retaining wall

[newshop]

I am building a cinema room underneath my garden an would like some advise, I am going to dig out a 25 foot long x 16 foot wide x 10 foot deep hole in the garden then put a concreat roof on it, my problem is I will need a retaining wall to hold back all the soil, what is the best and most cost affective way of doing this.

Thank You
Terry

 

[rssteve]

had you had this designed or are you trying to make a large coffin?

 

[noseall]

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