Homeowners and remodelers ask this question every day. While national averages are useful, the number that matters most is the one tied to your zip code, your house, and the door style you select. CountBricks removes the guesswork by combining real-time material pricing, local labor rates, and AI-driven takeoffs to generate a precise figure—often in less than five minutes.
Across the U.S., the cost to install an interior door generally falls between $375 and $1,050 per unit. Houston projects often land near the middle of that range, but even two homes on the same block can vary. Why? Because five key factors play a role:
• Door type (hollow core, solid core, glass panel, pocket, barn)
• Door size and jamb depth
• Trim style and finish level
• Existing opening condition versus new framing
• Hardware quality and specialty features such as soft-close tracks
1. Materials
Most homeowners think “door slab,” but materials also include hinges, knobs, strike plates, shims, fasteners, and paint. A hollow-core slab might cost $90, while a custom solid-wood barn door can exceed $700. CountBricks pulls live pricing from leading suppliers, ensuring your estimate reflects today’s costs—not last quarter’s catalogue.
2. Labor
Installing an interior door is about precision. Carpenters must plumb, level, and square the jamb, then adjust reveals so the door swings smoothly. Labor in residential construction typically ranges from $180 to $420 per door. Using CountBricks voice capture, field crews dictate tasks and durations, allowing our AI to calculate labor in real time based on your region’s wage data.
3. Overhead & Contingency
Contractors often add 10-15% to cover insurance, mobilization, and unforeseen site conditions. CountBricks automatically builds these percentages into the estimate so you see the full picture upfront.
Online calculators rely on broad averages, ignoring critical details like:
• Wall thickness that requires extended jambs
• Out-of-square openings in older homes
• Permits for fire-rated assemblies in multifamily residences
• Trim matching historical profiles
CountBricks addresses these nuances by letting users snap a photo or upload a blueprint. Our AI recognizes wall types, measures openings, and highlights hidden challenges before the first cut is made.
1. Speak your scope into the CountBricks mobile app—“Install three 30-inch solid core interior doors, paint included.”
2. AI converts the conversation into a task list, pulling template assemblies from CountBricks.com/services.
3. Live-priced materials are matched with local labor rates.
4. The system outputs a detailed line-item estimate and a polished client-ready quote, ready to download or send.
A Houston homeowner wanted to replace six dated hollow-core doors with shaker-style solid core units. Using CountBricks:
• Takeoff completed in 3 minutes via blueprint upload
• Material cost: $1,860 (verified through live supplier feeds)
• Labor: $1,380 including removal, install, and paint
• Overhead & profit: $408
Total bid: $3,648, accepted within 24 hours. The crew completed the installation in two days, and post-project reconciliation showed material variance under 1.2%—far tighter than the 8-10% typical in manual estimating.
• Choose door styles that match existing jamb sizes to avoid reframing.
• Opt for pre-hung units when possible; slab-only doors save money upfront but can add labor cost.
• Standardize hardware finishes to buy in bulk.
• Use CountBricks to spot market price spikes and lock material orders early.
Does material quality or labor have the bigger impact? For basic hollow-core units, labor may exceed material. For high-end doors, material dominates.
Can I reuse existing trim? Yes, but only if it pulls cleanly and matches the new jamb thickness. CountBricks flags trim reuse scenarios in your estimate.
What about painting? Add $55–$85 per door for spray finish. CountBricks auto-adds this line item when you specify paint.
If you’re still wondering “how much does it cost to install an interior door” in your own project, the fastest route to accuracy is a CountBricks AI estimate. Try a free demo at CountBricks.com/consultation and see live costs in minutes, not days.
Accurate pricing is only part of the story. Residential contractors return to CountBricks because the platform eliminates the bottlenecks that typically slow small, high-volume tasks like interior doors.
• Voice-to-Estimate Workflow: Field supervisors dictate notes as they walk the house. By the time they reach their truck, the estimate is waiting in the cloud.
• Blueprint Auto-Recognition: Upload a PDF plan and CountBricks instantly highlights every door symbol, labels sizes, and counts quantities—reducing takeoff hours to seconds.
• Change Order Agility: Need to swap a hollow core for frosted glass? Edit a single line item, and the entire quote refreshes with new pricing and margin.
CountBricks ties each door assembly to a task checklist. Crews capture photos of plumb lines, hinge alignment, and final finish, then attach them to the job card. Homeowners receive a professional close-out packet, boosting confidence and referral rates.
• Automatic push to popular accounting platforms for seamless invoicing
• Export schedules to your calendar app so delivery dates and crew assignments align
• Sync material lists directly with supplier portals to reserve stock before prices rise
• Batch similar doors to minimize setup time and negotiate better supplier discounts.
• Use CountBricks margin tracking to spot profit slippage early—before it eats the job.
• Offer upgrade options (soft-close tracks, designer hardware) in the quote. Clients often accept when the upsell cost is transparent.
Combining streamlined estimating with operational controls, CountBricks helps residential contractors turn interior door installations into a predictable, profitable revenue stream. Explore the full workflow at CountBricks.com/services and schedule a live demo to see the system in action.
