model

Built-In Bookcase Cost (2026): Per Foot, Painted to Walnut, With Labor Hours and Window Seats

A pair of built-ins flanking a fireplace priced painted, stained and by wood, with crown, glass doors and lights, plus window seats, shelf spans and fireplace clearances.

By Clamp ResearchReviewed by Emmanuel ForgePublished Oct 31, 2026✓ Reviewed Oct 2026

Direct answer: A pair of painted built-ins flanking a fireplace, each 4 ft wide and 8 ft tall with base cabinets and open shelves above, prices at $4,758 direct in Clamp's catalog, about $595 a linear foot, and 50 hr of labor. In stained white oak it's $6,603; open shelves with no cabinets, $2,532. A 5 ft window seat with a lift-up lid is $2,483, or $2,766 with drawers.

The assumptions

This model assumes

Two units flanking a fireplace, each 48 in wide and 96 in tall, 8 lf in all
36 in base cabinets 16 in deep with doors, 12 in shelves above, a center divider
Built and fitted on site; direct cost from Clamp's October 2026 catalog, before markup
No electrical unless lights are listed

The model, step by step

1The pair, measured

Two units flanking a fireplace, each 48 in wide and 96 in tall under a 9 ft ceiling: a 36 in base cabinet 16 in deep with two doors, open shelves 12 in deep above, and crown to the ceiling, priced as an add-on in step 6. Built-ins are priced by the linear foot of wall they cover.

2 units x 4 ft = 8 lf

Base: 36 in, 2 doors each

Shelves: 4 per bay, 12 in

Bays: 2 of 23 in a unit

8 lf, 4 doors, 16 shelves

Illustration of a fireplace wall with a 48 in built-in on each side: base cabinets with two doors, four shelves above split by a center divider in amber, and crown to the ceiling; the list reads Units 2 at 48 by 96 in, Base 36 in tall 2 doors, Shelves 4 per bay, Center divider 2 bays of 23 in, Crown to the 9 ft ceiling

The fireplace wall

Illustration of a built-in in section against the wall: a 16 in deep base with a toe kick and a top, and a 12 in deep shelf case above with four shelves; the list reads Shelf depth 12 in, Base depth 16 in, Base height 36 in with top, Shelf spacing 12 in

One unit in section

The pair in elevation and one unit in section, drawn in the style of Quick Clamp's sketch pad: the center divider and the depths in amber. Demo data.

Depths and heights here are common practice, not a code: 10 to 12 in shelves hold most books, and a deeper base gives a ledge. Scribe the end panels to the wall and the crown to the ceiling; no wall or ceiling is flat.

2The pair, painted, line by line

Painted built-ins are paint-grade plywood or MDF boxes built and fitted on site, then primed and enameled. Labor is most of the price.

Painted pair, 8 lf, direct cost
Line	Cost	Hours
Build, fit and install$285 a foot: boxes, face frames, doors hung, scribed	$2,280	36 hr
Boxes, doors, sheet goods8.8 lf with waste	$1,210
Prime and paintFaces, sides, every shelf, the back	$1,075	12 hr
Knobs and fasteners	$193	1.5 hr
Total$595 a linear foot	$4,758	50 hr

Direct cost before markup, from Clamp's October 2026 catalog. At a 1.50 markup the pair sells for about $7,137, $892 a foot. Open shelves with no base cabinets or doors: $2,532.

3Painted or stained, and the wood

Stained built-ins use veneer plywood with solid wood edging, matched for grain, and take a stain and clear coat instead of primer and paint. The wood changes the material line more than the labor.

The same pair, 8 lf, direct cost
Finish	Cost	/ft	Hours
Painted	$4,758	$595	50 hr
Stained poplar	$5,998	$750	59 hr
White oak	$6,603	$825	59 hr
Walnut	$6,966	$871	59 hr

Shops rarely publish a species upcharge; Clamp's material line scales by wood, and stained work takes 15 percent more build labor and 25 percent more finishing.

4Shelves that don't sag

A loaded bookshelf sags, then keeps sagging. A 48 in unit needs a center divider: two 23 in bays hold books on 3/4 in plywood or dense MDF. A single 46 in shelf won't.

What the references say

TargetThe Sagulator aims at 0.02 in of sag per foot; creep adds about 50 percent over time (WoodBin)

Book loadWoodwork standards design book shelves for 50 lb per sq ft, 200 lb a shelf at most (AWS, 2009)

MDF and particleboard3/4 in spans about 19 to 25 in under 40 lb per sq ft, by density; each span 26 to 34 in when one shelf runs over a center support (CPA, at L/240)

Plywood3/4 in plywood 7 1/2 in deep spans about 26 in under 35 lb a foot at L/400; a 1 x 3/4 in front apron adds 50 to 75 percent (JLC)

WoodBin's own load tests sagged 1.5 to 3.5 times what its calculator predicts, so build on the safe side. Past about 30 in, use a divider, a 1 in shelf or a deep hardwood edge.

5Next to a fireplace

Built-ins beside a masonry fireplace have to stay clear of the opening. Code allows no combustible trim within 6 in of it, and within 12 in, trim may stick out only 1/8 in for each inch away.

At 6 in: 6 x 1/8 = 3/4 in

At 8 in: 1 in

At 12 in: 1 1/2 in

Past 12 in: any depth

From the residential code's mantel and trim rule (IRC R1001.11, as JLC reads it). A factory-built or gas fireplace follows its own listing and manual; check its clearances before you draw the cabinets.

6Crown, glass doors and lights

Each add-on is its own line, so the homeowner sees what it costs.

Added to the painted pair, direct cost
Add	Cost	Hours
Crown to the ceiling10 lf of crown	+$108	+2 hr
4 glass doorsFrame doors, glass, hinges	+$930	+9 hr
Shelf lights, 32 ftLED tape, driver, dimmer	+$1,718	+12 hr
All three	$7,514	73 hr

Low-voltage LED tape has to run from a listed Class 2 driver (Diode LED's instructions; lighting systems like it are evaluated to UL 2108). Cost pages quote lights at $20 to $30 each, which leaves out the electrician and the switch.

7Window seats

A window seat is a short built-in: a box 14 to 18 in high and 16 to 24 in deep with a seat on top. Storage goes under a lift-up lid or in drawers.

A 5 ft painted window seat, direct cost
Seat	Cost	Hours
No storage	$1,816	19 hr
Lift-up lidTwo lid stays	$2,483	26 hr
Two drawersFull-extension slides	$2,766	30 hr

Window seat

A 5 ft window seat with two drawers, drawn in the style of Quick Clamp's sketch pad: the drawers in amber. Demo data.

CPSC advises lid supports that hold a storage lid open in any position, so it can't drop on a child. Drawers avoid the issue and are easier to reach. Cushions are the homeowner's or an allowance. Seat dimensions per Fine Homebuilding.

8What shops charge, and the hours

Few shops publish prices. The ones that do run from about $475 to $1,100 a foot; the top of that range is New York City.

Published prices, per linear foot
Shop	Price
Cabinets by AlanBase cabinets, and again for bookshelf units above; $220 a cabinet to install; finish not listed	$495
Cypress Designs, MinnesotaA $4,315 paint-grade pair: 30 in lowers and four floating shelves, about 9.1 lf; install not stated	$474
Hudson Cabinetry, New YorkBase rate, units up to 8 ft tall	$850 to $1,100
Clamp, painted pair, sold at 1.50	$892

Clamp's painted pair is 50 hr: about 4.7 hours a foot to build and install, plus 1.6 to finish. One Atlanta shop owner's 12 1/2 ft paint-grade built-in took about 4 hours of design, 3 shop days and 2 install days, roughly 3 hours a foot, unprimed (WOODWEB, 2007).

HomeAdvisor's $150 to $1,200 a foot and HomeGuide's $300 to $850 mix shop-built, site-built and stock cabinets dressed up with trim. Price your own build method and track the hours by foot.

What it means

What to doPrice built-ins by the foot of wall at full or waist height, then put the finish and wood, crown, glass doors and lights on their own lines. Split anything over about 30 in with a divider, keep the cases more than 12 in from a fireplace opening, and give a window seat lid stays or drawers.

The pair is the same 8 lf in every row. Open shelves to walnut is $2,532 to $6,966.

Every option on its own line

Clamp's estimate prices built-ins by the linear foot at full or waist height, painted or stained in the wood you pick, and adds crown, glass doors and shelf lighting as separate lines; window seats come with a lid or drawers. Sketch the wall in Quick Clamp to keep its measurements.

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Put your own rates and hours per foot in your catalog. The next built-in quote takes ten minutes.

Questions

How much do built-in bookcases cost per linear foot?

About $595 a linear foot direct in Clamp's catalog for full-height painted built-ins with base cabinets, or about $892 sold at a 1.50 markup. Shops publish $474 a foot for a Minnesota pair of paint-grade lower cabinets with floating shelves; $495 a foot for base cabinets plus $495 for bookshelf units above at one cabinetmaker, before $220 a cabinet to install; and $850 to $1,100 in New York City.

How much do built-ins around a fireplace cost?

A pair of 4 ft painted units, 8 ft tall, is about $4,758 direct in Clamp's catalog; stained white oak about $6,603. One Minnesota shop lists a paint-grade pair of lower cabinets with floating shelves at $4,315.

How far do built-ins have to be from a fireplace?

For a masonry fireplace, the residential code allows no combustible trim within 6 in of the opening; within 12 in, trim may stick out only 1/8 in for each inch away. Start wood cases more than 12 in from the opening. A factory-built or gas unit follows its own listing.

How long can a bookshelf span without sagging?

About 24 to 30 in for 3/4 in plywood under books, less for MDF or particleboard. A center divider, a 1 in shelf or a hardwood front edge stretches that; a 48 in unit should be split into two bays.

How much does a window seat cost?

A 5 ft painted window seat is about $1,816 direct in Clamp's catalog without storage, $2,483 with a lift-up lid and $2,766 with two drawers, before markup.

Sources & provenance

Clamp estimating catalog (2026-10): built-in cabinetry, finish and species, crown, glass doors, shelf lighting and window seats Clamp Research
The Sagulator WoodBin (research)
Shelf Sag Measurements WoodBin (research)
Engineer Shelves With the Sagulator Fine Woodworking (research)
Particleboard and MDF for Shelving (technical bulletin) Composite Panel Association (official source)
Practical Engineering: Down With Sagging Shelves Journal of Light Construction (Harris Hyman) (research)
Architectural Woodwork Standards, 1st ed., Section 10: Casework AWI, AWMAC and WI (official source)
California Residential Code R1001.11: Clearances, Mantels and Combustible Trim California Building Standards Commission (via GoCodeBook), 2025 edition (official source)
Fireplace Mantel Clearances Journal of Light Construction (research)
California Residential Code R1004: Factory-Built Fireplaces California Building Standards Commission (via GoCodeBook), 2025 edition (official source)
Seating and Storage for Any Space Fine Homebuilding (Gary Striegler) (research)
CPSC Warns Consumers of the Deadly Dangers of Storage and Toy Chests US Consumer Product Safety Commission (official source)
SQUIGGLY Flexible LED Tape Light Installation Guide (IG081720-1.0) Diode LED (official source)
UL Question Corner: Low-Voltage LED Luminaire Drivers IAEI Magazine (research)
Cost of Custom Built-Ins Cabinets by Alan (research)
Custom Fireplace Built-In Cabinetry, Countertop and Floating Shelves Cypress Designs (Minnesota) (research)
How Much Do Built-Ins Cost? Brooklyn Based (quoting Hudson Cabinetry Design) (research)
Built-In Bookshelves Cost HomeAdvisor (research)
Built-In Bookshelves Cost HomeGuide (research)
Pricing a Nice Built-In Cabinet WOODWEB Knowledge Base (research)

Changes: Oct 31, 2026: Initial publication after owner approval. Built from Clamp's catalog (the built-in, finish, species, crown, glass door, lighting and window seat lines priced that day), shelf span references, the residential code's fireplace trim rule, CPSC and lighting listings, and shops' published prices, by two research passes and an independent fact-check.