Modular building collectors and investors are often asking the same question: What is the next LEGO modular building to retire? These Creator expert sets are highly collectible and desirable, and nobody wants to miss out on one because prices for these sets have historically skyrocketed immediately after retirement. So will 10218 Pet Shop be the next modular to retire? Let’s look at what has happened in the recent past with modular buildings. Three modular buildings have effectively retired since the end of 2013: 10197 Fire Brigade, 10211 Grand Emporium, and 10224 Town Hall. Fire Brigade and Grand Emporium had the same retail price and retired four years after they were introduced. The Town Hall had a higher price, higher piece count, and retired after approximately two and a half years, and retired alongside the Grand Emporium. This marked the first time that two modular buildings retired in the same year. From this, it would appear that the Town Hall was likely an outlier and the standard lifespan for current modular buildings is four years. 10218 Pet Shop is slightly over four years old now and stock has been difficult to find this year.