How much do ADU plans cost in Atlanta—and how long do they take?

The most useful ADU budget starts by separating planning from construction. The fee to design and document a project is not the price to build it, and the time to produce drawings is not the same as the time to receive a permit.That distinction helps you compare proposals and decide what to do next without mistaking one part of the process for the whole project.

What is inside the planning fee?

The scope may include documenting an existing space, developing a layout, selecting finishes and fixtures, preparing drawings, and coordinating information from other professionals. Some projects need site, structural, civil, or other specialist services. Some include permit filing or support responding to review comments; others do not.

An ADU proposal should identify those responsibilities clearly. Two fees are not directly comparable if one includes existing-condition measurement and developed selections while the other assumes the owner will provide them.

At Delano Designs, ADUs are custom-scoped. We establish what is being designed and documented, then identify separately priced services. We do not treat an unfinished basement conversion and a detached new structure as the same job simply because they contain the same floor area.

Why a small unit can still involve substantial work

Square footage is one useful measurement, but it does not describe every task. A small dwelling still needs a functional layout and coordination of its kitchen, bathroom, openings, and building systems. Site access or an existing structural condition may add work without adding any floor area.

This is why the better question is, “What work does my property and intended use require?” Once that is clear, you can judge whether the proposal covers it.

Budget beyond drawings

Keep separate allowances for the costs that apply to your project: survey and investigation; professional design and engineering; municipal applications and fees; site preparation and utility work; construction; product purchases; and any construction-phase design support.

Identify which amounts are agreed fees, which are estimates, and which have not yet been priced. Ask your project team how it recommends addressing remaining uncertainty. Rental income, resale value, and future approvals should not be treated as guaranteed offsets to the budget.

A timeline has several stages

First comes information gathering and feasibility. Next are layout decisions, design development, and consultant coordination. Drawings then need to be completed for the agreed submission scope. Government review, responses to comments, contractor scheduling, product lead times, and construction follow their own dependencies.

Some work can overlap. Some decisions must happen in sequence. A realistic schedule identifies who owes the next decision and what information is needed, rather than promising one date for everything.

Before you book, ask when design work can start, what the quoted production window includes, how revisions are handled, and which dates are outside the designer’s control. A last-minute change to the layout or intended use may affect both the fee and schedule.

Start with a scoped planning conversation

Bring your property location, any existing survey or plans, photos, your intended use, and your target budget and timing. You do not need to solve the project before asking for help. You do need a shared understanding of what the next paid stage will deliver.

Talk with Delano Designs about your ADU planning scope and the costs to account for before construction.

For the first property questions to address,

read: ADU Plans in Atlanta: What to Check Before Choosing a Layout

To compare a purchased plan with a custom design scope, read Stock vs. Custom ADU Plans for an Atlanta Property.