How to Put Up a Temporary Wall in an Apartment: A Step-by-Step Guide

Converting a one-bedroom into a two-bedroom or carving a home office out of a studio is a rite of passage for big-city renters. The challenge is doing it without screwing into anything the landlord cares about or violating fire and egress code. Knowing how to put up a temporary wall in an apartment the right way means a wall that looks built-in, stands solid for years, leaves no mark when removed, and passes the smell test if a city inspector ever shows up. The 8-step process below is the same one professional pressurized-wall installers in New York and Chicago use, scaled for a confident DIYer.

Before You Build: Lease and Code Checks

Pull your lease and look for any clause about structural modifications. Many leases prohibit “permanent alterations” but say nothing about temporary partitions. A pressurized wall held by friction with no fasteners into floor or ceiling is, legally, a piece of furniture. Even so, send your landlord a written description with a sketch before you start. Get written approval.

Check three code items in your jurisdiction. First, egress: bedrooms in the 2021 IRC require a window with at least 5.7 square feet of net opening (24 inches minimum height, 20 inches minimum width). Second, smoke detector coverage per NFPA 72 — every new sleeping area needs an alarm. Third, HVAC and natural light to the new room.

Tools and Materials You Will Need

• (7) 2×4 studs 8 feet long for an 8-foot wall — adjust by 1 stud per 16 inches of wall length
• (2) 2×4 plates the full length of the wall (top and bottom)
• (2) sheets of 1/2-inch drywall (one side) or (4) sheets for both sides
• Pressure jack screws (4) — McMaster-Carr part 95075A124 or equivalent
• 1 box of 2.5-inch construction screws
• Joint compound, mesh tape, primer, paint
• Circular saw or miter saw
• Drill driver with Phillips and square bits
• 4-foot level, tape measure, chalk line
• Stud finder, framing square
• Drop cloths and painter’s tape

Total materials cost for an 8-by-10 foot wall: about $280 from Home Depot or Lowe’s.

Step 1: Measure and Plan the Wall Location

Mark the wall location on the floor with painter’s tape, not pencil. Verify the clearance to existing doors, windows, smoke detectors, and HVAC registers. The new wall must not block any required window egress, must leave at least 36 inches of doorway width on either side, and must leave at least 7 feet of clear floor area inside any new sleeping room.

Measure floor-to-ceiling height at three points across the proposed wall location. Subtract 1/2 inch from the shortest measurement — this is your stud length. Apartment ceilings often vary by 1/2 to 3/4 inch end to end; build to the lowest dimension.

Step 2: Cut the Plates and Studs

Cut the top and bottom plates to the full wall length. Cut studs to the calculated length. Lay both plates side by side, mark stud locations every 16 inches on center starting from one end, and add an extra stud at any planned door location.

For an 8-foot wall, you need 7 studs total: 2 end studs, 5 field studs, plus extras for door framing if applicable.

Step 3: Assemble the Wall Flat on the Floor

Lay the wall flat on the floor with both plates and studs in position. Square the corners with a framing square. Drive two 3-inch screws through each plate into the end of each stud. Use construction screws rather than nails — they hold better under pressure load and they back out for disassembly later.

Check the wall for square by measuring corner to corner diagonally. If the two diagonals are within 1/8 inch of each other, the wall is square.

Step 4: Stand and Tension the Wall

Stand the wall up with a helper. Wedge shims along the bottom plate to position it exactly where you want it. Now install the four pressure jack screws — two at the top plate near each end, screwed up into a 3/4-inch plywood pad against the ceiling. The pads spread the load across the ceiling drywall without denting it.

Tighten the jacks until the wall is fully wedged between floor and ceiling. Test by pushing hard on the middle of the wall — it should not move. A properly tensioned pressurized wall holds 200 pounds of lateral force without movement.

Step 5: Drywall One or Both Sides

Standard 1/2-inch drywall screws to the studs with 1-1/4 inch drywall screws every 8 inches along studs. Mud the seams with mesh tape and three coats of joint compound — apply with a 6-inch knife, then 10-inch, then 12-inch — sanding between coats with 120-grit, then 220-grit.

For sound isolation, do both sides and fill the cavity with R-13 mineral wool batt insulation. This single addition cuts sound transmission by 15 to 20 decibels — the difference between hearing every word and just a muffled rumble.

Step 6: Prime and Paint

Two coats of latex primer first, then two coats of finish paint to match the existing apartment walls. Sherwin-Williams ProClassic, Behr Premium Plus, or Benjamin Moore Regal Select all work. Plan on $80 to $120 for paint and primer for an 80-square-foot wall.

Step 7: Add a Door If Needed

For a doorless opening, build a header from a single 2×6 spanning the rough opening — this is fine for 32 to 36 inch openings in a non-load-bearing temporary wall. For a real door, frame a 33-1/2 inch rough opening for a 32-inch prehung door (Masonite or Jeld-Wen prehung interior, $130 to $200 at Home Depot).

The door slab swings on hinges screwed into the temporary wall frame. As long as you tension the wall properly, the door operates the same as any installed door.

Step 8: Final Code and Safety Check

Once the wall is up and painted, verify three things. Smoke detectors are audible in every sleeping area (test with the button — should hit 75 decibels at the pillow). The bedroom window still meets the 5.7 square foot egress requirement. Any HVAC register that the new room blocks needs to be rebalanced or supplemented with a tower fan.

Disassembly Time at Lease End

One of the advantages of a pressurized temporary wall is reversibility. To remove: release jack screws, lower top plate, pull screws from studs, and stack the lumber. Patch the plywood pad marks on the ceiling with spackle if any indentation remains — usually under 1 hour of touch-up.

The whole removal takes about 4 hours for an 8-foot wall. Lumber can be reused on the next project or carted to the curb.

Cost Summary and Time

Materials all-in for a single-sided 8-by-10 wall: $280 to $380. Double-sided with insulation and a door: $450 to $700. Construction time for a confident DIYer: one weekend. Hiring a pressurized-wall company in NYC or Chicago for the same wall: $1,200 to $2,000. The DIY route saves about 65 percent and produces an equally solid wall — provided you follow the lease, the code, and the tensioning steps carefully.