A couple of CT strategies :

Divide and conquer :

Have a sniper roam the map, staying on the CT side of the river. Fireteam 1 goes across the bridge from spawn, and flanks the left side of the house. Team 2 goes right from spawn, and advances across the other bridge. If you have the players, fireteam 3 advances using all available cover, and then drops into the river right in front of the house. Timing is crucial, so make sure someone in each team is keeping the larger team updated as to position, contacts and any other relevant info. Make sure you get everyone in position, and let the sniper do plenty of recon for you.

When it's time to breach, team 1 goes down towards the river and in through at the bottom of the stairwell. Team 2 goes in the front door. Team 3 goes up the stairs from the river and in. The sniper should stay in position, calling threats and dealing with them where possible.

Extract to the RP outside the house, or failing that, call for backup and take the hostages along the river to CT spawn.

Smash 'n' snipe :

Assuming a team of 8, have 4 of 5 players load up with AUG's, scouts, and any kriegs that you stole in the previous round. The rest need to buy whatever CQB weapon they're best with, followed by flashes, then smoke, then any other items you want to buy.

The scoped players mill around on the CT side of the river, sniping anything they can, whilst the CQB team sneaks into position in the middle of the map. As soon as the snipe team is engaged *heavily*, the CQB team makes a smash and grab raid on the hostages, ideally with a fast extraction to the RP by the house. Entry route for this team is into the river and then up both the drainpipe and stairwell. For this assault to work, it's more important than ever that you don't waste any time shooting at an OpFor that isn't a major threat.

We used both these plans to great effect a couple of nights ago. I'm sure more strategies will be forthcoming for both sides, considering the popularity of the map.