Technical Supervision, Author's Supervision and «Project Support»: The Difference

2026-08-26

Technical supervision in construction is independent quality-and-quantity control on the client's side: whether the work is done to the design, to the norms, and for the sum in the estimate. Two other phrases orbit it constantly — «author's supervision» and «project support» — and they're confused so often that people pay for one thing and expect another entirely. The difference isn't pedantry: what exactly you hired decides who's responsible for your budget, who's responsible for matching the drawings, and who's responsible for nothing at all despite an impressive name.

Let's go through all three honestly, from the client's side. First — what each actually controls and what it doesn't. Then — when supervision is legally required and when it's your choice. And most importantly, the point of this article: which of the three you actually need, depending on your design, your time, and how ready you are to be on site yourself.

Technical supervision: what it is and what it really controls

Technical supervision is control of construction in the client's interest. The supervising engineer checks what can be verified against the facts: whether the work matches the design, whether state norms are met, whether the material quality is what you're paying for, and whether the volumes in the acts aren't inflated. They have the right to stop substandard work, demand a defect be fixed, and refuse to sign off on a bad job. In essence, these are your eyes on site — eyes that can read drawings and an estimate.

The key word here is independence. By law, technical supervision cannot be performed by someone who works for the contracting or design organization doing the work on that same object. The logic is obvious: you can't inspect yourself. So the «site foreman from the crew» who assures you he'll «check everything himself» is not technical supervision. He's the contractor's man, and in a dispute he's on the contractor's side. Real technical supervision is a separate engineer with a valid qualification certificate issued by a certification board — one who doesn't profit from the building itself.

And now the important part — what technical supervision does not do. It doesn't manage the project. It doesn't run your whole budget or cost it out in advance. It doesn't build the schedule or keep crews from creating downtime. It doesn't coordinate contractors with each other or find replacements for ones who vanish. It checks the quality and volumes of specific works — a narrower job than «managing the build». That's exactly where the confusion lives: people hire technical supervision and think someone else is now responsible for the house. No. You're still responsible for the whole house — supervision just keeps defects from being sealed over.

Author's supervision: why it exists and how it differs

Author's supervision is control by the design's author. The architect or design firm that created your house makes sure the site builds to their drawings, rather than «simplifying as they go». It's governed by a separate guideline (DSTU-N B A.2.2-11:2014), and the whole institution of author's and technical supervision is set out in Cabinet of Ministers Resolution No. 903 of 11 July 2007, «On author's and technical supervision during construction of an architectural object».

The difference from technical supervision is fundamental, and worth learning once and for all. Technical supervision looks at quality and norms: is the concrete strong, is the wall straight, is the act inflated. Author's supervision looks at fidelity to the intent: is that the right node, the right height, did they move a wall, did they swap a structural solution for a cheaper one that breaks the building's engineering logic. Technical supervision is about «done well». Author's supervision is about «done as designed». These can be two different people with different interests, and on a complex project they complement rather than replace each other.

The practical takeaway for a client: author's supervision matters more the more complex and individual your design is. If the house is non-standard — large spans, panoramic glazing, a complex roof — it's the author who sees where a crew's «minor simplification» actually undermines the calculation. On a standard or adapted design, author's supervision is often more formal. On a unique one, it's what saves the intent from turning into «something similar, but not it».

«Project support»: why it's a slippery term

Now the third phrase — and the main trap. Unlike technical and author's supervision, «project support» has no regulatory definition at all. It's not a term from a law or a building code — it's a marketing wrapper that different companies stuff with whatever they like. For one, «support» is the same technical supervision under a prettier name. For another, it's phone consultations. For a third, it's genuine project management. And sometimes there's nothing concrete behind the grand word at all, beyond a line in the contract and a figure next to it.

So the client's rule is simple: when you hear «project support», never buy the word — ask what's actually behind it. Who will physically be on site and how often. What exactly they check — only quality, or also budget, schedule, contractors. Who's responsible if the budget drifts or the deadline slips. Whether the person has a certificate and is independent of the contractor. If these questions get concrete answers — good, you understand what you're paying for. If the answer is vague talk of «full control» and «a team of professionals», that's exactly the case where a solid name covers a void.

To call things by their real names: the actual work people mean by «support» is either narrow technical supervision or full project management. The first is control of specific works. The second is when one party takes on the whole project — budget, schedule, contractors, quality and documents together. These are different amounts of work and different money, and hiding both under one vague word benefits the seller, not you.

Whose side each is on: a short table

To keep the roles straight, hold in view who controls what and, above all, what each does not do. These are four different positions at one construction table.

General contractor — on their own side. Builds for an agreed price. More work and pricier materials are their revenue, so they've no interest in inspecting themselves.
Technical supervision — on the client's side, narrowly. Checks the quality and volumes of specific works against norms and the estimate. Doesn't run the whole budget, doesn't hold the schedule, doesn't coordinate contractors.
Author's supervision — on the design's side. Makes sure what's built matches the author's drawings. Not about installation quality and not about money.
Full project management — fully on the client's side. Holds budget, schedule, contractors, quality and documents together. The only role with no conflict of interest with you.

The main thing is clear: technical and author's supervision are two narrow controllers, each with its own zone. Neither is responsible for the project as a whole. So the question isn't «technical or author's» — on a serious house you often need both. The question is whether narrow supervision is enough for you, or whether you need management that stitches it all together.

When supervision is legally required

There are many myths here, so let's stick to facts. Technical supervision in Ukraine is a legal requirement: the client's duty to ensure it is set out in the Law «On Architectural Activity» and detailed in Resolution No. 903. The client can provide it two ways — with their own service and a certified engineer, or by engaging an outside specialist under contract. For a private builder, the second path is almost always the only real one.

How strictly this applies depends on your object's consequence class. Buildings are split into three responsibility classes: CC1 (minor consequences), CC2 (medium) and CC3 (significant), with the class determined by current building codes (DBN V.1.2-14). Most private homes are CC1, the lowest class. For CC2 and CC3 the requirements are stricter: there, in particular, technical supervision must be independent — not an employee of the object's contractor or designer. The exact class of a specific house is determined by a specialist from its parameters, so if you're building something large or non-standard, clarify this at the start, not after.

Author's supervision follows a slightly different logic. It becomes relevant when there's a developed design with an author: realizing the design while ignoring its author is legally incorrect, and on complex objects author's supervision is directly prescribed. Simply put: law and norms don't leave construction with no control at all. The question is rather whether that control is a formal tick-box signature or real supervision that actually catches problems. And that's your choice and your money, not a state requirement.

What it costs in 2026

It's worth knowing the ballpark, to sense when you're being overcharged and when it's suspiciously cheap. Independent technical supervision in Kyiv in 2026 costs roughly UAH 3,000–5,000 per site visit, averaging about UAH 3,900; a standard package is up to 12 visits a month with documentation (technical-supervision market data, rabotniki.ua, 2026). Author's supervision is paid separately, usually as a designer's service, and its cost depends on the design's complexity and the number of visits.

The state also treats control as a separate budget line, not a free add-on. Under the Guideline on determining construction cost (Ministry of Regional Development order No. 281 of 01.11.2021), up to 1.5% of construction works may go to technical supervision, up to 3% to consulting-engineer services, and up to 5.5% to the whole «client's service plus engineering» block combined. That's a fair benchmark: control costs a few percent of the budget and saves you from far larger losses.

Compare the scale. The spread of turnkey prices on the Kyiv market is more than double: roughly UAH 22,000–32,000/m² for a turnkey house and UAH 12,000–18,000/m² for the shell alone (construction contractor data, 2026). On a 150–200 m² house that's millions of hryvnia. One missed foundation defect or one invoice inflated by 15% on materials costs more than all the supervision for the whole period. That's the whole math: supervision isn't an expense — it's insurance whose price is a few percent of what it protects.

Which supervision you actually need

Now the point of it all. There's no universal answer «hire technical supervision» or «hire author's». The right one depends on three things: your design, your time, and whether there's anyone to hand coordination to. Let's go by scenario.

Scenario one: you're a builder yourself, or you have vetted crews and can be on site several times a week. You'll most likely be fine with one-off technical supervision at the key stages — foundation, concealed works, floor slabs, roof. It backs you up at the moments where a mistake is irreversible, and you manage the rest yourself. Author's supervision on a standard design can be minimal here.

Scenario two: you're building for the first time, you have a job, and you can't live on site. This is where narrow supervision is deceptive. Technical supervision will check the concrete, but it won't call the roofing crew when the masons fall behind, won't recost the budget when steel rises, and won't find a new contractor to replace the one who vanished. All of that is coordination, and it'll fall on you anyway. You need not a controller for one section, but management of the whole project. That's a different, broader role than any supervision — we broke it down in detail in the article on the construction project manager.

Scenario three — an individual or complex design. Here the weight of author's supervision grows: the more unique the house, the more decisions that can't be «simplified» without consequences. Scale matters too. A compact single-story 131 m² house (like project D-7 in the DOMRIY catalog) and a 496 m² house with a basement level, a pool terrace and a gym (project KT-415) demand different intensity of control: the second has more concealed works, several floor slabs, and author's decisions that must be defended on site. The bigger and more complex the house, the less sense there is in skimping on supervision.

Why standalone supervision often doesn't save you

The most common mistake looks like this: a person hires technical supervision, exhales — «now an engineer is responsible for the house» — and six months later finds the house has blown its budget and schedule anyway. Technical supervision isn't to blame: it did its narrow job — checking quality. But between «every job is up to standard» and «the house is built on time and on budget» lies a whole zone no one was responsible for: crew coordination, stage sequencing, purchasing, supply delays, contractor replacements. Narrow supervision doesn't cover that zone by definition.

So the honest advice for a client: first decide what you actually need — a safety net at a few critical stages, or to take the whole project off your plate. If the first — take technical supervision (and author's, if the design is complex) at set points, and manage yourself. If the second — don't hire three narrow controllers hoping they'll assemble into a system. They won't: each has their own narrow zone and no shared interest in seeing the project through. You need one center of responsibility, where supervision is just one of the functions.

How it works at DOMRIY

DOMRIY isn't a crew or a standalone controller. It's a single center of responsibility on the client's side, where both technical and author's supervision are built-in parts of the process — not separate services you have to assemble yourself. The company has operated since 2013; founder Dmytro Skrypka has worked in private houses since 2005, with 200+ completed projects around Kyiv, from compact single-story homes of 130 m² to large family houses of 450+ m².

In practice it looks like this. Before the start — a plot audit and a design with a ±10% budget and a stage-by-stage financing schedule, so the final sum is known before the first nail. During construction — weekly reports with photo and video, contractor control, stage acceptance, and author's and technical supervision as part of the work. From you — up to two hours a week. Here supervision isn't a separate button you buy and then police yourself — it's part of a system where one party is responsible for the result.

Frequently asked questions

Can I hire only technical supervision and skip author's? Yes, if the design is standard or adapted and has few non-standard solutions. On a complex or individual house, don't skip author's supervision — it's what catches the moments where a site simplification undermines the intent. They're two different functions, and on a serious project they don't replace each other.

Is technical supervision legally required? Yes, ensuring technical supervision is the client's duty under the Law «On Architectural Activity» and Resolution No. 903. For higher consequence-class objects (CC2, CC3) it must be independent — not an employee of the contractor or designer. Most private homes fall into class CC1.

How does «project support» differ from supervision? In that it's not a defined term but a market label that can hide anything — from that same technical supervision to full management, or almost nothing. Don't buy the word: ask what's included, who's responsible for budget and schedule, and whether the person is independent of the contractor.

What does technical supervision cost in Kyiv in 2026? Roughly UAH 3,000–5,000 per visit, averaging about 3,900, with a standard package of up to 12 visits a month with documentation. State norms allow up to 1.5% of works cost for technical supervision and up to 5.5% for the client's service and engineering combined.

Do I need supervision or project management? If you can be on site and manage yourself — one-off supervision at critical stages is enough. If you're building for the first time and have no time for daily coordination — you need management, because supervision doesn't run the budget, schedule and contractors. These are different amounts of work.

Your house is the biggest purchase of your life, and it deserves real control — not a solid name in a contract. If you want to understand what your project actually needs, leave a request at domriy.com. The first visit to your plot is free, with no contracts and no obligations. We call back within two hours.

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