السلام عليكم ورحمة الله وبركاته
1. The prevailing opinion among scholars, including those of the Hanafi, Shafi’i, and Hambali schools of jurisprudence, is that it is recommended to perform the nikah in a Masjid. Some Maliki scholars also support this majority view.
2. This majority based their view on both reasoning and textual proofs. According to their reasoning, the marriage contract is considered an act of worship, and Masajid are designated places of worship. Textual evidences supporting this include:
2.1. A’ishah رضي الله عنها narrated from the Messenger of Allah 
said, “Announce this marriage, have it in the masjid, and beat the drums.” Narrated by Imam al-Tirmidhi with a sound chain of transmission.
2.2. Imam Bukhari narrates that a lady entered the Masjid, offering herself in marriage to the Prophet of Allah . The Prophet advised that he had no interest in marriage. Subsequently, one of the companions stepped forward and said, “Marry her to me, O Messenger of Allah.” The Messenger eventually married her off the companion. All of this took place in the Masjid.
والله تعالى أعلم
And Allāh knows best
النصوص المستندة إليها
4/ 207 مغني المحتاج
ويسن أن يتزوج في شوال، وأن يدخل فيه، وأن يعقد في المسجد، وأن يكون مع جمع، وأن يكون أول النهار.اهـ
فتح القدير 3/ 189
ويستحب مباشرة عقد النكاح في المسجد؛ لأنه عبادة، وكونه في يوم الجمعة اهـ
منح الجليل شرح مختصر خليل 8/ 86
و) جاز (عقد نكاح) بمسجدٍ، واستحسنه جماعة اهـ)