The House Crowd, which raises money for property projects via crowd-funding, is itself crowd-funding.
It is raising £750,000 in exchange for a 2.53% stake in the company, which it says is worth almost £29m.
The company was started in 2012 by Frazer Fearnhead, and claims to have 27,560 registered members and to have raised over £112m.
It started out as buying properties that could be let out, and in which investors could buy small chunks.
It has since evolved to offer a range of products, including peer to peer loans to people typically wanting to refurbish and sell a property.
Investors can also chip in to fund new homes development projects.
With its latest funding, The House Crowd aims to launch a new brand to appeal to millennials and launch a new mobile app called Money Mog.
It has already raised some £55,000 although launching its campaign only yesterday.
Meanwhile, property renting platform Inadash has almost reached its crowd-funding target.
By yesterday afternoon it was 97% of the way to hitting £350,000.
Inadash works with both renters and letting agents, who pay a monthly subscription fee.
Its chairman is industry veteran Michael Stoop.
Both campaigns are on Seedrs.