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Crosspointe Church Tenant Improvements

Adaptive re-use of an existing flex/R&D building into the new Crosspointe Church, Anaheim. The expanded Church will seat 800-1000 people and include a secure children’s space/indoor play area, a media resource center & bookstore, large gathering spaces, a new spacious lobby, elevator, new administrative spaces and a new seniors class space.

Square Footage


44,821 s.f.

Laguna Woods Clubhouse 2 Renovation

The Laguna Woods Village is a retirement community located in Southern California. This project is a 12,500 s.f. renovation of an existing historical building that includes new construction of a storage building, a loggia structure and adjacent site improvements.

The scope of work includes restoring of the original terra cotta tiles on the exterior of the building, updating & refurbishing the clubhouse & ballroom trusses, doors & windows, installation of new ceramic tiles throughout the restroom & kitchen, updates to the ceiling fans & chandeliers and restoration & upgrades to the roof structure & tiles.

The project involved coordination with the surrounding Laguna Woods Village Community to maintain a secure construction site while still allowing access to posterior golf cart paths, thus reducing the impact of construction on the local community.

Square Footage


12,500 s.f.

Commerce Casino

This project consisted of numerous tenant improvements including an elevator modernization, staircase repair, and renovation of an existing casino floor space into a High Stakes VIP Gaming Room and River Bar. The project included high-end finishes, custom millwork, doors, lighting, wall coverings, flooring, bar top and back bar. All was constructed while the casino was still in operation.

Sunstone at Juniper Springs

The project was to construct a high-end, three-story resort/condominium complex with subterranean parking. The resort included 77 suites ranging in size from 750 s.f. to 1,000 s.f. The complex featured a pool and spa, ski-in/ski-out terrace, Rustic Mountain Hearth Room with fireplace and adjoining view terrace, owner’s ski equipment lockers, exercise room, meeting rooms, underground parking and ski-in/ski-out access to ski lifts at the base of Mammoth Mountain Ski Area.

Square Footage


107,274 s.f.

Juniper Springs Lodge

175-unit three-story building condominium complex with two-story subterranean parking structure. Also included: exercise room, swimming pool, locker rooms and café. Extensive exterior architectural enhancements. Oltmans worked closely with Callison Architects of Seattle, Washington during the design phase, providing value engineering and constructability review. Oltmans’ team provided design / build services for the mechanical, electrical, plumbing and fire sprinkler scope of work, as well as full general contracting services for project. The site is located in the Sierra Mountains near the Mammoth Ski Resort area. A significant portion of the construction operations were completed during the winter months with up to twenty feet of snow. Temporary protection and precise sequencing were necessary to meet the construction schedule deadline during the inclement weather conditions. The soil conditions included heavy rock and boulders which required blasting to remove them and subsequent de-watering operations with a storm water recovery system. The site is adjacent to the Valentine Timber Reserve, as well as the local water supply, Mammoth Creek. The close proximity to these two sensitive areas required significant water runoff mitigation and quality control systems to be put in place and closely monitored. The project challenges were successfully managed with pre-construction planning and teamwork with our subcontractors. The Client was very satisfied with the quality of the project completed on time and budget.

Square Footage

155,000 s.f. Building area

68,780 s.f. Parking area

Hilton Hotel

Hilton Hotel

Complete facelift of building exterior; including removal and replacement of exterior window system. Also, interior work done to enclose an area to become a ‘solarium’ to hold the gym equipment.

Special Features

Project was completed while hotel remained fully operational.

Square Footage

100,000 s.f.

Village of Hope

Village of Hope

This Design-Build project was part of a base closure project at the Tustin Marine Base. Once a Military Barracks Facility, the project consisted of converting housing for occupancy by homeless families and building new structures for dining and classrooms. The Village of Hope is a nationally recognized residential facility for homeless men, women and children. It is the most comprehensive facility of its kind in Orange County, California and serves as a national role model for the re-purposed use of closed military bases. Located on five acres of the former Marine Corps Air Base in Tustin, this complex consists of 150,000 s.f. of living and learning space.

The Village of Hope offers tastefully appointed residential suites cleverly converted from their original military barracks into housing with an overall capacity of shelter for 192 needy residents. This multi-function center also provides fully-licensed medical and dental clinics, a child development center, oversized dining facilities, a 290-seat chapel and auditorium as well as a variety of other vocational and counseling classrooms. Oltmans Construction Co.’s scope of work included, but was not limited to the following: Construction of the spectacular new chapel and dining facility, all related site work required by the project, the addition of elevators in existing buildings, and conversion of the military barracks into residential suites. In addition, significant structural and utility modifications were required and made to the medical offices, classrooms and training facilities.In addition, Oltmans Construction Co. coordinated and managed all donated materials and services for this project. Self performed work also included concrete, light carpentry, framing, seismic, structural retrofit, demolition, materials waste management, and site housekeeping.

Square Footage

80,000 s.f. Renovation & 40,000 s.f. New Construction

Phi Delta Theta Fraternity House

This project was a major renovation and restoration of the historic Phi Delta Theta Fraternity House, originally built in the late 1800’s in Los Angeles, California. The project was a complete reconstruction of the entire house including, but not limited to, the following: extensive concrete work performed to raise a remaining portion of the previously fire-damaged structure accommodating new foundations; existing basement was enlarged to accommodate the placement of new HVAC units. All new electrical, plumbing, and HVAC systems were installed throughout. Renovation included infrastructure and all exterior flatwork including new handicap access ramp and addition of outside patio areas.

Further, the entire house structure was completely reframed to accommodate seventeen (17) new bedrooms, a music room, a library, and six (6) bathrooms. Upgrades included a new full-service commercial kitchen, a complete restoration of the existing Chapter Round Room to its original condition with the addition of custom lighting; new custom wood windows to match replaced original divided light windows. The exterior of the house was finished with new stucco, new perimeter custom fencing, and was complete with landscaping.

This successful project renovation resulted in a first class-quality historic home restoration.

Square Footage

10,000 s.f.

Mariners Church

Winner of “Best of” in the Worship Category from California Construction Magazine.

The Mariner’s Church’s master-planned project was developed in a series of phases. Approximately 80% of the site has been improved or newly constructed from vacant land. The project included the expansion of campus facilities from two existing buildings to seven major buildings plus parking structures and new outdoor facilities and playspace.

The original campus design and first stages of construction started in 1998. Oltmans was brought on board in 2004 to assist with planning and constructing Imagine 3, the third phase of the masterplanned campus, which included the site and lake work, the Youth Building and Port Mariners Kids Building. The new chapel was under construction concurrently with our phase of work and required collaborating with the other on- site general and subcontractors. Oltmans coordinated all site logistics for an effective construction operation. In addition to general contracting, Oltmans provided design/build services for the mechanical, electrical, plumbing and fire sprinkler systems. We worked closely with the lead design team, which included the lead campus designer, the lead architect for all vertical construction and the specialized chapel designer.

The two-story steel framed Youth Building included large multi-purpose rooms with state-of-the-art sound, video and lighting for the performing arts stage. Recreational areas included meeting rooms with roll-up doors to connect with the youth plaza outside, lounges for high school age youth furnished with pool tables, table top games and other equipment for interactive recreation. There was a 2-level basketball court structure as well as a large skateboard/bike park located outdoors in the student plaza. The studio space was designed for students to listen to music, record music or practice for upcoming performances. Class room and office space was also included.

The two-story, 72,162 s.f. Port Mariners Kids Building was a tilt-up concrete structure with a stone veneer, glass and aluminum façade. The project included class rooms, central plant building with mezzanine as well as Wacky World Studios props and decorations as well as a custom themed play ground.

The site and artificial lake scope of work included a 3-acre man-made lake with a concrete bottom. The lake area included waterfalls, bridges, trellis structures and decorative concrete. One side of the lake wraps around a barbecue island for outdoor events. The campus site setting was designed to accommodate special occasions, including weddings and other gatherings. The lake design created a protective type moat, separating this area from other activities and crowds.

Square Footage

Port Mariners 72,162 s.f.

Youth Building 27,000 s.f.

Site Work/Lake 3-acres

Herzog Winery

A unique stone and steel entrance and housed a massive 21,780 s.f. wine cellar with a 35,453 s.f. bottling area, a 5,100 s.f. tasting / retail room and a beautiful restaurant complete with a full kitchen. Several windows along the mezzanine level allowed visitors the opportunity to actually view the wine-making process. The Herzog project also included a 24,418 s.f. warehouse with a 4,000 s.f. exterior equipment yard where the heating and refrigeration units necessary for their operation were placed. The warehouse area included dockhigh and grade-level trucking options with convenient in-ground scales.

Square Footage


71,000 s.f.