How much does a home office build-out cost?

A basic setup in an existing room (paint, electrical, furniture, shelving) costs $1,000-$3,800. A mid-range build-out with built-in desk, sound insulation, new flooring, and upgraded lighting costs $3,000-$9,800. A premium build-out with custom cabinetry, full soundproofing, dedicated HVAC, and network wiring costs $8,500-$23,000. The biggest cost variables are built-in furniture ($1,000-$8,000) and soundproofing ($500-$3,000). Using a spare bedroom is cheapest; converting a garage or attic adds significant construction costs. How do I soundproof a home office?

How do I soundproof a home office?

During construction: insulate wall cavities with R-13 fiberglass batts, add double drywall with Green Glue between layers, seal all gaps with acoustic caulk, and install a solid-core door with weather stripping and door sweep. This achieves STC 50+ (very loud sounds barely heard). After construction: add acoustic panels ($20-$50 each), heavy curtains, bookshelves with books, and rugs. A full soundproofing package costs $1,000-$3,000. The most impactful single upgrade is replacing a hollow-core door with a solid-core door. How many outlets does a home office need?

How many outlets does a home office need?

Plan for 4-6 outlets at desk level (computer, monitor(s), desk lamp, chargers, speakers, dock) plus 2 floor-level outlets (printer, shredder, floor lamp). Include at least one USB outlet at desk level. All should be on a dedicated 20-amp circuit separate from the rest of the room. Add a second circuit if you'll use a space heater or high-draw equipment. An uninterruptible power supply (UPS, $100-$300) protects computer equipment from power surges and brief outages. What is the best lighting for a home office?

What is the best lighting for a home office?

Use layered lighting: overhead recessed lights (4000-5000K cool white, 50-75 foot-candles at desk), an adjustable desk lamp on the opposite side of your writing hand (800-1,000 lumens), and optional ambient LED strips behind the monitor. Position your desk perpendicular to windows (not facing or back-to-window) to minimize screen glare. A monitor light bar ($40-$100) reduces eye strain without taking desk space. Overhead lighting should be on a dimmer for adjustability throughout the day.

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Home Office Build-Out Guide: Layout, Electrical, Sound & Cost

Lumberama Editorial Team, Home Office & Interior Design Specialists May 19, 2026 9 min read

Space Requirements

Minimum sizes: Small office (single desk): 7x7 feet (49 sq ft). Standard office: 10x10 feet (100 sq ft). Office with meeting area: 10x12 feet (120 sq ft). Two-person office: 12x12 feet (144 sq ft).

Desk space: Standard desk: 24x48 inches minimum. L-shaped desk: 60x60 inches. Standing desk: add 6 inches depth for mechanism. Clear 36 inches behind desk for chair movement.

Common locations: Spare bedroom (most common). Basement (good for sound isolation). Attic (quiet, private). Garage conversion. Closet conversion (small but dedicated). Backyard ADU/shed office (growing trend).

Electrical

Circuits: Dedicated 20-amp circuit (minimum) for computer equipment. Separate circuit for HVAC/space heater. UPS (uninterruptible power supply): $100-$300 (protects against power loss).

Outlets: 4-6 outlets at desk level (computers, monitors, chargers). 2 outlets at floor level (printer, shredder). USB outlets (built-in USB-A and USB-C). GFCI if near water source.

Data/network: 2 Ethernet drops at desk (one for computer, one for dock/phone). WiFi access point (if home WiFi doesn't reach well).

Lighting circuits: Overhead lighting on dimmer. Task lighting outlets at desk. Under-cabinet lighting (if built-in desk).

Lighting

Natural light: Position desk perpendicular to window (reduces screen glare). North-facing window: best (consistent, indirect light). East or west-facing: need window treatment (morning/afternoon glare). Light-filtering shades: diffuse without darkening.

Overhead: 50-75 foot-candles at desk level (OSHA recommendation for office work). Recessed can lights: 4-inch, spaced 4-5 feet apart. Avoid single overhead fixture directly above (causes shadows). Color temperature: 4000-5000K (cool white, reduces eye strain).

Task lighting: Desk lamp: adjustable arm, LED, 800-1,000 lumens. Position on opposite side of writing hand. Monitor light bar (BenQ ScreenBar): reduces eye strain, no desk footprint. Cost: $40-$100.

Ambient/accent: LED strip lighting under shelves or behind monitor. Creates depth and reduces contrast fatigue. Color temperature: 3000-4000K.

Sound Control

Sound insulation (during construction): Walls: R-13 or R-15 fiberglass batts in wall cavities. Double drywall: two layers of 5/8 inch drywall (add 6-8 STC points). Green Glue: between drywall layers (add 5-7 STC points). Acoustic caulk: seal all gaps and penetrations. Solid-core door: STC 30-35 (vs STC 15-20 for hollow core).

Sound treatment (after construction): Acoustic panels: $20-$50 each (absorption, reduces echo). Bookshelf with books: natural sound absorption. Heavy curtains: $50-$200 (absorb sound, block light). Rug or carpet: reduces foot noise and echo. Weather stripping on door: seals sound gaps. Door sweep: $10-$20 (seals bottom gap).

STC ratings: STC 25: normal speech easily understood. STC 35: loud speech audible but not understood. STC 42: loud speech barely audible. STC 50+: very loud sounds barely heard. Standard interior wall: STC 33. Insulated + double drywall + Green Glue: STC 50+.

Cost: Basic insulation in walls: $200-$500. Double drywall with Green Glue: $500-$1,500. Solid core door: $200-$500. Acoustic panels (6-pack): $80-$200. Full soundproofing package: $1,000-$3,000.

Cost

Basic setup (existing room): Paint: $100-$300. Electrical (add outlets): $200-$600. Desk and chair: $500-$2,000. Shelving: $100-$500. Lighting: $100-$400. Total: $1,000-$3,800.

Mid-range build-out: Electrical upgrades: $500-$1,500. Built-in desk/shelving: $1,000-$4,000. Sound insulation: $500-$1,500. Flooring (LVP or carpet): $500-$1,500. Lighting (recessed + task): $300-$800. Paint and trim: $200-$500. Total: $3,000-$9,800.

Premium build-out: Custom built-in desk and cabinetry: $3,000-$8,000. Full soundproofing: $1,000-$3,000. Electrical + network wiring: $1,000-$2,500. Premium lighting: $500-$1,500. HVAC (mini split or ductwork): $2,000-$5,000. Flooring: $500-$1,500. Paint, trim, millwork: $500-$1,500. Total: $8,500-$23,000.

ROI: Dedicated home office: 50-75% ROI at resale. Remote work permanence makes home offices high-demand feature. Soundproofed office is a premium selling point.