There are factors that contribute to a cost of repair of ANY crack.
First of all, one needs to understand that if any repair is done for a crack, it MUST BE REPAIRED FROM THE OUTSIDE FIRST. On the outside wall where the crack is located, it must be dug right to the footing. Once you expose the weeping tile that rests along side of the footing, you need to run a water test to make sure that the water running through the weeping tile is flowing away from the building and not clogged.
If the water flows and does not run back then there is no blockage and the repair can continue. If the weeping tile is blocked somewhere, it will cause the water to flow back. Thats when the job gets more expensive because now you have to have the entire wall completely exposed to locate the problem area.
Costs here in Canada for a typical crack repair starts at $250.00 per linier square foot. Each crack repair needs to be dug at 3 foot wide and 3 foot out from the building, making it 6 linier foot. That makes the minimum cost to $1500.00 canadian. Other factors that can make the price go up are when the digging must be all done by hand to prevent any gas, cable, hydro and phone lines underground to be cut when using an mini excavator.
If the area that needs repair is in a spot where a small excavator cannot get to, costs can go up.
If the customer is willing to pay for and assume all liabilities for lifting the machine over the building to the rear, then whatever the cost is to do just that will be added. If there are trees, shrubs, fencing etc in the way, then they must be removed which would add another extra cost.
***PLEASE NOTE*** I DO NOT RECOMEND ANY CRACKS TO BE REPAIRED BY USING AN INJECTION FROM THE INSIDE WITHOUT FIRST DIGGING ON THE OUTSIDE WALL.
The reason for that is very simple for 2 reasons.
1. If repaired by injection from the inside, there is still a possibility of water still within the wall, and at the first winter that comes along, the cold will cause the water to freeze which will cause expantion that leads to a bigger crack.
2. If the ground shifts for any reason, there is no injection that I have ever known about that will not seperate apon shifting, leaving the original crack exposed to more penatration of more water.
If the outside has been repaired and water proofed, and you want to do an injection on the inside, then that will be fine, but only after the outside has been done.
Depending on the size and the amount of repair needed will be the judge. If you need an excellent foundation expert contact me directly I've been using the same company for over 3 years and have had many clients come out ahead. Low estimates, retired SF US ARMY. Craig Sneed is my go to guy.
Keller Williams Realty
Real Estate Consultant 3x US Army Vet.
Only a contractor will be able to acurately estimate the cost to repair a crack. I recommend that you grab the yellow pages and make a couple of phone calls to masonry contractors, explain your situation and ask for a quick quote. They may want to see the property, this is very normal. I hope that helps.