Class B and C Apartment Renovation: Light Rehab vs. Heavy Rehab

Short answer: a light rehab replaces what you can see inside the existing layout, such as flooring, paint, counters, cabinet fronts, fixtures, lighting and hardware, and can usually be done unit by unit as leases turn. A heavy rehab opens walls and ceilings to replace or reconfigure plumbing, electrical or HVAC, often changes layouts, and takes units offline for longer. In UTS BuildPros planning ranges for Texas and Oklahoma in 2026, a light value-add package runs about $5,000–$12,000 per unit and a full classic-to-premium interior about $12,000–$25,000, before contingency. Work behind the walls sits above those ranges and is priced unit by unit.

What "Class B" and "Class C" Mean Here

There is no official grading standard for apartment classes; as a March 2025 Multifamily Dive report put it, firms classify by different mixes of age, rent, finishes and amenities. Owners, brokers and lenders use the letters as shorthand for a property's age, condition, finishes and rent level relative to its own market. Class B is usually an older, sound property with dated finishes; Class C is usually older still, with deferred maintenance and systems near the end of their life. That relative definition is why the rehab decision has to come from the property's condition, not from the letter.

Light Rehab: Finishes Inside the Existing Layout

A light rehab, sometimes called a light value-add, replaces surfaces and fixtures without moving walls or extending systems. Typical scope: luxury vinyl plank in place of carpet, paint, countertops, cabinet doors and hardware or cabinet paint, sinks and faucets, light fixtures, appliances, blinds and door hardware.

When it fits. The building's plumbing, electrical and HVAC are sound, the floor plan leases, and the gap between your classic units and renovated comps is about finishes. This is usually a Class B decision.

How it runs. Unit by unit as leases turn, often folded into the normal make-ready so the unit is down for one turn rather than two. It suits properties that need to keep occupancy and cash flow steady while the program proves its rent premium.

Planning range. About $5,000–$12,000 per unit in UTS BuildPros 2026 planning ranges, on top of what a standard make-ready turn costs ($1,500–$4,000 per unit in the same ranges). Unit size and finish level move it.

Heavy Rehab: Behind the Walls

A heavy rehab replaces or reconfigures what is inside walls, floors and ceilings: supply and drain lines, electrical panels and branch wiring, HVAC equipment and ductwork, sometimes subfloors, framing or the layout itself, followed by new finishes throughout.

When it fits. Systems are failing or near the end of their life, water intrusion or repeated leaks show up in the maintenance history, the electrical service cannot carry modern loads, or the layout itself will not lease. This is more often a Class C decision, and it is the one most likely to come with deferred maintenance on the exterior and site as well.

How it runs. Units are vacated and taken offline for the duration, and the work is usually organized by building or by stack so plumbing and electrical risers can be worked once. Finishes go in last. Our sequencing guide covers why the order matters.

Planning range. A full classic-to-premium interior runs about $12,000–$25,000 per unit in UTS BuildPros 2026 planning ranges. Once failing systems are in scope, the unit is priced individually rather than from a band, because what is behind the wall is not known until it is opened.

Where the Building Code Draws the Line

The contractor's label matters less than the code's. Under the 2021 International Existing Building Code, the model code a city adopts with its own amendments, a Level 1 alteration is "the removal and replacement or the covering of existing materials, elements, equipment or fixtures using new materials, elements, equipment or fixtures that serve the same purpose." That describes most light rehab. A Level 2 alteration includes "the addition or elimination of any door or window, the reconfiguration or extension of any system, or the installation of any additional equipment" where the work area is 50 percent or less of the building area. Level 3 applies "where the work area exceeds 50 percent of the building area."

A heavy rehab that reconfigures systems across most of a building can move into Level 3, which carries more upgrade requirements than a finish swap. Which edition and which amendments apply is set by the city, so confirm with the local building official before the scope is fixed. Trade permits for plumbing, electrical and mechanical work are pulled by the licensed contractors who do that work; UTS BuildPros does not self-perform trades.

Lead Paint in Pre-1978 Buildings

Check the year built before the scope is fixed. In housing built before 1978, EPA's Renovation, Repair and Painting rule requires renovations that disturb painted surfaces to be done by a certified firm using certified renovators and lead-safe work practices, unless the work falls under the minor repair and maintenance exception of 6 square feet or less per room inside or 20 square feet or less outside. A heavy rehab almost always disturbs more than that, and even a light rehab can, for example when cabinets or trim come out. UTS BuildPros is an EPA Lead-Safe Certified Firm.

How to Decide Between Them

Start with the systems, not the finishes. Pull the work order history and walk a sample of units with the walls in mind: leaks, panel brands and capacity, water heater and HVAC age, slab or subfloor movement. If those are sound, a light rehab is usually the efficient choice.

Test the rent ceiling. Renovated comps in your submarket cap what any rehab can add. Our renovation ROI guide walks through that test.

Mix the two where the property is mixed. Many properties need both: a light package for most units and heavy work in specific stacks or buildings where the systems have failed. Pricing them separately keeps one from hiding inside the other.

Carry contingency. We recommend 15 to 20 percent on older properties, more on a heavy rehab, because conditions behind the wall are unknown until the wall is open. Our apartment renovation budget guide covers the hidden costs owners miss.

How We Work

UTS BuildPros runs value-add and repositioning programs and unit turns across Texas, Oklahoma and Arkansas, including in Dallas and Houston. We price light and heavy scopes as separate line items so you can see what each unit type costs. Call (940) 231-2640 or request a property walk.

Sources

International Code Council, 2021 International Existing Building Code, Chapter 6, Sections 602.1–604.1 (text via UpCodes).

U.S. EPA, Renovation, Repair and Painting Program: Contractors; 40 CFR Part 745, Subpart E (§745.83 minor repair and maintenance thresholds).

Multifamily Dive, The ABCs of apartments: Demystifying the debate over asset classes, March 2025.

UTS BuildPros 2026 per-unit planning ranges, from our apartment renovation budget guide.