Question: There is a widespread custom amongst many to recite ["Mah Tovu"](https://en.wikipedia.org/wiki/Ma_Tovu) upon entering the synagogue.\* My question is whether you should recite it when you daven at home. 

For what it's worth, I daven [Nusach Chabad](https://en.wikipedia.org/wiki/Tehillat_Hashem), but I would be interested in hearing all the opinions for other rites as well, if there are conflicting opinions depending upon nusach.

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\*I would be inclined to say this is a universal custom, but I'm not so sure.

Answer: 
I haven't found any source that prohibits saying "Ma tovu" at home. However, my sense is that it seems inappropriate to do so. Here are the angles for my thinking:

[Beurei Hatefilla](http://beureihatefila.com/files/Yigdal_Adon_Olam_and_Ma_Tovu.pdf) mentions that the Ma Tovu paragraph being part of tefilla is not mentioned in the Talmud. It first appears in the Siddurim of Rav Amram Ga'on and Rash"i. In both of their introductions, they state that one should say Ma Tovu upon entering the *Bet Knesset*.

[Talmud Sanhedrin 105b explains](https://www.sefaria.org/Sanhedrin.105b.17?lang=bi&with=all&lang2=en) (from Sefaria translation):

> 
> Rabbi Yoḥanan says: From the blessing of that wicked person, Balaam,
>  you can ascertain what was in his heart. God transformed the curses
>  that he planned into blessings. He sought to say that they should not
>  have synagogues and study halls, and he said instead: “How goodly are
>  your tents, Jacob” (Numbers 24:5), a blessing on their synagogues.
> 
> 
> 

So, we see from here that this is a specific reference to shuls. If you say this in your home, it seems out of place. This seems more true when viewing the next sentence in the Ma Tovu par.

> 
> ואני ברוב חסדיך אבוא בתיך
>  (loose translation):
>  With your abundant graciousness, I come to your house.
> 
> 
> 

"Your house" is a reference to a shul, not, your personal home.
Yes you should. It is part of the davening and being about a shul does not mean it can only be said in shul . In fact most say up until pezuke d'zimra at home and then start from Rabbi yishmael with the minyan. Specific to nusach chabad would be saying everything up until "ezehu mikomon" at home so one can put tefillin on at this point when getting to shul.