Can't buy lumber for my house [duplicate]

I did a mission for the Dawnguard where I was to kill a vampire at Half-Moon Mill. And now later in the game, I can't buy sawn logs for my house.

2 Answers

The half-moon mill is not the only mill in skyrim. There are several other lumber mills where you can go to buy lumber for your house.

A list of lumber mills below:

• Anga's Mill, west of Windhelm.
• Deadwood Lumber Mill, Falkreath.
• Solitude Sawmill, Haafingar.
• Half-Moon Mill, Falkreath, at Lake Ilinalta.
• Heartwood Mill, The Rift, at Lake Honrich.
• Dragon Bridge Lumber Camp, Haafingar.
• Mixwater Mill, Eastmarch.
• Riverwood's lumber mill.
• Morthal's lumber mill.
• Ivarstead's lumber mill.

Source: Skyrim Wiki: List of Lumber Mills

Actually, you can buy lumber from your steward. That's usually much easier because they hang out at your house, requires no travel, and is available instantly.