Combined synopsis and solicitation procedures cannot be used for a construction requirements. The applicable FAR references are provided below. Combined synopsis and solicitation procedures are used for commercial acquisitions only. See FAR Part 5 and Part 12 reference below.
In addition, the definition of construction states the requirements are "real property" and the definition of a commercial items states it is any item other than "real property". Therefore, construction requirements are excluded from using combined synopsis and solicitation procedures.
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“Commercial item” means --(1) Any item, other than real property, that is of a type customarily used by the general public or by non-governmental entities for purposes other than governmental purposes, and--
"Construction” means construction, alteration, or repair (including dredging, excavating, and painting) of buildings, structures, or other real property.
FAR 5.203 -- Publicizing and Response Time.
Whenever agencies are required to publicize notice of proposed contract actions under 5.201, they must proceed as follows:
(a) An agency must transmit a notice of proposed contract action to the GPE (see 5.201). All publicizing and response times are calculated based on the date of publication. The publication date is the date the notice appears on the GPE. The notice must be published at least 15 days before issuance of a solicitation, or a proposed contract action the Government intends to solicit and negotiate with only one source under the authority of 6.302, except that, for acquisitions of commercial items, the contracting officer may—
(1) Establish a shorter period for issuance of the solicitation; or
(2) Use the combined synopsis and solicitation procedure (see 12.603).
FAR 12.603 -- Streamlined Solicitation for Commercial Items.
(a) When a written solicitation will be issued, the contracting officer may use the following procedure to reduce the time required to solicit and award contracts for the acquisition of commercial items. This procedure combines the synopsis required by 5.203 and the issuance of the solicitation into a single document.
(b) When using the combined synopsis/solicitation procedure, the SF 1449 is not used for issuing the solicitation.