Coffins could be stacked on top of each other in a Somerset village cemetery in an attempt to save space.
About 100 grave plots are left in the cemetery in Banwell, which the parish council said would be at full capacity in about 25 years.
Parish clerk Tony Jay said the new system would double the amount of space and be less costly than building on a new plot of land.
Mr Jay said councillors appreciated that it was "an emotive subject".
He said: "It's controversial, but a coffin will be buried in the ground as it always has been."
The modular grave system allows for up to four coffins per burial plot, although the limit in Banwell would be two coffins.