1. The point is made that the assessment is illegal because it was made to meet payments on the cost of the paving, which was incurred on an illegal contract. It appears that the city entered into a contract with a contractor to pave the street on condition that the payment for the work should be made in three instalments; one third payable on completion of the work, one third in twelve months from the date of the acceptance of the work, and one third in twenty-four months from that date. This contract is said to be illegal because in effect it amounts to the creation of a debt prohibited by the constitution of the State. Civil Code, § 6563. In Renfroe v. Atlanta, 140 Ga. 81 (78 S. E. 449, 45 *444L. R. A. (N S.) 1173), it was held that a contract between a municipality and a private corporation, whereby the latter agreed to construct a public improvement for a total sum, part of which was to be paid in the year in which the contract was made, and the balance in instalments extending through a series of years, amounted to the creation of a debt within the meaning of the constitutional provision that no municipality shall incur any new debt, except for a temporary loan or loans to supply casual deficiencies of revenue, not to exceed one fifth of one per cent, of the assessed value of the taxable property therein, without the assent of two-thirds of the qualified voters at an election for that purpose to be held as prescribed by law. The power to make the contract was not authorized by a popular vote, and the contract to pave the street was therefore illegal. The fact that the city levied a tax during the current year, sufficient to pay the city’s share of the expense, does not render the contract legal.
What, then, is the effect of the • illegality of a contract on the power to make and collect the assessment on the abutter’s property ? “If a contract for the construction of the public improvement has been let and an assessment levied to pay such' contract price, the validity of such contract is essential to the validity of the assessment; since otherwise the assessment would be levied to pay the claim not legally due against the city.” 1 Page and Jones on Taxation by Assessment, § 483. No lien can be fixed, in invitum, against abutting property to pay an illegal contract made by a city in the construction of a public improvement. Schwiesau v. Mahon, 110 Cal. 543 (42 Pac. 1065). In the present case the amount sought to be collected by assessment against abutting property was essentially fixed on the basis of the cost of the improvement specified in an illegal contract between the city and the contractor for repaving the street. In order to determine what amount should be claimed as a lien on the property and for which execution could issue against it, resort must necessarily be had to the illegal contract.
No estoppel 'against the plaintiffs can arise on account of the fact that the pavement was completed before the filing of the petition, especially in view of the evidence, which shows that they filed their written protest against the construction of the work before it was started. 25 Am. & Eng. Enc. Law, 1206.
*445. 2. It was further .insisted that the assessments were illegal because made without giving plaintiffs notice or affording them a hearing on the reasonableness of the same, and amounted to taking their property without due process of law. The mode of enforcing the collection of assessments for paving streets is set forth in section twelve of the act of 1892 amending the charter of the City of Gainesville (Acts 1892, p. 168), as follows: “Be it further enacted, That the Mayor and Council of said city shall have power and authority to enforce the collection of the amount of any assessment so made for work done either upon the sidewalks or streets, by execution to be issued by the clerk of the council against the real estate so assessed, and against the owner thereof at the date of the ordinance making the assessment; also against any owner of abutting real estate for improvements on sidewalks; and also against any and all property, rights, and franchises of any street-railway company for any assessment for work so done either upon the sidewalks or streets, which execution may be levied by the marshal of said city on said real estate, or upon the property, rights, and "franchises of any street-railway company; and after advertising and other proceedings as is provided in cases of sales for city taxes, the same may be sold at public outcry to the highest bidder, and such sale shall vest absolute title in the purchaser; provided, that the defendant shall have the right to file an affidavit of illegality denying that he owes the whole or some part thereof of the sum for which execution was issued, and in case he owes any amount, stating what amount is due, which so admitted to be due shall be paid or collected before the affidavit is received, and the affidavit received for the balance, and all such affidavits so received shall be returned to the superior court of Hall'county and there be tried and the issue determined as in cases of illegality, subject to all the pains and penalties provided in cases of illegality for delay.” Properly construed, this portion of the charter refers to the enforcement of the cost of paving streets, alleys, etc., as well as to sidewalks. Provision is made for a remedy by illegality, by which a property owner is afforded a hearing as to the reasonableness or lawfulness of the assessment before he is .finally required to pay the assessment. Having such a remedy, the property of abutting landowners is not taken without due process of law. Shippen Brothers Lumber Co. v. Elliott, 134 Ga. 699 (68 S. E. 509).
*4463. It was urged on behalf of defendant that the right in each of the plaintiffs to file an affidavit of illegality furnished an ample remedy at law, and therefore that it was proper to refuse an injunction upon the application of all of them in one petition. It is true that each of the complainants might have filed an affidavit of illegality, and that the right to do so afforded to each due process of law, as has just been held. But the right of a number of people to proceed separately at law does not necessarily exclude their right to join in an equitable petition for the purpose of avoiding a multiplicity of suits or actions. In Regenstein v. City of Atlanta, 98 Ga. 167 (25 S. E. 428), several owners of property abutting upon a street, which had been improved, filed an equitable petition to enjoin the collection of assessments which had been made against-them or their property on account of the local improvement. They attacked the assessment as a whole, on .the ground that the city was without authority to renew the pavement. They also alleged defective performance of the work. As to these matters it will be seen that this court dealt with the application for injunction on its merits, holding, that, under the provisions of the charter of the City of Atlanta, the municipal authorities had power to renew worn-out pavements; that the municipal council had a discretion in determining whether a pavement was or was not worn out or no longer serviceable; and that the evidence introduced did not show that such discretion had been abused or arbitrarily used. It was also said that the allegation in regard to defective work was made by counter-affidavits. In addition to this, the complainants alleged that excessive amounts had been assessed against their property. As to this point it was said that affidavits of illegality would furnish them an ample remedy. In Mayor and Council of Gainesville v. Dean, 124 Ga. 750 (53 S. E. 183), two executions for assessments against two different parcels of land, belonging to the same person, had been issued on account of a street improvement, and a third execution had been issued against that person on account of the assessment, and a levy thereof was threatened. It was held, that as all of the executions were against the same person or his property, and involved the same questions, they could be consolidated and all tried together as one action at law, and therefore that a resort to equity was unnecessary.
In the case 'at bar a single street was paved and assessments *447were made against abutting property on account thereof. Several owners of lots abutting on the street joined in filing an equitable petition to enjoin the enforcement of such assessments by execution and sale. All of them attacked the validity of the entire assessment, on the ground -of lack of authority in the city to make it, and because the contract which the city had made with the contractors who laid the pavement was unlawful and furnished no valid basis for making assessments against abutting property.» Each of them had a common interest in this attack upon the validity of the entire assessment. If each of 'them had set it up separately by means of affidavit of illegality, the eases thus made could not have been consolidated and tried at law as one, but a number of different eases at law would have had to be tried separately, and in each the same question as to the validity of the whole assessment would have had to be determined. "Where owners of property abutting upon a street which is thus improved, and for the pavement of which an assessment against all abutting property is' made, de'sire. to join in one attack upon the validity of the entire assessment affecting the property of each, there is such a common bond between them in respect to such attack as to authorize them to join in an equitable petition for the purpose of enjoining the enforcement of the assessment and having it declared void in one proceeding, and thus to avoid a multiplicity of suits, which would arise from-requiring each of them to file an affidavit of illegality, and to be’ subjected to a separate trial. The facts of this case differentiate it from those in which it has been held by this court that the remedy at law was as adequate and complete as by an equitable proceeding.
What has been said disposes of the case and renders it unnecessary to deal with the contention as to the power of the City of Gaines-ville to repave a street under the act of 1892 (Acts 1892, p. 170), as amended by the act of 1903 (Acts 1903, p. 525), amending the charter of the City of Gainesville, or to refer to Civil Code § 870.
Judgment reversed.
All the Justices concur.