They must have meant that INSIDE filming was only done at that time or they just didn't want people flocking to the house, because filming definitely was being done there throughout the entire run of the series. They would post an upward pointing arrow at the entrance of Wildwood (the street leading to Aspen) whenever filming was to take place. I tried to drive to the house once when filming was obviously taking place (many cars with cards on them were parked along Wildwood and the sign was posted), but a police officer was standing at the entrance of Aspen screening any car that tried to turn in.HBO already did a special with the real owners of the house and gave a tour. The owners confirmed that the house was only used on the pilot episode. The inside of the house was actualy filmed on set in NY.
They would also post "crew" signs, which I once followed, ending up at the Grandview School parking lot. It was filled with crew trailors, but no one was there.
If you stop in at the Matarazzo Nursery/Market on Mountain Avenue, you can see photos of the characters posted there. The owner was Mayor of our town when the series began. The "house" that the mob boss (don't remember the character's name) that had the over-weight wife is in that vicinity as well.
My son's wife-to-be is employed at the "Bada Bing" (Satin Dolls")(not a dancer), so she naturally has met some of the characters.
I was surprised to see that Zillow has valued the Saprano house at under a million. That really does seem too low. A house on our nearby street sold last year for 815K; and to my shock and disbelief, the buyer tore it down and built a house that was priced at 2 million, which sold before completion. It has no pool, and while very nice, doesn't look as impressive to me as that one does...not to mention the fame attached to it. It would be interesting to see what that house would sell for, but I would have to guess that it would be well over one million. Check out Coldwell Banker to get an idea of the prices are in North Caldwell, NJ, and I think you would agree.