Custom home design is a precision process. Every structural calculation, every setback compliance line, every foundation specification is grounded in data specific to your lot—your soil, your grade, your legal boundary, your utility access. Without that data, an architect isn’t designing your home. They’re designing a home for a generic site that may or may not resemble the land you own.

The homeowners we work with in Alpharetta, Milton, Roswell, and the North Georgia mountains frequently arrive at their first design conversation excited about architecture and uninformed about documentation. That gap is understandable—no one tells you what’s required before you hire an architect. But it’s also the gap where the most expensive surprises originate: a design that can’t be permitted because the survey wasn’t reviewed, a foundation specified for the wrong soil, a floor plan that violates a covenant no one disclosed.

This guide covers every document your architect needs before a single line of design work begins—and explains, specifically, why each one matters in Georgia’s regulatory and geological environment.

The Boundary and Topographic Survey: The Legal and Physical Map of Your Land

A survey is not optional, and it is not interchangeable with the plat map included in your closing documents. A plat map shows recorded lot boundaries at a point in time. A current, certified boundary and topographic survey shows where those boundaries actually are today, what the lot looks like in three dimensions, and where every physical feature—trees, drainage courses, existing structures, utility lines—is located relative to those boundaries.

What the Boundary Survey Establishes

• Legal lot boundaries: confirmed by a licensed Georgia surveyor, with iron pins set or found at each corner. This is the legal document your architect uses to determine where setbacks begin and where the buildable envelope ends.
• Recorded easement locations: utility corridors, drainage easements, and access rights-of-way are plotted on the survey relative to the lot boundaries—making their impact on the buildable area visible for the first time.
• Encroachments: existing structures, fences, or improvements that cross property lines in either direction—a condition that must be resolved before design proceeds.

What the Topographic Survey Adds

The topographic component maps the lot’s grade in detail—contour lines at one- or two-foot intervals that reveal the actual slope, drainage patterns, and elevation change across the building footprint. In North Georgia, where grade variation of 20 to 40 feet across a single residential lot is routine, this data is not supplementary. It is the primary input for:

• Building pad selection: identifying the most efficient location for the home’s footprint relative to slope, drainage, and solar orientation.
• Foundation system selection: determining whether a conventional slab, crawlspace, or stepped foundation is appropriate—and estimating the grading scope required to establish a level pad.
• Site preparation cost estimation: grading, retaining wall scope, and driveway engineering are all priced from topographic data. Without a topo survey, these estimates are guesses, and guesses become change orders.

A combined boundary and topographic survey for a North Georgia residential lot typically costs $2,500–$6,000, depending on lot size and terrain complexity. It is the foundation document for every phase of design and permitting that follows. For more details on site analysis, review our comprehensive land feasibility study guide.

Tree Survey and Protection Requirements

In jurisdictions including North Fulton, Milton, Cherokee County, and the City of Alpharetta, local tree protection ordinances require a tree survey identifying all specimen and protected trees within and adjacent to the proposed disturbance area. This survey must be completed before the building footprint is finalized, because protected trees can constrain footprint placement as severely as setbacks. In some cases, a certified arborist’s report is required alongside the tree survey for permit submission.

The Geotechnical (Soil) Report: Protecting Your Foundation from Georgia’s Red Clay and Granite

Georgia’s subsurface is not uniform, and no amount of visual inspection of a lot reveals what’s beneath it. The Piedmont geology underlying most of Metro Atlanta and North Georgia produces two distinct categories of risk—both of which require a designed foundation response, and neither of which can be managed without data.

Georgia’s Two Primary Subsurface Hazards

• Expansive red clay: Georgia’s Piedmont soils are characterized by residual red clay with significant shrink-swell potential—expanding when saturated, contracting sharply during drought. Without a foundation designed specifically for this behavior, differential movement translates directly into structural cracking, door and window misalignment, and long-term repair costs that dwarf the cost of proper foundation design at the outset.
• Shallow granite bedrock: North Georgia sits on one of the most granite-dense geological formations in the eastern United States. Shallow rock encountered during excavation requires blasting or specialized mechanical rock-breaking equipment, adding $15,000–$60,000+ in site costs that cannot be estimated without knowing the rock depth at the specific building footprint.

What a Geotechnical Report Specifies

A geotechnical investigation involves drilling test borings—typically three to five on a residential site—at the proposed building footprint locations. Soil samples are recovered at specified depths, analyzed in a laboratory, and reported by a licensed geotechnical engineer. The report specifies:

• Soil bearing capacity: the load the soil can support per square foot, which determines footing size and depth.
• Shrink-swell classification: the soil’s expansion potential, which drives recommendations for moisture barriers, grade beams, or pier systems.
• Rock depth: the depth at which rock or refusal is encountered in each boring—the primary variable in blasting and excavation cost estimation.
• Foundation recommendations: the engineer’s specific recommendations for foundation type, footing depth, and any required soil treatment or replacement.

This report costs $1,500–$4,000 for a standard residential site and is required for permitting by most Georgia jurisdictions. An architect who designs a custom home foundation without this report is specifying for unknown conditions—a practice that transfers the risk of that unknown directly to the client. Unforeseen ground conditions remain one of the biggest drivers of hidden home construction costs in Georgia.

“An architect who agrees to design your house without a topographic survey and a geotech report isn’t doing you a favor—they are exposing you to catastrophic financial risk. We’ve seen foundation redesigns triggered mid-construction by rock discovered at 18 inches that a $2,500 soil test would have revealed before the first drawing was made. We build on solid ground, legally and physically. These documents are the armor that protects your vision.”

— Kateryna Keaton, Principal Architect, Kteam Architects

Deed, Covenants, and HOA Guidelines: Navigating Invisible Community Laws

Georgia’s public zoning ordinance is the minimum regulatory standard for what can be built on a lot. In many of the communities where our clients build—Milton, Alpharetta, Roswell, and established North Fulton subdivisions—private deed restrictions and HOA architectural standards layer additional requirements on top of the zoning baseline. These private restrictions are legally enforceable, they are not disclosed in listing sheets, and they frequently survive the sale without the buyer’s knowledge.

Restrictive Covenants: What They Can Govern

Deed covenants are recorded against the property and run with the land—meaning they bind every future owner. In premium Georgia residential communities, covenants commonly restrict:

• Minimum square footage for heated living area—establishing a floor below which the home’s size cannot fall regardless of what zoning would permit.
• Exterior materials and finish specifications—mandating masonry, brick, or specific siding standards and prohibiting others.
• Roofline and pitch requirements—constraining the architectural vocabulary of the home’s exterior independent of county overlay standards.
• Accessory structure restrictions—governing detached garages, guest houses, pool houses, and outbuildings in terms of size, placement, and materials.
• Fence and landscape standards—specifying permitted fence types, heights, and locations, and sometimes mandating landscape buffers.

HOA Architectural Review Boards

Lots within planned communities governed by a Homeowners Association frequently require submission to an Architectural Review Committee (ARC) or Design Review Board (DRB) before permits can be pulled or construction can begin. This review process evaluates the proposed design against the community’s Architectural Standards and can result in:

• Mandatory design revisions before approval is granted
• Material substitution requirements
• Roofline, elevation, or massing modifications
• Delays of 30 to 90 days while the review board processes the submission

Understanding HOA review requirements before schematic design begins—not after Construction Documents are complete—prevents the costly scenario of redesigning a nearly finished drawing set to satisfy community standards that were always governing but were never reviewed.

The Title Search: Uncovering What the Deed Doesn’t Show

A comprehensive title search, conducted by a licensed Georgia real estate attorney, searches the chain of ownership for all recorded instruments affecting the property: easements, covenants, liens, and encumbrances. This is distinct from the title insurance policy issued at closing—which protects against undiscovered claims but does not disclose the specific restrictions that exist. The title search itself, reviewed by your architect before design begins, is what identifies the private regulatory environment governing your lot.

Proof of Utility Access and Septic Perc Tests: Essential Steps for Estate Lots

In established suburban jurisdictions—Alpharetta proper, Roswell, Sandy Springs—utility availability is usually confirmed through the municipality. In the semi-rural and rural contexts where many of our North Georgia clients build, utility access is a variable that must be verified and documented before any design work begins, because its absence or limitation directly affects what can be permitted.

Municipal Utility Confirmation

For lots with access to public infrastructure, the following documentation should be obtained from the relevant authority before design begins:

• Sewer availability letter: confirmation from the municipality or county utility authority that public sewer is available to the lot and that capacity exists for the intended connection.
• Water availability letter: equivalent confirmation for public water service, including any pressure or flow adequacy notes for fire suppression systems where required.
• Connection fee schedule: the documented cost of sewer and water tap fees, which vary significantly by jurisdiction and must be included in the project’s soft cost budget.

In Fulton County and the City of Atlanta, these connection fees can reach $15,000–$25,000+ per connection for residential projects, and they are rarely disclosed in listing information.

The Soil Percolation Test: The Critical Document for Septic Lots

Lots without access to municipal sewer—including most rural North Georgia parcels, many Cherokee County lots, and some unincorporated Forsyth County properties—require a private septic system permitted by the county health department. Before that permit can be issued, the lot must pass a Soil Percolation (Perc) Test demonstrating that the soil can absorb effluent at a sufficient rate.

The perc test produces three outcomes that directly govern the design process:

• System type determination: whether the lot qualifies for a conventional gravity-fed system ($8,000–$15,000), an alternative pressure-dosed system ($18,000–$35,000), or an advanced treatment system ($30,000–$60,000).
• Drain field location and size: the permitted drain field occupies a fixed area of the lot—typically 2,000 to 5,000 square feet—that cannot be built over, driven over with heavy equipment, or compacted in any way. Its location must be marked on the site plan before the building footprint is finalized.
• Bedroom count cap: the permitted septic capacity determines the maximum number of bedrooms the home can legally contain. A buyer planning a six-bedroom estate on a lot with a four-bedroom perc approval has a constraint that no architectural redesign resolves without either an upgraded system or a regulatory variance.

Well Water Documentation

Lots without public water require a private well. Before design begins, the following should be documented:

• Well depth estimate from a licensed Georgia well driller based on local aquifer data—priced at $15–$30 per foot in North Georgia, with depth varying significantly by location.
• Required setback from septic drain field—Georgia regulations mandate minimum separation distances between the well and the drain field, which must be reflected in the site plan.
• Water quality testing if an existing well is present on the property.

Georgia Permitting Documentation: What Your Architect Prepares

Once the site documents above are assembled, your architect uses them as the foundation for the permit application package submitted to the local Authority Having Jurisdiction (AHJ). Understanding what that package includes—and why each element requires the underlying site documentation—clarifies why the documents in this guide are prerequisites rather than optional supplements within our full architectural design services and broader architectural design process.

The Permit Application Package

Your Pre-Design Document Checklist

Before your first design meeting with Kteam Architects, confirm that the following are either in hand or actively being commissioned:

• ☐ Certified boundary survey by a licensed Georgia surveyor
• ☐ Topographic survey with one- or two-foot contour intervals across the full lot
• ☐ Geotechnical (soil) report with borings at the proposed building footprint
• ☐ Comprehensive title search reviewed by a licensed Georgia real estate attorney
• ☐ Deed and covenant review for all recorded private restrictions
• ☐ HOA Architectural Standards and ARC/DRB submission requirements (if applicable)
• ☐ Sewer and water availability letters from the relevant municipal authority
• ☐ Perc test results and county health department septic permit (if no municipal sewer)
• ☐ Well depth estimate from a licensed driller (if no public water)
• ☐ Tree survey identifying protected and specimen trees within the disturbance area
• ☐ FEMA flood zone confirmation for the specific parcel
• ☐ EPD stream buffer mapping if any waterway is present on or adjacent to the lot

Start With the Right Documents. Build Without Surprises.

The clients who experience the smoothest custom home projects in Alpharetta, Milton, Roswell, and North Georgia are the ones who arrive at the design table with complete site documentation in hand. Not because it’s a formality—because it’s the foundation that every design decision, every structural calculation, and every permit submission is built on.

If you’re preparing to start a custom home project and want clarity on which documents you need and how to obtain them, feel free to contact our team before design begins.