Ruling on opening a barbershop for men
Question

                What is the ruling on barbershops for men?.
Praise be to Allah.There is nothing wrong with 
    opening barbershops for men or engaging in this profession, so long as one 
    avoids haraam things such as shaving beards, removing any part of the 
    eyebrows or cutting the hair in styles that resemble kaafirs. See question 
    no. 34722 and 
    1189. 
Shaykh Ibn ‘Uthaymeen (may 
    Allaah have mercy on him) was asked: Someone is saying that he has a 
    relative who owns a hair salon that is rented out to an agent and he advised 
    him that this work is haraam, and that the money earned is haraam, and that 
    it is not permissible to shave Muslims’ beards. He said: I do not take 
    anything from the agent except the rent for the store, one hundred and fifty 
    riyals, and the people are free to shave their beards, and I do not force 
    them to have them shaved by him. 
He replied: 
If he writes and posts a 
    notice in this salon saying that it is not allowed to shave beards, and if 
    anyone who asks to have his beard shaved, he refuses to do that, then there 
    is nothing wrong with seeking provision from Allaah. But if he will shave 
    the heads and beards of anyone who asks, then it is not permissible, and he 
    should change this salon into something better. The one who gives up 
    something for the sake of Allaah, Allaah will compensate him with something 
    better than it. To sum up:  
Opening salons and 
    barbershops is subject to further discussion. If the person will refuse to 
    shave that which it is haraam to shave, there is nothing wrong with it, as 
    it is a means of earning a living. But if he will shave whatever the 
    customer asks him to shave, even if it is haraam, then it is not 
    permissible. End quote from Liqa’ al-Baab il-Maftooh (79/13). 
He (may Allaah have mercy 
    on him) was also asked: I have some stores and I want to rent them out to 
    some salons and barbershops. Is there anything wrong with that? 
He replied: There is 
    something wrong with that if you rent the stores to barbers as it is well 
    known that barbers usually shave everything; they shave heads and beards and 
    they may shave beards more than heads as this is the norm. Based on this, it 
    is not permissible to rent out stores to barbers unless you stipulate that 
    they should not shave beards; in that case there is nothing wrong with it. 
    If it is proven that he shaved beards in this store then the landlord of the 
    store will have the right to cancel the contract, because the renter agreed 
    to a valid condition but did not fulfil it. This is the answer to renting 
    out stores to barbers, i.e., it is not permissible to rent them to them 
    unless it is stipulated that they should not do anything haraam in them such 
    as shaving beards, because renting to them is helping them in doing this 
    haraam action, and Allaah says (interpretation of the meaning): “do not 
    help one another in sin and transgression” [al-Maa’idah 5:2]. The fact 
    that it is haraam to rent to them is also indicated by the fact that the 
    Prophet  (peace and blessings of Allaah be upon him) said: “When Allaah 
    forbids a thing, He also forbids its price” and the rent is the price that 
    the renter gets for use of it. 
End quote from Fataawa 
    Noor ‘ala al-Darb. 
And Allaah knows best.