Bishop, J.

It is the statute that when any city shall have established a street grade, and an abutting owner improves his property in accordance therewith, and such grade shall thereafter be altered in such manner as to damage, injure, or diminish the value of such abutting property, the city shall pay to the owner the amount of the damage thus sustained. Code, section 785.

Accepting the statute as having force according to the terms thereof, the question presented by counsel for appellant is this: “ Can a property owner who improves his property in accordance with an established grade, and who thereafter voluntarily changes his improvements to conform to a newly established ordinance or paper grade, before the city does any act to conform the physical surface of the street to the latter grade, recover damages when the city does finally bring the street to the latter grade ? ” The court below gave answer in the affirmative to such question, and, as we think, rightly so. It is true, as contended for by counsel for appellant, that the mere passage of an ordinance providing for a change in the grade of a street is not of itself sufficient to give rise to an immediate cause of action oh the part of an abutting property owner. We have so held repeatedly. Hempstead v. Des Moines, 63 Iowa, 36; Stritesky v. Cedar Rapids, 98 Iowa, 373; Buser v. Cedar *455Rapids, 115 Iowa, 685. And in~the case last cited it was said, “ The reason for this rule is that the passage of the ordinance causes no injury, and the city may never attempt to carry it out by actually changing the level of the street.” The theory of counsel seems to be, however, that the question of injury and damage must be determined solely from the view point of the conditions actually existing at the time the,physical change in .the street is made to occur; and it is the argument that if a property owner, acting upon his own motion, has so graded or otherwise treated his property as that when the street improvement comes to be made the same is not productive of any immediate injury or damage — that is, injury and damage based solely upon the conditions then existing and present — there can be no recovery.

With this contention and argument we find ourselves unable to agree. In the first place, and as applied to the instant case, we must presume that the city authorities, in adopting the ordinance providing for a change in grade, acted with full knowledge of the conditions then existing; and they must be held to have anticipated that property owners along the line of the street would take notice of the ordinance provisions, and in making future improvements, would conform to the grade as thereby established. In effect, therefore, the fixing by ordinance of a grade level for the street was at once an invitation and a warning to all property owners to make their improvements to correspond with such grade. More than this, the ordinance, when taken in connection with the provisions of the statute, had the further effect to give positive assurance that, when the surface of the street should be actually changed to conform to the new grade level, all damages to abutting property proximately caused thereby would be paid by the city. Now, manifestly enough, the assurance thus given could not, at the will of a property owner, be extended to cover damage resulting from injury to his property on account of improvements made subsequently and in disregard of the new grade. *456Thus in Farmer v. Cedar Rapids, 116 Iowa, 322, it appeared that Farmer, a lot owner, improved his property, having reference solely to an original grade which corresponded with the natural surface; and all this notwithstanding the level of a new grade as established for the street, was between two and three feet above the natural surface. When, thereafter, the city raised the street to the new grade level, Farmer brought suit to recover damages occasioned to his property thereby, and a recovery was denied. In the course of the opinion it is said that the fixing of the new grade was an assertion on the part of the city that the street improvements, when made, would be in accordance with the level designated thereby, and, further, that “ the statute simply awards damages sustained by -any who have acted in reliance on this assurance, and, because of the city’s subsequently changed plans, been injured.”

Nor, on the other hand, does it stand to reason that an abutting property owner, who has acted in faith of the ordinance, should be held remediless, at least to recover the amount of the expense reasonably incurred in bringing his property from the level of the old to that of the new grade; and that is all that is involved in the instant case. Of course, a right to bring suit for recovery does not accrue, as we have seen, until the ordinance shall he followed by a physical change in the street surface; but, in our view, there can be no good reason for saying that the damage sustained by this plaintiff by the change of grade is not as much of a reality as though she had waited until after the grading of the street, and then had gone to the same amount of expense in bringing her property to grade. The city was not injuriously affected in the least by what she did, and no consideration moved to its exoneration.

The situation presents no element of waiver or estoppel. The plaintiff simply accepted of and acted upon the promise that, when the city should bring the street to grade, it would pay her at least the expense of bringing her lot up *457to such grade. If it suited ber convenience to proceed at once to tbe work of grading, and, in doing so, sbe cbose to take tbe cbance of a failure to grade tbe street, and therefore tbe cbance of a right to recovery from tbe city, there is no principle upon which tbe city can be beard to say that tbe cbance so taken by ber operated to relieve it of all liability in the premises, past, present, and future. Tbe case of Ressegieu v. Sioux City, 94 Iowa, 543, cited and relied upon by counsel for appellant, does not support tbe contention made by them. While somewhat dissimilar in its facts, we think tbe case, in principle, fairly gives support to tbe conclusion reached by us in tbe instant case.

It follows from what we have said that there was no error in tbe judgment, and it is affirmed.