In December of 1970 they started recording their fourth album and their sessions lasted till the next summer due to several factors like the band wanting the album to remain untitled, they wanted nothing written on it and no texts or credits anywhere on the album itself or on its outside or inside sleeves. They wanted their music to the talking but were talked out of it by their label and there were credits added to the albums inside paper sleeve, but it had nothing to help in identifying the album or its distributers on the front cover. It became known unofficially as Led Zeppelin IV and due to its powerfulness; it did manage to reach number two on the charts. Stairway to Heaven was one of the songs in the album and became the bands best song ever and also rocks best song ever.
In 1972, there was less touring and the band worked on their fifth album, released in the spring of the following year and was titled Houses of the Holy and despite the bad press reviews, reached number one. Their tour supporting the album broke all records of attendance at the time as well as the nightly gate cash receipts. They established their own record label called Swan Song in 1974 and the following year saw the release of Physical Graffiti, their double albums release from Swan Song. Their label also managed to sign artists like Bad Company, Pretty Things, Maggie Bell, Detective, Dave Edmunds, Midnight Flyer, Sad Cafe and Wildlife.
The label remained successful for the duration of the bands existence and was folded less than three years after they disbanded (Davis 47). This was also an immediate success. Their planned tour had to be cancelled when lead singer Plant and his wife were involved in a serious car crash and it took him a whole year to recuperate. Their album, Presence was released in spring of 1976 and debuted at number one both in America and England despite poor reviews from the press and their movie, The Song Remanis the Same received poor reviews as well. The spring of 1977 saw the band resume their tour of America but two months later, the tour was canceled when Plants six-year-old son. Karac, died from a stomach virus. In Through the Out Door was released in September 1979 as their eight studio album and was recorded at the Swedish Polar Studio. It also showcased John Bonhams talents on the epic “Carouselambra.” Their final tour started in May 1980.