Hotel conversion room additions measure rooms added to a hotel company's system when an existing property converts from another brand, affiliation, or independent status.
They are a source-of-growth measure, not a measure of newly built lodging capacity.
Conversion growth can be faster than new construction
A conversion starts with an existing hotel building.
That can reduce the time needed to add rooms compared with a ground-up development, although the property may still require renovation, repositioning, technology integration, or brand-standard investment.
Marriott said roughly 33,400 rooms in its 2025 gross additions were converted from competitor brands. It also said more than 30% of rooms signed during 2025 were driven by conversion opportunities.
Gross additions are not net rooms growth
Conversion additions can increase gross room openings, but Net Rooms Growth also reflects deletions.
If a hotel company adds 30,000 converted rooms while 20,000 existing rooms leave the system, the conversion contribution does not translate one-for-one into net system expansion.
Conversions can change the economics of growth
Conversion-heavy growth can be attractive to asset-light hotel companies because the real estate already exists and the hotel owner generally funds the property investment.
For the brand company, the economic opportunity is usually future franchise or management fees rather than ownership of the hotel itself.
That makes conversion growth useful beside Hotel Franchised Room Mix and Hotel Managed Room Mix.
Primary-source examples
Hotel conversion room additions are most useful as a source-of-system-growth measure. They show how much expansion comes from reflagging existing supply rather than building entirely new hotels.
Part of the Hotel Operating Model
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