Single Frequency Networks (SFNs) are considered the optimal network configuration to maximize the spectrum efficiency and to minimize the cochannel interference problems in the advanced broadcasting planning. As a matter of fact, they have been widely used in the European countries since the dawn of the first Digital Terrestrial Television (DTT) standard, namely DVB-T. Their main advantage is that, providing that all the transmitters are time and frequency synchronized, the same content can be delivered over the whole network occupying a single RF channel. Nevertheless, the local/regional content delivery is still one of the major drawbacks for SFNs. In this paper, Layered Division Multiplexing (LDM) is proposed as the definitive technique that will allow the seamless delivery of local contents or targeted advertisements over SFNs. LDM is a spectrum efficient non-orthogonal multiplexing technology that has been adopted in the ATSC 3.0 Physical Layer Standard as Baseline Technology, which consists on the superposition of two or more data streams of different power. In this scenario, LDM upper layer can be used to deliver TDM-ed mobile-HD and 4k-UHD services, whereas the LDM lower layer with a negative SNR threshold (dB) can reliably provide seamless local coverage/service for each SFN transmitter without coverage gaps.