Background
7In August 2002, the Insurer was one of three insurers authorised to provide home building warranty insurance in New South Wales. Prior to 2001, Avcon had undertaken only a very modest amount of residential building work.
8In 2001, Avcon wished to undertake further residential building work. In order to do so, it had to comply with s 92(1)(a) of the Home Building Act 1989 (NSW) (HB Act). Section 92(1) prohibited a person from doing residential building work under a contract unless a contract of insurance complying with the HB Act was in force in relation to that work. The contract of insurance was required to be in the name of the person who contracted to do the work and a certificate of insurance had to be provided to the other party to the contract.
9Section 99 of the HB Act set out the requirements for insurance for residential building work. Section 99(1) provided as follows:
"A contract of insurance in relation to residential building work required by section 92 must insure:
(a) a person on whose behalf the work is being done against the risk of loss resulting from non-completion of the work because of the insolvency, death or disappearance of the contractor, and
(b) a person on whose behalf the work is being done and the person's successors in title against the risk of being unable, because of the insolvency, death or disappearance of the contractor:
(i) to recover compensation from the contractor for a breach of a statutory warranty in respect of the work, or
(ii) to have the contractor rectify any such breach."
The statutory warranties as to residential work were specified in s 18B of the HB Act, but is unnecessary to reproduce them.
10In October 2001, the Insurer's agent, Dexta, notified Avcon that it was eligible to apply for "Job Specific" home building warranty insurance for one job, with a financial limit of $130,000. Prior to receiving that notification, the appellants, presumably at Dexta's request, had executed a Deed of Indemnity in favour of Dexta (First Deed of Indemnity).
11On or about 6 August 2002, Avcon sought to increase its eligibility with Dexta for "Job Specific" home building warranty insurance from $130,000 to $1,400,000. The requested increase was to enable Avcon to undertake the development of seven town houses to be located on a property in Sylvania (Property).
12On 30 August 2002, Dexta provisionally accepted Avcon's application, subject to compliance with certain conditions.
13On 3 December 2002, each of the appellants executed the Deed of Indemnity in favour of Dexta. The Deed of Indemnity was in the same terms as the First Deed of Indemnity.
14The Deed of Indemnity relevantly provided as follows:
"2. The Indemnifier unconditionally and absolutely agrees to indemnify and keep indemnified the Insurer for all loss, damage, costs, charges or other liabilities incurred or paid as a result of any claim arising under the Policy and all amounts which the Insurer must pay and is liable to or may become liable to pay under the said policy (whether or not the Insurer has paid any amount) in all cases, whether or not the claim arises or is made before or after the date of this deed PROVIDED ALWAYS that the amount of such indemnity shall be no greater than $200,000 per claim.
3. ...
(c) On receiving a demand from Dexta or the Insurer, the Indemnifier will pay to Dexta all of the monies so demanded forthwith, together with interest at the rate of Ten per cent (10%) per annum from the date of such demand, all losses, damages, costs, charges, fees expenses or other liabilities borne by the Insurer, whatsoever incurred by the Insurer, which shall become due and payable on receipt of such demand".
15The expression "Indemnifier" was defined to mean each of the appellants. The term "Policy" was defined to mean "any policy or certificate of insurance from time to time issued by Dexta at the request of the Contractor [Avcon]".
16It appears that Avcon subsequently requested insurance coverage for work to a total value of $2,400,000. On 11 December 2002, Dexta quoted Avcon a premium of $20,839 for insurance policies covering work of that value. Avcon duly paid the premium, subject to a minor adjustment resulting from the estimated cost of the project being revised down.
17On 12 December 2002, Dexta issued seven separate certificates of insurance under the HB Act. Each certificate related to one of the seven separate individual lots in the strata scheme for the Property. Each certificate stated that a contract of insurance complying with s 92 of the HB Act had been issued by the Insurer.
18The terms of each of the Policies (that is, the contracts of insurance) were identical and included the following provisions:
"1 The Insurer will indemnify the Building Owner for loss or damage in respect of residential building work:
1.1 which results from non-completion of the work because of the insolvency, death or disappearance of the Contractor;
1.2 arising from breach of a statutory warranty and which either the Contractor is unable to rectify, or the Building Owner is unable to recover compensation from the Contractor, because of the insolvency, death or disappearance of, the Contractor.
...
6.1 The aggregate liability of the Insurer shall not exceed Two Hundred Thousand Dollars ($200,000.00) for all claims in respect of a dwelling, or such other amount as may be prescribed from time to time by the Act and the Regulation.
...
6.4 The aggregate liability of the Insurer in respect of a dwelling in a building or complex containing more than one dwelling shall be reduced by an amount calculated by dividing the amount of any claim paid by the Insurer in relation to the common property of the building or complex by the number of dwellings contained in the building or complex."
19The Policy defined "Building Owner" to mean:
"the person for whom residential building work is being or is about to be carried out under a contract ... and any person who is a successor in title for the time being of the land or building in respect of which the work was carried out under the contract..."
A "claim" was defined to mean "a claim by the Building Owner under this policy", while the term "dwelling" was defined to include common property.
20Avcon proceeded to build seven residential dwellings on the Property. The building of course incorporated common property. Certifiers issued a final occupation certificate on 10 March 2004.
21Avcon sold Lots 1 to 7 of the Property to individual purchasers who became registered as proprietors of their respective lots. Lot 7 was apparently transferred to a subsequent purchaser.
22In August 2007, Avcon was placed in voluntary administration. It subsequently executed a deed of company arrangement. The external administration of Avcon came to an end in September 2008.
23In the meantime, on about 19 November 2007, the Insurer received a claim form from Owners Corporation SP 72145 (Owners Corporation), which had come into existence by reason of the registration of the strata scheme in respect of the Property. The claim form attached a report from a building consultant which detailed defects in the construction of the common property.
24On 15 January 2008, the Insurer received a claim form from each of the proprietors of the seven lots in the strata scheme. Each claim specified defects in the construction of the relevant lot, but included defects in the common property which directly affected the proprietor's enjoyment of the particular lot.
25The Insurer accepted some claims but rejected others. The Owners Corporation commenced proceedings against the Insurer in April 2008 in the Home Building Division of the Consumer, Credit and Tenancy Tribunal. The individual lot proprietors subsequently commenced their own proceedings against the Insurer in the Tribunal. The Tribunal proceedings were subsequently transferred to the Supreme Court Technology and Construction List.
26The Owners Corporation and the lot proprietors pleaded their case in an Amended List Statement, to which the Insurer responded. The parties filed expert reports prepared by building consultants. Ultimately the experts reached a consensus on the defects which had been detailed in the Amended List Statement.
27On 23 December 2009, the Insurer entered into terms of settlement with the Owners Corporation and all lot proprietors in respect of urgent works required to rectify defects in Lot 1 (First Terms of Settlement). In compliance with the First Terms of Settlement, the Insurer paid approximately $102,000 to a builder for repairs to Lot 1.
28On or about 14 January 2010, the parties to the Supreme Court proceedings attended a mediation. This resulted in terms of settlement (Second Terms of Settlement), by which the Insurer agreed to pay the "Owners" $1.1 million in full settlement of their remaining claims. The Second Terms of Settlement defined "Owners" to mean the Owners Corporation and the proprietors of all seven lots. The Insurer duly paid the settlement sum.
29On 4 February 2010, the Insurer issued letters of demand to Mr and Mrs Vitale seeking to recover $1,352,251.82 pursuant to the Deed of Indemnity. The sum claimed included legal costs incurred by the Insurer in defending the legal proceedings instituted by the Owners Corporation and the lot proprietors.