Everest Base Tents dismantled before 20th Oct

Around1-2km far from the Rongbuk Monastery (the highest monastery in the world), all the tent houses have been dismantled recently (finished before 20th Oct 2019).

Snow Road to Everest

There are about 50 tents, which will be dismantled from every Oct to next April, due to the low temperature, most time there will be heavy snow. Until next April people will rebuild the tents there again to provide the accommodations for the tourists there. After dismantling, tourists can stay in Rongbuk guesthouse there which is built of bricks and stones.

More than 50 tent house at Everest Base Camp were opened by villagers from Tashizong village after they obtained the operating qualification through public election. The beds in each tent are arranged in a standard format and priced uniformly. A portion of the profits should be handed in and distributed by the village committee to those Tibetan families who did not get the qualification. This kind of way put an end to the vicious competition between tents-owners, protected the legitimate interest of those villagers who did not run the tents there.

Typically, each tent can accommodate 8-10 people, all of whom are bunk beds. After October, these tents will have to be torn down so that they can't accept tourists. Obviously in 2019 it’s dismantled earlier due to the heavy snow there already.

It's not that the current level of technology doesn't allow permanent construction at Everest base camp, it's that it's not allowed.
The most important reason must be to prevent ecological damage. The ecological environment of Everest base camp is very fragile. Close of the tent houses there in winter will give a break for the environment.