The Custom Home Glossary: 125 Terms Buyers Should Understand

Custom homebuilding has specialized language from real estate, architecture, engineering, lending, insurance, construction, and public approvals. Some terms have formal definitions; others vary by contract, jurisdiction, or company. The safest practice is to ask how a term is defined in the project documents rather than relying only on conversational usage. This glossary provides a practical starting point and links each group of terms to the decision it affects.

At a glance: Learn terms by project stage: property, design, cost, financing, contracts, field work, systems, quality, and closeout. Always use the definitions in applicable agreements, codes, and professional documents.

Land, site, and approvals: terms 1–25

1. Parcel; 2. legal description; 3. title; 4. easement; 5. right-of-way; 6. encroachment; 7. setback; 8. lot coverage; 9. zoning; 10. variance; 11. conditional use; 12. deed restriction; 13. HOA; 14. survey; 15. topographic survey; 16. benchmark; 17. contour; 18. geotechnical report; 19. bearing capacity; 20. expansive soil; 21. groundwater; 22. perc test; 23. septic reserve area; 24. floodplain; 25. defensible space. These terms determine rights, building area, site behavior, and required investigation.

Design and documents: terms 26–50

26. program; 27. adjacency; 28. parti; 29. massing; 30. schematic design; 31. design development; 32. construction documents; 33. plan; 34. elevation; 35. section; 36. detail; 37. reflected ceiling plan; 38. schedule; 39. specification; 40. addendum; 41. bulletin; 42. revision; 43. submittal; 44. shop drawing; 45. mockup; 46. rendering; 47. BIM; 48. area schedule; 49. gross floor area; 50. conditioned area. These distinguish visual ideas from coordinated technical information.

Budget, finance, and contract: terms 51–80

51. hard cost; 52. soft cost; 53. allowance; 54. contingency; 55. escalation; 56. general conditions; 57. overhead; 58. fee; 59. markup; 60. fixed price; 61. cost plus; 62. guaranteed maximum price; 63. alternates; 64. unit price; 65. value engineering; 66. loan-to-cost; 67. loan-to-value; 68. appraisal; 69. draw; 70. retainage; 71. schedule of values; 72. lien waiver; 73. builder’s risk; 74. indemnity; 75. substantial completion; 76. final completion; 77. change order; 78. claim; 79. mediation; 80. arbitration.

Construction and systems: terms 81–105

81. mobilization; 82. excavation; 83. cut and fill; 84. compaction; 85. formwork; 86. footing; 87. slab; 88. foundation wall; 89. framing; 90. sheathing; 91. load path; 92. dried-in; 93. flashing; 94. air barrier; 95. vapor control; 96. thermal bridge; 97. rough-in; 98. MEP; 99. HVAC; 100. Manual J; 101. ERV; 102. commissioning; 103. punch list; 104. as-built; 105. attic stock. These terms describe sequencing, assemblies, performance, and turnover.

Quality and ownership: terms 106–125

106. authority having jurisdiction; 107. code inspection; 108. special inspection; 109. field observation; 110. nonconforming work; 111. deficiency; 112. correction; 113. warranty; 114. callback; 115. maintenance manual; 116. certificate of occupancy; 117. certificate of substantial completion; 118. closeout; 119. O&M manual; 120. balancing; 121. blower-door test; 122. water test; 123. control sample; 124. decision log; 125. assumptions register. These establish how performance, completion, and project knowledge are verified and preserved.

The Builder Concierge point of view

Builder Concierge uses plain language first and preserves the technical term where it controls a contract, code, or professional decision. The buyer should never be forced to approve something because everyone else in the room understands the acronym.

Practical checklist

• Ask for definitions in project-specific documents

• Do not assume the same term means the same thing to every firm

• Connect each unfamiliar term to a decision or responsibility

• Request examples of schedules, submittals, and reports

• Keep a project glossary in the client portal

• Define acronyms on first use

• Use professional advice for legal and code terms

• Update definitions when contracts or jurisdictions change

Frequently asked questions

Is this glossary legally authoritative?

No. Terms can have specific meanings under laws, codes, contracts, standards, and professional documents. Use this as education and verify project definitions.

What is the difference between an allowance and contingency?

An allowance budgets unresolved scope or selection, while contingency reserves for defined uncertainty or risk. Contracts may use terms differently.

What is substantial completion?

It generally refers to a stage when the work is sufficiently complete for intended use, but the exact contractual definition and consequences should be read in the agreement.

What is the difference between a drawing schedule and a project schedule?

A drawing schedule is often a table of components or finishes; a project schedule is the timeline and sequence of activities. Context determines the meaning.

Your next step

Use the Builder Concierge Home Planner to turn your priorities into a structured home vision, then carry that same project record into property, design, budget, and pre-construction decisions. Start your Home Vision Profile.

Related reading

• Complete Custom Home Guide

• Custom Home Decision Map

• Complete Planning Checklist

References

• American Institute of Architects, Defining the architect’s basic services

• American Institute of Architects, The value of a comprehensive owner-architect contract

• International Code Council, 2024 International Residential Code overview

• Consumer Financial Protection Bureau, What is a construction loan?

• USDA NRCS, Web Soil Survey

Builder Concierge publishes educational planning content for prospective custom-home buyers. Costs, codes, financing, site conditions, and professional requirements vary by jurisdiction and project. Concept plans and renderings are not construction documents and require review by appropriately licensed professionals.