in straightforward cases and closer to $3,000+ when widening frames or reinforcing studs is required.
Typical per-unit pricing shows a single added opening at roughly $700-$1,750, depending on door type and frame finish. This helps separate material investments from labor-driven costs and clarifies budget tradeoffs for dual-door configurations.
Cost Breakdown
Below is a concise table of the main cost components and common ranges. The totals assume standard exterior or interior hollow-core or solid-core doors and do not include major structural changes.
| Components | Low | Average | High | Notes |
|---|---|---|---|---|
| Materials | $250 | $550 | $1,000 | Door slabs, casing, and threshold. |
| Labor | $500 | $1,000 | $1,800 | Carpentry, framing, and finish work. |
| Frame/Opening Work | $200 | $600 | $1,200 | Enlargement and structural accommodations. |
| Hardware & Finish | $50 | $150 | $350 | Locks, hinges, knobs, and trim. |
| Permits & Inspections | $0 | $100 | $400 | Depends on locality and whether structural changes trigger permits. |
| Disposal | $0 | $50 | $150 | Removal of old door and debris. |
What Drives Price
Key price drivers include opening width and structural impact, door material and finish, and labor complexity. Widening a doorway from 30 inches to 60 inches typically increases framing and hardware requirements, while premium doors (composite or solid wood) add material costs. Higher labor rates occur in metro areas or when special tools and scaffolding are needed.
Factors That Affect Price
- Opening dimensions: wider openings require more framing and potentially header work.
- Door type: hollow-core interior doors vs. solid exterior doors change material costs.
- Structural reinforcement: added studs, headers, or beam support can raise both cost and project duration.
- Insulation and weatherproofing: enhanced seals, weatherstripping, and flashing add to price but improve performance.
- Finishes: premium casing, trim, and paint finish affect final cost.
Ways To Save
Plan to reuse components when feasible and select standard sizes or prehung units to reduce fitting time. Obtaining multiple quotes, coordinating demolition with other remodel work, and choosing mid-range materials can yield meaningful savings without sacrificing durability.
Regional Price Differences
Prices vary by region due to labor rates, permitting costs, and material availability. In the Northeast, expect higher labor and permit costs; the Midwest often provides more affordable labor; the West shows wide variation depending on city density and supplier access. Typical regional deltas can be ±15-25% from national averages.
Labor & Installation Time
Labor hours commonly range from 8 to 20 hours for standard conversions. A straightforward interior alteration may land near the lower end, while exterior doors or large enlargements raise time and labor intensity. A simple estimate: 8-12 hours for minor frame work, 12-20 hours for major widening and weatherproofing.
Additional & Hidden Costs
Hidden costs often involve permits, structural reinforcement, and disposal fees. Some projects need steel headers or reinforcement plates, which add $200-$800 extra. Unexpected framing adjustments or water management upgrades can add to the bottom line.
Real-World Pricing Examples
Three scenario cards illustrate common outcomes with varying specs.
Basic
Specs: interior hollow-core doors, minor widening (from 36″ to 48″), standard hardware, no structural reinforcement.
Labor: ~9 hours; Materials: $300; Total: $1,350; Per-unit: $675.
Mid-Range
Specs: exterior solid-wood doors, widening to 60″, modest header reinforcement, mid-grade trim, weatherproofing.
Labor: ~14 hours; Materials: $650; Total: $2,350; Per-unit: $1,175.
Premium
Specs: custom prehung doors, full structural upgrade, premium trim and seals, updated hardware set.
Labor: ~20 hours; Materials: $1,000; Total: $3,500; Per-unit: $1,750.
Assumptions: region, specs, labor hours.
