{"id":43814,"date":"2025-07-04T11:47:06","date_gmt":"2025-07-04T09:47:06","guid":{"rendered":"https:\/\/biblus.accasoftware.com\/en\/?p=43814"},"modified":"2025-07-04T11:47:08","modified_gmt":"2025-07-04T09:47:08","slug":"electrical-takeoff-common-systems-for-cost-estimation","status":"publish","type":"post","link":"https:\/\/biblus.accasoftware.com\/en\/electrical-takeoff-common-systems-for-cost-estimation\/","title":{"rendered":"Electrical Takeoff: Common Systems for Cost Estimation"},"content":{"rendered":"<p class=\"sommario\">How to do it and what are the simplest and most reliable methods for processing the electrical takeoff of an electrical system<\/p>\n<p><!--more--><\/p>\n<p>In a renovation, creating the electrical takeoff of the electrical system is always a tricky step. It is never precisely clear how to proceed and what criteria to follow to obtain an appropriate estimate. Evaluating the cost of the system based on the number of light points is certainly the most common method, but there are also quicker alternatives, suitable in the early stages of design, when a detailed project is not yet available.<\/p>\n<p>In this article, we&#8217;ll be covering the various methods and highlight the advantages of using a specific <a class=\"textualLink_primus\" href=\"https:\/\/www.accasoftware.com\/en\/cost-estimating-software\" target=\"_blank\" rel=\"noopener\">software for cost estimating<\/a>.<\/p>\n<div id=\"attachment_43457\" style=\"width: 809px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" aria-describedby=\"caption-attachment-43457\" class=\"wp-image-43457 size-full lazyload\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/biblus.accasoftware.com\/en\/wp-content\/uploads\/sites\/2\/2025\/06\/Metric-computation-Superbonus.jpg\" alt=\"Metric computation with PriMus\" width=\"799\" height=\"449\" \/><p id=\"caption-attachment-43457\" class=\"wp-caption-text\"><noscript><img decoding=\"async\" class=\"wp-image-43457 size-full lazyload\" src=\"https:\/\/biblus.accasoftware.com\/en\/wp-content\/uploads\/sites\/2\/2025\/06\/Metric-computation-Superbonus.jpg\" alt=\"Metric computation with PriMus\" width=\"799\" height=\"449\" \/><\/noscript> Electrical takeoff created with PriMus<\/p><\/div>\n<h2 id=\"light-point-method-for-estimating-an-electrical-system\">Light Point Method for Estimating an Electrical System<\/h2>\n<p>The most commonly used method for estimating the renovation of the electrical system for residential buildings is certainly to evaluate it based on the <strong>number of light points<\/strong> to be created.<\/p>\n<p>A light point refers to any point in the house where electrical energy is supplied. A light point, for example, can be an electrical outlet, a switch, an emergency lamp, a spotlight, a TV socket, a Schuko socket for appliances, etc.<\/p>\n<p>Below is an example of the light points typically present in the electrical system of a common household:<\/p>\n<ul>\n<li>standard 220 V light point<\/li>\n<li>control point with switch<\/li>\n<li>control point with switch<\/li>\n<li>control point with relay<\/li>\n<li>dimming point (dimmer)<\/li>\n<li>relay control actuator point<\/li>\n<li>two-phase 10\/16A power socket point<\/li>\n<li>additional 10\/16 A socket in the same box<\/li>\n<li>universal socket point<\/li>\n<li>TV socket point<\/li>\n<li>telephone or data network socket point<\/li>\n<li>light point for emergency lamp<\/li>\n<li>intercom connection point<\/li>\n<li>power supply point for electric shutters<\/li>\n<li>boiler power supply point<\/li>\n<li>thermostat control point<\/li>\n<li>alarm system preparation point.<\/li>\n<\/ul>\n<p>The number of light points for each of these types is determined based on the project specifications. The designer usually indicates on the plan, with appropriate symbols accompanied by a legend, the positioning of light points, socket points, etc. In the design phase, it is essential to consider the position of large appliances (washing machine, dishwasher, hood, fridge, induction cooktop, etc.), furniture, and user needs.<\/p>\n<p>The cost of a light point varies based on the pricing used and the type of light point\/socket.<\/p>\n<p>The cost already includes all the necessary work for the realization of a compliant electrical system, including materials (conduits, electrical wires, junction boxes, etc.), except for the plates and final finishes.<\/p>\n<p>Of course, to have a complete assessment, the cost of the light point must be added to the price of the electrical panel, any masonry work for opening and closing the channels, the removal of any existing systems and equipment, etc.<\/p>\n<p>To prepare a bill of quantities professionally and avoid errors, it is advisable to use a specific <a class=\"textualLink_primus\" href=\"https:\/\/www.accasoftware.com\/en\/cost-estimating-software\" target=\"_blank\" rel=\"noopener\">software for bill of quantities and work accounting<\/a> that allows you to consider specific data and costs of the installation sector (materials, accessories, transport, labor, installation times, etc.) to define each item in the price list.<\/p>\n<p>Specific functions allow you to change or replace components to obtain final prices or estimates and compare materials from different suppliers. Additionally, you can update the bill of quantities, price list, economic framework, and accounting easily and dynamically.<\/p>\n<h2 id=\"calculation-of-the-bill-of-quantities-based-on-the-surface-area-of-the-house\">Calculation of the Bill of Quantities Based on the Surface Area of the House<\/h2>\n<p>During the feasibility study phase, when the project of the systems is not yet specifically defined, the cost of the electrical system can be determined by making a rough estimate based on the surface area of the house, expressed in square meters.<\/p>\n<h3>Estimation of Light Points Based on Square Meters<\/h3>\n<p>Generally, in a basic dwelling, the number of light points can be approximated to 1 for every 2\/3 m<sup>2<\/sup>. With this logic, to make the <strong>bill of quantities for the electrical system of a<\/strong> <strong>100 m<sup>2<\/sup> apartment<\/strong>, at least 35\/50 light points should be considered. This number is likely to increase if the agreements between the designer and clients foresee the realization of a standard or home automation system (where the control of devices and appliances occurs remotely, even in real-time).<\/p>\n<p>This assessment, although rough, helps to have an order of magnitude of the amount to be spent and must then be detailed based on the progress of the project.<\/p>\n<h3>Difference Between Basic, Standard, and Home Automation Systems<\/h3>\n<p>Even in the feasibility study phase, it is advisable, however, to establish in agreement with the client whether the project system will be of:<\/p>\n<h4>Basic Level<\/h4>\n<p>The basic level represents the minimum configuration for a compliant electrical system. It is designed to ensure safety and essential functionality. The main characteristics include:<\/p>\n<ul>\n<li><strong>minimum distribution<\/strong> &#8211; a minimum number of sockets and light points, determined based on the area and type of each room;<\/li>\n<li><strong>essential circuits<\/strong> &#8211; a minimum number of circuits, adequate for the surface area of the house;<\/li>\n<li><strong>differential protection<\/strong> &#8211; at least two differential switches to ensure the safety of the system.<\/li>\n<\/ul>\n<p>This level is mandatory and it is not possible to go below it.<\/p>\n<h4>Standard Level<\/h4>\n<p>The standard level is designed for those who want a system with greater safety and comfort. In addition to the features of the basic level, it includes:<\/p>\n<ul>\n<li><strong>load control<\/strong> &#8211; installation of a system to optimize the use of electrical energy and reduce waste;<\/li>\n<li><strong>advanced security<\/strong> &#8211; integration of video intercoms and intrusion detection systems for greater protection of the home;<\/li>\n<li><strong>expanded equipment<\/strong> &#8211; increase in the number of sockets, light points, and differential switches compared to the basic level.<\/li>\n<\/ul>\n<p>This level offers a balance between advanced functionality and contained costs.<\/p>\n<h4>Home Automation Level<\/h4>\n<p>The home automation level represents the technological evolution of the electrical system. It is ideal for those who want a smart and highly automated home. The main characteristics include:<\/p>\n<ul>\n<li><strong>integrated home automation functions<\/strong> with management of at least four functions among the following &#8211; load control, light management, temperature control, scenario management, remote control, sound diffusion, fire detection, flood prevention, gas detection, video surveillance, access management, automatic irrigation, energy monitoring, electric vehicle charging, controlled mechanical ventilation;<\/li>\n<li><strong>system integration<\/strong> &#8211; the various functions must be interconnected and managed by a central control unit, allowing for synergistic interaction between devices;<\/li>\n<li><strong>remote control<\/strong> &#8211; the ability to monitor and manage the system remotely via smartphone or tablet.<\/li>\n<\/ul>\n<p>This level offers the maximum in terms of comfort, energy efficiency, and safety.<\/p>\n<div id=\"attachment_34529\" style=\"width: 810px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" aria-describedby=\"caption-attachment-34529\" class=\"size-full wp-image-34529 lazyload\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/biblus.accasoftware.com\/en\/wp-content\/uploads\/sites\/2\/2025\/06\/Performance-levels.jpg\" alt=\"Performance levels\" width=\"800\" height=\"600\" \/><p id=\"caption-attachment-34529\" class=\"wp-caption-text\"><noscript><img decoding=\"async\" class=\"size-full wp-image-34529 lazyload\" src=\"https:\/\/biblus.accasoftware.com\/en\/wp-content\/uploads\/sites\/2\/2025\/06\/Performance-levels.jpg\" alt=\"Performance levels\" width=\"800\" height=\"600\" \/><\/noscript> Performance levels<\/p><\/div>\n<p>Based on the chosen level, it will be possible to proceed with identifying the number of light points in relation to the surface area of the rooms (as shown in the table). When calculating the light points, do not forget the <strong>external lighting<\/strong> related to gardens, as well as balconies, courtyards, and terraces.<\/p>\n<p>Once the number of light points has been identified, as in the previous case, it will be necessary to proceed by multiplying the number of light points by the corresponding price. In this regard, it is always useful to use software that also guarantees the use of <strong>official and always updated price lists<\/strong>, or to conduct precise analyses of <strong>new prices<\/strong>.<\/p>\n<h2 id=\"flat-rate-and-measurement-method-for-electrical-takeoff\">Flat Rate and Measurement Method for Electrical Takeoff<\/h2>\n<p>In the electrical takeoff, it is essential to choose the most suitable estimation method for the type of intervention: flat rate or measurement. The &#8220;flat rate&#8221; method consists of determining a lump sum price for the entire system, based on a global assessment of the work to be performed and the necessary resources. In contrast, the &#8220;measurement&#8221; method involves a detailed calculation of costs based on the actual quantities of materials and work.<\/p>\n<h3>Which method to choose: flat rate or measurement?<\/h3>\n<p>Now let&#8217;s take a closer look at the aspects that characterize flat rate and measurement price estimates:<\/p>\n<ul>\n<li><strong>flat rate<\/strong> &#8211; when estimating the overall cost of the work based on a direct assessment of the activities and resources needed to execute the project without precisely calculating all quantities. This approach is particularly useful when the work is varied, complex, and not easily divisible into standard measurement units. This type of estimate is often used for the evaluation of the electrical system, reasoning by analogy with similar projects or relying on the experience of professionals and installers;<\/li>\n<li><strong>measurement<\/strong> &#8211; based on the use of standard measurement units (such as square meters, linear meters, etc.) to estimate costs. A unit cost is assigned to each measurement unit, which is then multiplied by the actual quantity required in the project. This approach is more suitable when the work can be divided into standardized measurement units and when it is possible to estimate costs based on these measurements.<\/li>\n<\/ul>\n<p>In both cases, the <strong>indicated amount includes all finishes and work necessary to deliver the functioning systems<\/strong> in every part and made to a high standard.<\/p>\n<h2 id=\"faq-on-the-electrical-takeoff\">FAQ on the Electrical Takeoff<\/h2>\n<h3>How is the cost of an electrical system calculated in a renovation?<\/h3>\n<p>The most common method is that of light points: the number of light points is multiplied by a unit price indicated by the price list. Alternatively, in the early design phases, it is possible to estimate the cost based on the surface area of the dwelling.<\/p>\n<h3>What is meant by a light point in an electrical system?<\/h3>\n<p>A light point is any point where electrical energy is supplied, such as sockets, switches, lamps, TV sockets, telephone sockets, roller shutter controls, thermostats, etc.<\/p>\n<h3>What is the average cost of a light point?<\/h3>\n<p>The cost of a light point varies from 15 to 70 euros, depending on the type and the price list used. This price includes materials and labor, but not finishes such as plates.<\/p>\n<h3>What is the difference between a basic, standard, and home automation electrical system?<\/h3>\n<p>The basic level guarantees essential functionalities, the standard includes greater equipment and safety, while the home automation system integrates automated functions and remote control for advanced comfort.<\/p>\n<h3>What does it mean to do a takeoff by flat rate or measurement?<\/h3>\n<p>The flat rate takeoff provides a lump sum price for the entire system, while the measurement takeoff calculates costs based on the actual quantities of materials and work with unit prices.<\/p>\n<h3>When is it advisable to use the flat rate method and when the measurement method?<\/h3>\n<p>The flat rate method is ideal for complex or poorly detailed interventions, while the measurement method is indicated when the project is defined and divisible into standard units.<\/p>\n<h3>What is the advantage of using software for the electrical takeoff?<\/h3>\n<p>Software allows for professional management of the takeoff, considering updated costs, installation times, materials, and accessories. It also allows for comparisons between suppliers and automatic updates of the takeoff.<\/p>\n<h3>How to estimate the number of light points in the preliminary phase?<\/h3>\n<p>In the study phase, one can estimate 1 light point for every 2-3 m\u00b2. For example, in a 100 m\u00b2 apartment, one can consider 35-50 light points, depending on the type of system planned.<\/p>\n<p>&nbsp;<\/p>\n<div class=\"international-product-banner-desktop\" style=\"text-align: center;\"><a class=\"product-banner-link\" href=\"https:\/\/www.accasoftware.com\/en\/cost-estimating-software\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" class=\"lazyload\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"\/wp-content\/themes\/enfold-child\/img\/banner_prodotto\/primus-en.jpg\" alt=\"primus\" \/><noscript><img decoding=\"async\" class=\"lazyload\" src=\"\/wp-content\/themes\/enfold-child\/img\/banner_prodotto\/primus-en.jpg\" alt=\"primus\" \/><\/noscript><\/a><\/div>\n<div class=\"international-product-banner-mobile\" style=\"text-align: center;\"><a class=\"product-banner-link\" href=\"https:\/\/www.accasoftware.com\/en\/cost-estimating-software\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" class=\"lazyload\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"\/wp-content\/themes\/enfold-child\/img\/banner_prodotto_mobile\/primus-en.jpg\" alt=\"primus\" \/><noscript><img decoding=\"async\" class=\"lazyload\" src=\"\/wp-content\/themes\/enfold-child\/img\/banner_prodotto_mobile\/primus-en.jpg\" alt=\"primus\" \/><\/noscript><\/a><\/div>\n","protected":false},"excerpt":{"rendered":"<p>How to do it and what are the simplest and most reliable methods for processing the electrical takeoff of an electrical system<\/p>\n","protected":false},"author":54,"featured_media":43818,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_data_scadenza_evento":"","_evento_nome":"","_evento_data":"","_evento_luogo":"","_evento_cta":"","keyword_en":"electrical takeoff","keyword_es":"","keyword_fr":"","keyword_de":"","keyword_ptb":"","_note_content":"<table dir=\"ltr\" border=\"1\" cellspacing=\"0\" cellpadding=\"0\" data-sheets-root=\"1\" data-sheets-baot=\"1\"><colgroup><col width=\"29\" \/><col width=\"353\" \/><col width=\"362\" \/><\/colgroup>\r\n<tbody>\r\n<tr>\r\n<td>EN<\/td>\r\n<td>electrical takeoff<\/td>\r\n<td>90<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>EN<\/td>\r\n<td>electrical quantity takeoff<\/td>\r\n<td>20<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>EN<\/td>\r\n<td>electrical takeoffs<\/td>\r\n<td>10<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>EN<\/td>\r\n<td>takeoff electrical projects<\/td>\r\n<td>10<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>FR<\/td>\r\n<td>devis d'installation \u00e9lectrique<\/td>\r\n<td>20<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>FR<\/td>\r\n<td>devis installation \u00e9lectrique<\/td>\r\n<td>20<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>FR<\/td>\r\n<td>devis installation \u00e9lectrique maison<\/td>\r\n<td>20<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>FR<\/td>\r\n<td>comment faire un devis pour une installation \u00e9lectrique<\/td>\r\n<td>0<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>FR<\/td>\r\n<td>devie pour installation \u00e9lectrique<\/td>\r\n<td>0<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>FR<\/td>\r\n<td>devis d installation \u00e9lectrique<\/td>\r\n<td>0<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>PTB<\/td>\r\n<td>or\u00e7amento de instala\u00e7\u00e3o el\u00e9trica residencial<\/td>\r\n<td>20<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>PTB<\/td>\r\n<td>or\u00e7amento instala\u00e7\u00f5es el\u00e9tricas<\/td>\r\n<td>20<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>PTB<\/td>\r\n<td>como calcular or\u00e7amentos de instala\u00e7\u00f5es el\u00e9tricas por m2<\/td>\r\n<td>0<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>ES<\/td>\r\n<td>presupuesto instalaci\u00f3n el\u00e9ctrica<\/td>\r\n<td>30<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>ES<\/td>\r\n<td>presupuesto instalaci\u00f3n el\u00e9ctrica vivienda<\/td>\r\n<td>30<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>ES<\/td>\r\n<td>como se presupuesta una instalaci\u00f3n el\u00e9ctrica<\/td>\r\n<td>20<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>ES<\/td>\r\n<td>modelo de presupuesto de instalaciones electricas<\/td>\r\n<td>20<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>ES<\/td>\r\n<td>presupuesto de instalaciones electricas<\/td>\r\n<td>20<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>ES<\/td>\r\n<td>presupuesto de una instalaci\u00f3n el\u00e9ctrica<\/td>\r\n<td>20<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>ES<\/td>\r\n<td>presupuesto instalaci\u00f3n el\u00e9ctrica vivienda unifamiliar<\/td>\r\n<td>20<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>ES<\/td>\r\n<td>presupuestos instalaciones electricas ejemplos<\/td>\r\n<td>20<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>ES<\/td>\r\n<td>ejemplos de presupuestos de instalaciones electricas<\/td>\r\n<td>10<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>ES<\/td>\r\n<td>presupuesto de instalaciones el\u00e9ctricas<\/td>\r\n<td>10<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>ES<\/td>\r\n<td>presupuesto instalaci\u00f3n el\u00e9ctrica completa<\/td>\r\n<td>10<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>ES<\/td>\r\n<td>presupuesto instalaci\u00f3n el\u00e9ctrica de una vivienda<\/td>\r\n<td>10<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>ES<\/td>\r\n<td>presupuestos de instalaciones electricas<\/td>\r\n<td>10<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>ES<\/td>\r\n<td>presupuestos instalaciones electricas<\/td>\r\n<td>10<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>DE<\/td>\r\n<td>elektroinstallation kostenvoranschlag<\/td>\r\n<td>20<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>DE<\/td>\r\n<td>kostenvoranschlag elektroinstallation<\/td>\r\n<td>20<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>DE<\/td>\r\n<td>kostenvoranschlag elektroinstallation muster<\/td>\r\n<td>20<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>DE<\/td>\r\n<td>kostenvoranschlag elektroinstallation einfamilienhaus<\/td>\r\n<td>0<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>DE<\/td>\r\n<td>kostenvoranschlag elektroinstallation haus<\/td>\r\n<td>0<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>","footnotes":""},"categories":[5084],"tags":[5214,5225],"class_list":["post-43814","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bim-estimating","tag-newsletter-397","tag-newsletter-407"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.8 (Yoast SEO v28.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Electrical Takeoff: Common Systems for Cost Estimation - BibLus<\/title>\n<meta name=\"description\" content=\"How to create and what are the simplest and most reliable methods to perform the electrical takeoff for an electrical system?\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/biblus.accasoftware.com\/en\/electrical-takeoff-common-systems-for-cost-estimation\/\" \/>\n<meta property=\"og:locale\" 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