The Improvement Ledger, No. 18 of 20<\/p>\n
Toby Schifsky, an agent since 1991, guessed this one at $120,000 because a bedroom should cost less than the fanciest kitchen. He was wrong, and his own earlier instinct explains why: an addition is almost another house.<\/p>\n
Entry No. 18 is the biggest number in the book. A midrange primary suite addition, the project the printed course still calls a master suite, cost $156,741<\/b> in the 2021 national Cost vs. Value data, the most expensive of all twenty projects. It returned $85,672<\/b>, a 54.7 percent<\/b> recoup. The shortfall, the part of the check that never comes back, was $71,069<\/b>. That is the largest single pile of unrecovered money anywhere in the rankings.<\/p>\n
Here is the interesting part. On a cost per square foot basis this project is actually the sane one. The suite is 24 by 16 feet<\/b>, 384 square feet including the bathroom, which works out to about $408 per square foot<\/b> in the 2021 national data. That lands right in the normal new construction range the instructors quote. Compare the 48 square foot bathroom addition from entry No. 20 at about $1,186 per foot. Same kind of work, triple the unit price, purely because of scale. Big additions are efficient. They are just efficiently expensive.<\/p>\nWhat the project actually includes<\/h2>\n
The printed spec: a 24 by 16 foot suite built over a crawlspace, a walk in closet and dressing area, a freestanding soaker tub, a separate 3 by 4 foot ceramic tile shower, a double bowl vanity with a solid surface top, carpet in the bedroom and tile in the bath. Clean modern finishes, a barn door separating the spaces in the course’s example, and pointedly no 24 karat anything.<\/p>\n
The course numbers, No. 18 of 20, 2021 national report<\/p>\n
Why does a well built suite return barely half? Because past a certain check size the market simply stops paying. The course’s summary tables show every project over $30,000 in the 2021 national data returning between 53.1 and 57.9 percent, no exceptions, whether the spend is $38,813 or $156,741. Cost climbs four times over and the return does not move. Buyers pay for bedrooms and function they can count. They do not reimburse construction invoices.<\/p>\n
The instructors’ thumbnail for this one is blunt: you are going to spend about $150,000 and get about half of it back immediately. Nobody doubles their money on a primary suite. These projects are for people who are going to stay in the house.<\/p>\n
The 2025 San Francisco metro numbers say the same thing louder. Job cost $207,096<\/b>, resale value $53,396<\/b>, a 25.8 percent<\/b> recoup, against 32.2 percent for the Pacific region and 32.3 percent nationally. In current local data roughly three quarters of the check stays in the walls. If you see a suite addition pitched as an investment around here, someone is selling you a construction contract, not a return.<\/p>\n Cost recouped, 2025 report<\/p>\n