No abstract

Many factors  influence developers to determine proce of a house unit of housing. There are some additional costs must be considered for accomplishing projects which not directly related to the cost of a house units. These costs are needed to provide basic and supporting facilities, utilities and some other project overheads are then borne to prospective customers. This study observed the influence of those costs to the cost of building units of luxury housing in Yogyakarta. The survey was conducted to find the cost components from two luxury housing projects. The data was obtained through interviewing field supervisors and heads of engineering which consisted of the costs for developing public and residental facilities, expensing projects overhead, land acquition and house construction. The results showsed that in average, cost of facilities, infrastructure, utilities and project overhead of both housing affect about 29,9% of the total, it also shows that land acquittion for road construction became the highest influenced cost. Keywords: basic facilities, effect,overhead, supporting facilities, utilities  ABSTRAK Banyak faktor mempengaruhi pengembang perumahan dalam menentukan harga tiap unit rumah. Selain biaya dasar unit rumah, terdapat beberapa biaya tambahan yang tidak langsung berhubungan dengan biaya pembangunan unit rumah seperti, biaya bahan, alat dan tenaga kerja namun harus dipersiapkan untuk mendukung pelaksanaannya. Biaya-biaya tersebut seperti biaya untuk pemenuhan keberadaan prasarana, sarana, utilitas dan overhead yang pada umumnya kemudian dibebankan kepada pelanggan yang membeli setiap unit rumah. Studi ini membahas pengaruh keberadaan biaya-biaya tambahan tersebut terhadap biaya produksi unit bangunan pada perumahan mewah di Yogyakarta. Survei dilakukan pada dua perumahan mewah di Yogyakarta. data diperoleh melalui wawancara dengan supervisor lapangan dan kepala teknik yang berupa biaya pengembangan fasilitas umum dan fasilitas sosial perumahan, overhead, pengadaan lahan dan biaya bangunan. Hasil penelitian menunjukkan bahwa secara rata-rata pembiayaan fasilitas, infrastruktur, utilitas dan overhead terhadap biaya unit bangunan pada kedua perumahan berpengaruh sebesar 29,9% dari total biaya yang diperlukan, dimana biaya pengadaan tanah untuk prasarana jalan menyumbangkan kontribusi terbesar dalam pembiaayaan tersebut. Kata kunci: biaya, pengaruh, perumahan, overhead

Construction business is still considered as a prominent business in the entire cities in Indonesia, including Yogyakarta. Contractors compete to get project either by tender or direct order. Both methods will certainly affect the price offered by the contractors. The research aims to understand how big the price gap between tender method and direct order for architectural works along with the work quality and the owner’s satisfaction. Furthermore, several buildings in Yogyakarta become the sample of this research. The research data were collected using questionnaire, direct assessment, as well as direct interview with the contractors. The data obtained were analysed descriptively and statistically using SPSS software. The price gap between tender and direct order is 0,42% more expensive tender. On the tender method, the unit price increases followed by the increase in quality and user satisfaction. On direct order work, the price increase is followed by the increase in quality but decreased satisfaction.

The economic evaluation of the Interurban Bridge Management System (IBMS) aims to determine the priority of bridge handling. One of the calculations required in NPV and IRR calculations used in priority handling is the cost of replacing the bridge. Over time, the IBMS system must be constantly updated to continue to use in accordance with current circumstances and use new, better methods. This study uses Life-Cycle Cost (LCC) method as an alternative method to calculate the replacement cost of 5 bridges in D.I. Yogyakarta in 2012. The IBMS method produces a priority sequence of bridge handling with Bogo bridge, Suru bridge, Winongo bridge, Kalasan B bridge and Duren bridge in sequence. The LCC method produces a priority sequence of bridge handling with Bogo bridge, Winongo bridge, Suru bridge, Kalasan B bridge and Duren bridge. A. The average initial cost of bridge replacement using both methods is 23.012%. The value earned using the Life-Cycle Cost method is always greater due to the addition of inspection fees, maintenance costs, and bridge damage costs.