Replacing or upgrading door hardware seems simple, yet every residential contractor knows the task can eat up valuable schedule time and margin. Homeowners search daily for “labor cost to install interior door knobs,” and as a construction professional you need a clear, defensible answer. CountBricks brings data-driven clarity by pairing real-time material pricing with voice-activated estimate generation, letting you quote confidently and win profitable work.
• High-volume task: Most single-family builds average 15–25 interior doors.
• Perceived simplicity: Clients expect quick turnaround and low cost—accurate labor breakdowns protect your profit.
• Upsell potential: Hardware upgrades often lead to hinge, stop, and smart-lock add-ons.
Based on thousands of CountBricks takeoffs and site conversations, professional installers in the United States commonly charge between $25 and $65 per knob. Several variables push that number to either side of the range:
• Site location and prevailing wage requirements
• Door condition (pre-bored vs. solid core retrofits)
• Lock complexity (passage, privacy, or electronic smart latch)
• Quantity installed in a single mobilization
• Accessibility and travel time
1. Mobilization & setup – 5–10 minutes per unit
2. Existing hardware removal – 3–5 minutes
3. Bore adjustment or mortising – 2–8 minutes (if required)
4. Knob installation & alignment – 5–7 minutes
5. Strike plate fit & test – 2–4 minutes
6. Cleanup & client walkthrough – 3–5 minutes
Multiply those minutes by your crew’s loaded labor rate and you have a transparent, line-item cost defensible to any homeowner or GC. CountBricks automates that math in seconds.
Homeowners frequently Google one blended price, yet professionals should separate material allowance from install cost.
• Passage knob sets: $9–$35 each retail
• Privacy/bath sets: $15–$50 each retail
• Keyed entry or smart locks: $30–$250+ each retail
CountBricks pulls live supplier feeds so your proposals always reflect today’s shelf price, not last quarter’s catalog.
Imagine walking a punch-out list with your smartphone. You say, “Replace ten privacy knobs, satin nickel, second-floor bedrooms.” CountBricks’ voice AI captures the scope, matches it to our curated task library, and produces a branded PDF in under two minutes.
• AI voice capture eliminates manual data entry
• Real-time labor cost library calibrated to your ZIP code
• Automatic bundling of related tasks—hinges, stops, strike adjustments
• One-click change orders when homeowners add smart locks mid-project
• Export to invoice with margin protection baked in
• Set a minimum service fee—CountBricks recommends $125 per trip to cover small-scope mobilizations.
• Bundle multiple knobs at a tiered rate; for example, first knob at $65, each additional at $35.
• Flag older solid-wood doors in the app; CountBricks automatically adds extra labor time for hand-chiseling latches.
Residential contractors in Nashville might average $42 per knob, while peers in Denver sit closer to $50 due to wage escalation. CountBricks continually tracks Department of Labor indices and adjusts your default rates so your bids stay competitive and profitable.
• Miscounted doors: Blueprint AI takeoff counts doors and knobs automatically.
• Forgotten trip charges: Default templates insert your travel fee every time.
• Underestimating specialty hardware: Our catalog flags smart or biometric locks and updates labor minutes instantly.
A CountBricks contractor replaced 38 interior knobs during a full cosmetic upgrade. Original manual estimate projected 12 labor hours. After importing the plan set into CountBricks, the AI added 18 minutes of latch plate mortising per solid-core door, revising the total labor to 14.3 hours and preventing a $240 loss. The client approved in minutes thanks to the transparent line items.
• Keep a dedicated installation jig in your tool bag to speed accuracy.
• Sort hardware by room before starting—CountBricks pick lists print labels automatically.
• Use painter’s tape to protect finished doors during drilling.
• Test latch engagement before installing screws fully.
• Photograph each finished knob; CountBricks attaches images to the project record for easy punch-list verification.
Stop guessing what to charge for door hardware installs. Create a free CountBricks account, upload your plan set, or start a voice conversation and receive a ready-to-send proposal in minutes. Visit CountBricks.com/services to learn more or schedule a live demo.
Door knobs rarely live in isolation. When you quote a full interior trim scope—baseboard, casing, and hardware—micro-errors compound. CountBricks compiles each micro-task into a single, cohesive workflow so you never underbill.
1. Baseboard installation
2. Door casing install
3. Final paint touch-ups
4. Interior door knob installation
By sequencing tasks in the software, CountBricks auto-generates an optimized schedule and manpower curve, highlighting when a smaller two-person crew can handle knobs while finish carpenters tackle other items.
• Average knobs per hour: 7.4 with an apprentice/helper team
• Rework rate using CountBricks checklist: below 2%
• Typical material waste: under 1% thanks to live inventory sync
The builder uploaded blueprints to CountBricks, triggering an AI takeoff that identified 21 passage knobs, 6 privacy knobs, and 3 smart locks. Labor was pegged at 5.2 crew hours. Because CountBricks recognized smart locks, it added 0.6 extra hours and a low-voltage allowance. The builder closed the deal at a 38% gross margin—4 points higher than prior projects.
• Log in to CountBricks.com/consultation and request your residential task library.
• Use the voice assistant on site to capture every hardware change order instantly.
• Compare our regional labor benchmarks to your crew’s historical data, then adjust rates with one tap.
Whether you’re retrofitting a single condo or outfitting a 40-door custom home, CountBricks turns door knob installation from an estimation headache into a streamlined, profitable line item.
