How Much Does an Apartment Renovation Cost?

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This is the main question on everyone's mind before a renovation — and the reason we all search for renovation calculators online and on forums. The problem is that there are too many factors specific to each property, prices shift with inflation, and it's generally hard to get clarity, especially for older buildings. The calculator's figure is a reference point, not an answer. The real answer to "how much will my renovation cost" only comes once you have full clarity on what you'll be doing, with which materials, and once you have exact figures and quantities for your specific home.

If you want to manage your renovation yourself, we've created several tools, the first being a short guide to planning a renovation budget. We cover the rest in the article below.

1. Technical documentation gives you the exact quantities

When you go through our renovation project process — we go through several layout options before you pick the final one — you get clear drawings with quantities and all the necessary installations and their positions. This isn't just a concept or inspiration with unclear applicability. Technical renovation documentation contains specific numbers: wall and floor area for each room, number and type of sockets and switches, linear meters of skirting, number and size of doors and windows, and more.

That means when you request a quote, or go to a building materials store, you already know exactly what and how much you need — no guessing, no buying extra "just in case," and no second trip because something was miscalculated and now needs topping up or returning.

This way, the documentation gives you a list of exact quantities that you, or the contractor you choose, can turn into a real quote at any point — and the sum of real quotes is the closest possible answer to how much your renovation will cost.

2. The renovation budget worksheet lets you track your budget straight from your phone

The next step is organizing the quotes you collect from suppliers and contractors — and that's what the renovation budget planning worksheet is for.

We designed the worksheet specifically for people who aren't used to working with spreadsheets or complex software on a computer. That's why it's built to open and fill in directly from your phone — where the actual supplier calls, site visits, and quote comparisons happen.

In it, you collect the quotes you receive, track a rough plan before every detail is confirmed, and record actual expenses — all in one tool, organized by category, following the real sequence of a renovation.

The tool doesn't tell you what things should cost. It contains no price list and makes no estimate for you. It gives you a structure to organize what you've found out and agreed on yourself — with a quantity column, an estimated and an actually paid amount, and the difference between them, so you gain peace of mind and confidence by tracking your budget at every point in the process.

3. Discounts when working with funkcionalno.bg

Clients who work with us also get additional discounts with our partners — part of how we support the process beyond the documentation itself. For a kitchen project, for example, you receive a detailed appliance selection guide together with promo codes from partners we've selected, which you can use within 6 months if you choose to.

4. Why funkcionalno.bg isn't an intermediary

The platform doesn't connect clients with contractors or suppliers and isn't involved in choosing them. You manage the process and choose who to work with, you collect the quotes, you make the decisions on materials and purchases. Our mission is to give you the technical foundation and the tools to organize your renovation with maximum clarity and peace of mind.

Key Takeaways

• Renovation calculators give a rough figure, but that's not enough to plan a renovation.
• Exact quantities come from your home's technical documentation.
• The renovation budget worksheet is built for phones, specifically for people who don't use complex software.
• Collect real quotes by category and track the difference between your estimate and actual spend.
• funkcionalno.bg provides the tools — you choose the contractors and make the decisions.