3 deleted 12 characters in body
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Partial:

KEY: Red/blue/green represent the three owners.
The two shades of brown represent hypothetical deductions, where the two browns represent two owners in some order.
Grey represents a candidate for the house.

enter image description here Looking at the red/browns, we see that if all those ares are owned by a single brother, we get a contradiction. So, one of those squares is the house.

enter image description here Now we work from the other end. The browns represent red/green, but you don't know which is which until you do all this stuff which reveals that dark brown is red.

enter image description here That gives you all of this, and you do some more hypothetical browns work to make deductions.

enter image description here More hypothetical browns work (this time the browns are blue and green)

Note that the grid is 11x17 which is 1 mod 3, so the house takes up an area of 1 mod 3. This removes some grey possibilities. Also, I noticed that I coloured too many areas grey - the contradiction will still occur with a smaller subset of lands. So, we get this:

enter image description here

Now, use a quick hypothetical to see exactly which house will cause a contradiction:

enter image description here

So we know that little area is the house. Fill out the rest of the top left:

enter image description here

And you're done! Someone with patience can work out what the top right corner is supposed to be to satisfy the area condition :P

Partial:

KEY: Red/blue/green represent the three owners.
The two shades of brown represent hypothetical deductions, where the two browns represent two owners in some order.
Grey represents a candidate for the house.

enter image description here Looking at the red/browns, we see that if all those ares are owned by a single brother, we get a contradiction. So, one of those squares is the house.

enter image description here Now we work from the other end. The browns represent red/green, but you don't know which is which until you do all this stuff which reveals that dark brown is red.

enter image description here That gives you all of this, and you do some more hypothetical browns work to make deductions.

enter image description here More hypothetical browns work (this time the browns are blue and green)

Note that the grid is 11x17 which is 1 mod 3, so the house takes up an area of 1 mod 3. This removes some grey possibilities. Also, I noticed that I coloured too many areas grey - the contradiction will still occur with a smaller subset of lands. So, we get this:

enter image description here

Now, use a quick hypothetical to see exactly which house will cause a contradiction:

enter image description here

So we know that little area is the house. Fill out the rest of the top left:

enter image description here

And you're done! Someone with patience can work out what the top right corner is supposed to be to satisfy the area condition :P

KEY: Red/blue/green represent the three owners.
The two shades of brown represent hypothetical deductions, where the two browns represent two owners in some order.
Grey represents a candidate for the house.

enter image description here Looking at the red/browns, we see that if all those ares are owned by a single brother, we get a contradiction. So, one of those squares is the house.

enter image description here Now we work from the other end. The browns represent red/green, but you don't know which is which until you do all this stuff which reveals that dark brown is red.

enter image description here That gives you all of this, and you do some more hypothetical browns work to make deductions.

enter image description here More hypothetical browns work (this time the browns are blue and green)

Note that the grid is 11x17 which is 1 mod 3, so the house takes up an area of 1 mod 3. This removes some grey possibilities. Also, I noticed that I coloured too many areas grey - the contradiction will still occur with a smaller subset of lands. So, we get this:

enter image description here

Now, use a quick hypothetical to see exactly which house will cause a contradiction:

enter image description here

So we know that little area is the house. Fill out the rest of the top left:

enter image description here

And you're done! Someone with patience can work out what the top right corner is supposed to be to satisfy the area condition :P

2 added 87 characters in body
source | link

Partial:

KEY: Red/blue/green represent the three owners.
The two shades of brown represent hypothetical deductions, where the two browns represent two owners in some order.
Grey represents a candidate for the house.

enter image description here Looking at the red/browns, we see that if all those ares are owned by a single brother, we get a contradiction. So, one of those squares is the house.

enter image description here Now we work from the other end. The browns represent red/green, but you don't know which is which until you do all this stuff which reveals that dark brown is red.

enter image description here That gives you all of this, and you do some more hypothetical browns work to make deductions.

enter image description here More hypothetical browns work (this time the browns are blue and green)

Now at this point I think you need to use the equal land area condition, but I didn't so much fancy counting up what's going on here, so I'll leave the last few steps to someone else. I did noteNote that the grid is 11x17 which is 1 mod 3, so the house takes up an area of 1 mod 3. This removes some grey possibilities. Also, I noticed that I coloured too many areas grey - the contradiction will still occur with a smaller subset of lands. So, we get this:

enter image description here

Like I saidNow, utilizing the total land area condition seems very arduoususe a quick hypothetical to me, and since it's late, I'll leave off heresee exactly which house will cause a contradiction:

enter image description here

So we know that little area is the house. Fill out the rest of the top left:

enter image description here

And you're done! Someone who enjoys counting and addition a lotwith patience can finish this off!work out what the top right corner is supposed to be to satisfy the area condition :DP

Partial:

KEY: Red/blue/green represent the three owners.
The two shades of brown represent hypothetical deductions, where the two browns represent two owners in some order.
Grey represents a candidate for the house.

enter image description here Looking at the red/browns, we see that if all those ares are owned by a single brother, we get a contradiction. So, one of those squares is the house.

enter image description here Now we work from the other end. The browns represent red/green, but you don't know which is which until you do all this stuff which reveals that dark brown is red.

enter image description here That gives you all of this, and you do some more hypothetical browns work to make deductions.

enter image description here More hypothetical browns work (this time the browns are blue and green)

Now at this point I think you need to use the equal land area condition, but I didn't so much fancy counting up what's going on here, so I'll leave the last few steps to someone else. I did note that the grid is 11x17 which is 1 mod 3, so the house takes up an area of 1 mod 3. This removes some grey possibilities. Also, I noticed that I coloured too many areas grey - the contradiction will still occur with a smaller subset of lands. So, we get this:

enter image description here

Like I said, utilizing the total land area condition seems very arduous to me, and since it's late, I'll leave off here. Someone who enjoys counting and addition a lot can finish this off! :D

Partial:

KEY: Red/blue/green represent the three owners.
The two shades of brown represent hypothetical deductions, where the two browns represent two owners in some order.
Grey represents a candidate for the house.

enter image description here Looking at the red/browns, we see that if all those ares are owned by a single brother, we get a contradiction. So, one of those squares is the house.

enter image description here Now we work from the other end. The browns represent red/green, but you don't know which is which until you do all this stuff which reveals that dark brown is red.

enter image description here That gives you all of this, and you do some more hypothetical browns work to make deductions.

enter image description here More hypothetical browns work (this time the browns are blue and green)

Note that the grid is 11x17 which is 1 mod 3, so the house takes up an area of 1 mod 3. This removes some grey possibilities. Also, I noticed that I coloured too many areas grey - the contradiction will still occur with a smaller subset of lands. So, we get this:

enter image description here

Now, use a quick hypothetical to see exactly which house will cause a contradiction:

enter image description here

So we know that little area is the house. Fill out the rest of the top left:

enter image description here

And you're done! Someone with patience can work out what the top right corner is supposed to be to satisfy the area condition :P

1
source | link

Partial:

KEY: Red/blue/green represent the three owners.
The two shades of brown represent hypothetical deductions, where the two browns represent two owners in some order.
Grey represents a candidate for the house.

enter image description here Looking at the red/browns, we see that if all those ares are owned by a single brother, we get a contradiction. So, one of those squares is the house.

enter image description here Now we work from the other end. The browns represent red/green, but you don't know which is which until you do all this stuff which reveals that dark brown is red.

enter image description here That gives you all of this, and you do some more hypothetical browns work to make deductions.

enter image description here More hypothetical browns work (this time the browns are blue and green)

Now at this point I think you need to use the equal land area condition, but I didn't so much fancy counting up what's going on here, so I'll leave the last few steps to someone else. I did note that the grid is 11x17 which is 1 mod 3, so the house takes up an area of 1 mod 3. This removes some grey possibilities. Also, I noticed that I coloured too many areas grey - the contradiction will still occur with a smaller subset of lands. So, we get this:

enter image description here

Like I said, utilizing the total land area condition seems very arduous to me, and since it's late, I'll leave off here. Someone who enjoys counting and addition a lot can finish this off! :D